Abra bella
 - Abra bella Conrad in Kerr, 1873 [SYNONYM SPECIES 9837:8LF7 nidx=null parent=4WFTC]
 + Abra bella Conrad, 1875 [SYNONYM SPECIES 9839:9G3VM nidx=null parent=4WFTC]
Acanthocarpus meridionalis
 - Acanthocarpus meridionalis Mañé-Garzón, 1980 [ACCEPTED SPECIES 9837:64CTW nidx=null]
 + Acanthocarpus meridionalis Mañé-Garzón, 1979 [ACCEPTED SPECIES 9839:9G3VY nidx=null]
Acanthopleura miles
 - Acanthopleura miles (Carpenter in Pilsbry, 1893) [SYNONYM SPECIES 9837:8ZGG nidx=null parent=6ZFTM]
 + Acanthopleura miles (Pilsbry, 1893) [SYNONYM SPECIES 9839:9G3ZB nidx=null parent=9G69L]
Acanthopleura spiniger
 - Acanthopleura spiniger (G. B. Sowerby II, 1840) [SYNONYM SPECIES 9837:8ZGL nidx=null parent=8ZG4]
 + Acanthopleura spiniger (G. B. Sowerby II, 1839) [SYNONYM SPECIES 9839:9G3W4 nidx=null parent=8ZG9]
Acartiapotamon inflatum
 - Acartiapotamon inflatum (Dai & YC Song in Dai, YC Song, MG Li, ZY Chen, PP Wang & Hu, 1985) [ACCEPTED SPECIES 9837:64G6L nidx=null]
 + Acartiapotamon inflatum (Dai & Song in Dai, Song, Li, Chen, Wang & Hu, 1984) [ACCEPTED SPECIES 9839:9G3W6 nidx=null]
Acavus waltoni
 - Acavus waltoni (Reeve, 1842) [SYNONYM SPECIES 9837:7PS55 nidx=null parent=7SF2R]
 + Acavus waltoni [sic] [SYNONYM SPECIES 9839:9G836 nidx=null parent=7SF2R]
Achatinella wakefieldiae
 - Achatinella wakefieldiae Cox, 1868 [SYNONYM SPECIES 9837:96F3 nidx=null parent=394L4]
 + Achatinella wakefieldiae J. C. Cox, 1868 [SYNONYM SPECIES 9839:9G3W9 nidx=null parent=394L4]
Achelous anceps
 - Achelous anceps (de Saussure, 1858) [ACCEPTED SPECIES 9837:9BXDS nidx=null]
 + Achelous anceps (de Saussure, 1857) [ACCEPTED SPECIES 9839:9GDCG nidx=null]
Achoropsychini
 - Achoropsychini Holzenthal, 1984 [ACCEPTED TRIBE 9837:KJM nidx=null]
 + Achoropsychini Holzenthal, 1984 [ACCEPTED TRIBE 9839:9G6YX nidx=null]
Acmaea virginea
 - Acmaea virginea (Müller O. F., 1776) [SYNONYM SPECIES 9837:64JP9 nidx=null parent=553Q5]
 + Acmaea virginea (O. F. Müller, 1776) [SYNONYM SPECIES 9839:9G3WN nidx=null parent=553Q5]
Acrilla semicostata
 - Acrilla semicostata (Sowerby J., 1814) [ACCEPTED SPECIES 9837:8YKZ9 nidx=null]
 + Acrilla semicostata (J. Sowerby, 1814) [ACCEPTED SPECIES 9839:9GBVV nidx=null]
Actinia alba
 - Actinia alba Risso, 1826 [ACCEPTED SPECIES 9837:64NZL nidx=null]
 + Actinia alba Risso, 1827 [ACCEPTED SPECIES 9839:9G3ZW nidx=null]
Actinia brevicirrhata
 - Actinia brevicirrhata Risso, 1826 [SYNONYM SPECIES 9837:9T63 nidx=null parent=SXGX]
 + Actinia brevicirrhata Risso, 1827 [SYNONYM SPECIES 9839:9G3ZV nidx=null parent=SXGX]
Actinia concentrica
 - Actinia concentrica Risso, 1826 [SYNONYM SPECIES 9837:9T73 nidx=null parent=64NZS]
 + Actinia concentrica Risso, 1827 [SYNONYM SPECIES 9839:9G3ZX nidx=null parent=64NZS]
Actinia corallina
 - Actinia corallina Risso, 1826 [SYNONYM SPECIES 9837:9T75 nidx=null parent=9T7Z]
 + Actinia corallina Risso, 1827 [SYNONYM SPECIES 9839:9G3ZY nidx=null parent=9T7Z]
Actinia rosea
 - Actinia rosea Risso, 1826 [ACCEPTED SPECIES 9837:9TBZ nidx=null]
 + Actinia rosea Risso, 1827 [ACCEPTED SPECIES 9839:9G3ZZ nidx=null]
Actinia rufa
 - Actinia rufa Risso, 1826 [ACCEPTED SPECIES 9837:9TC7 nidx=null]
 + Actinia rufa Risso, 1827 [ACCEPTED SPECIES 9839:9G3ZT nidx=null]
Actinia violacea
 - Actinia violacea Risso, 1826 [ACCEPTED SPECIES 9837:9TDV nidx=null]
 + Actinia violacea Risso, 1827 [ACCEPTED SPECIES 9839:9G422 nidx=null]
Adelastinae
 - Adelastinae Peloso, Frost, Richards, Rodrigues, Donnellan, Matsui, Raxworthy, Biju, Lemmon et al., 2016 [ACCEPTED SUBFAMILY 9837:J3R nidx=null]
 + Adelastinae Peloso, Frost, Richards, Rodrigues, Donnellan, Matsui, Raxworthy, Biju, Lemmon et al., 2016 [ACCEPTED SUBFAMILY 9839:9G6YL nidx=null]
Ademosynoides juxta
 - Ademosynoides juxta Lin, Qibin, 1986 [SYNONYM SPECIES 9837:652Q6 nidx=null parent=3N5PB]
 + Ademosynoides juxta Lin, Qibin, 1986 [SYNONYM SPECIES 9839:9G83L nidx=null parent=3N5PB]
Admete gracilior
 - Admete gracilior (Carpenter in Gabb, 1869) [ACCEPTED SPECIES 9837:654VP nidx=null]
 + Admete gracilior (Carpenter, 1868) [ACCEPTED SPECIES 9839:9G424 nidx=null]
Admete viridula var. producta
 - Admete viridula var. producta Sars G.O., 1878 [SYNONYM VARIETY 9837:5LZRC nidx=null parent=6558T]
 + Admete viridula var. producta G. O. Sars, 1878 [SYNONYM VARIETY 9839:9G6TC nidx=null parent=6558T]
Aegires incisus
 - Aegires incisus (Sars G. O., 1872) [ACCEPTED SPECIES 9837:64WPV nidx=null]
 + Aegires incisus (G. O. Sars, 1872) [ACCEPTED SPECIES 9839:9G3YG nidx=null]
Aegle rugata
 - Aegle rugata White, 1848 [SYNONYM SPECIES 9837:64X36 nidx=null parent=6JVPM]
 + Aegle rugata (H. Milne Edwards, 1834) [SYNONYM SPECIES 9839:9G3YK nidx=null parent=3V6QK]
Aeolis digitata
 - Aeolis digitata Costa A., 1866 [SYNONYM SPECIES 9837:659YC nidx=null parent=PWVG]
 + Aeolis digitata A. Costa, 1866 [SYNONYM SPECIES 9839:9G426 nidx=null parent=PWVG]
Aeolis rubrovittata
 - Aeolis rubrovittata Costa A., 1866 [SYNONYM SPECIES 9837:659YK nidx=null parent=3DRC2]
 + Aeolis rubrovittata A. Costa, 1866 [SYNONYM SPECIES 9839:9G427 nidx=null parent=3DRC2]
Afrolittorina africana
 - Afrolittorina africana (F. Krauss in Philippi, 1847) [ACCEPTED SPECIES 9837:65H92 nidx=null]
 + Afrolittorina africana (Philippi, 1847) [ACCEPTED SPECIES 9839:9G42D nidx=null]
Afrolittorina knysnaensis
 - Afrolittorina knysnaensis (F. Krauss in Philippi, 1847) [ACCEPTED SPECIES 9837:65GWR nidx=null]
 + Afrolittorina knysnaensis (Philippi, 1847) [ACCEPTED SPECIES 9839:9G42F nidx=null]
Afroplectus (Afroplectus) labratus
 - Afroplectus (Afroplectus) labratus Jeannel, 1960 [SYNONYM SPECIES 9837:8XT4W nidx=null parent=65HXJ]
 + Afroplectus (Afroplectus) labratus Jeannel, 1956 [ACCEPTED SPECIES 9839:9G83S nidx=null]
Aglaja taila
 - Aglaja taila Marcus Ev. & Er., 1966 [SYNONYM SPECIES 9837:663CH nidx=null parent=65RCN]
 + Aglaja taila Ev. Marcus & Er. Marcus, 1966 [SYNONYM SPECIES 9839:9G3Z6 nidx=null parent=65RCN]
Akburunella leioconcha
 - Akburunella leioconcha (Kolesnikov, 1932) [ACCEPTED SPECIES 9837:872Y8 nidx=null]
 + Akburunella leioconcha (Andrusov, 1927) [ACCEPTED SPECIES 9839:9G849 nidx=null]
Alcalinae
 - Alcalinae Brown, Siler, Richards, Diesmos & Cannatella, 2015 [ACCEPTED SUBFAMILY 9837:J4B nidx=null]
 + Alcalinae Brown, Siler, Richards, Diesmos & Cannatella, 2015 [ACCEPTED SUBFAMILY 9839:9G6YM nidx=null]
Alebra arisana
 - Alebra arisana (Matsumura, 1931) [ACCEPTED SPECIES 9837:BLHC nidx=null]
 + Alebra arisana (Matsumura, 1932) [ACCEPTED SPECIES 9839:9G429 nidx=null]
Alebra dvigubskii
 - Alebra dvigubskii Zachvatkin, 1948 [SYNONYM SPECIES 9837:99G5H nidx=null parent=BLHT]
 - Alebra dvigubskii Zachvatkin, 1948 [SYNONYM SPECIES 9837:9CNRW nidx=null parent=BLHT]
 + Alebra dvigubskii Zakhvatkin, 1948 [SYNONYM SPECIES 9839:9G42B nidx=null parent=BLHT]
Algophagidae
 - Algophagidae [ACCEPTED FAMILY 9837:66W nidx=null]
 + Algophagidae Fain, 1974 [ACCEPTED FAMILY 9839:9G324 nidx=null]
Allencotyla mcintoshi
 - Allencotyla mcintoshi Van Beneden & Hess, 1863 [ACCEPTED SPECIES 9837:BTJB nidx=null]
 + Allencotyla mcintoshi Price, 1962 [ACCEPTED SPECIES 9839:9G42J nidx=null]
Allomalorhagida
 - Allomalorhagida Sørensen, Dal Zotto, Rho, Herranz, Sánchez, Pardos & Yamasaki, 2015 [ACCEPTED CLASS 9837:7Z5NY nidx=null]
 + Allomalorhagida Sørensen, Dal Zotto, Rho, Herranz, Sánchez, Pardos & Yamasaki, 2015 [ACCEPTED CLASS 9839:9G6Y7 nidx=null]
Allygus (Syringius) rebelatrix
 - Allygus (Syringius) rebelatrix Dlabola, 1997 [SYNONYM SPECIES 9837:8RRM2 nidx=null parent=7BB7M]
 + Allygus (Syringius) rebelatrix Dlabola, 1995 [SYNONYM SPECIES 9839:9G84C nidx=null parent=9G74S]
Allygus (Syringius) rebellatrix
 - Allygus (Syringius) rebellatrix Dlabola, 1997 [SYNONYM SPECIES 9837:8RRLZ nidx=null parent=7BB7M]
 + Allygus (Syringius) rebellatrix Dlabola, 1995 [SYNONYM SPECIES 9839:9G84D nidx=null parent=9G74S]
Alvania (Alvinia) clathrella
 - Alvania (Alvinia) clathrella Seguenza L., 1903 [SYNONYM SPECIES 9837:CB94 nidx=null parent=CBDL]
 + Alvania (Alvinia) clathrella L. Seguenza, 1903 [SYNONYM SPECIES 9839:9G42K nidx=null parent=CBDL]
Alvania ellae
 - Alvania ellae Boettger, 1901 [ACCEPTED SPECIES 9837:7PXJY nidx=null]
 + Alvania ellae O. Boettger, 1902 [ACCEPTED SPECIES 9839:9G84G nidx=null]
Alvania giselae
 - Alvania giselae Boettger, 1901 [ACCEPTED SPECIES 9837:7PXL2 nidx=null]
 + Alvania giselae O. Boettger, 1902 [ACCEPTED SPECIES 9839:9G84H nidx=null]
Amaea (Acrilla) semicostata
 - Amaea (Acrilla) semicostata (Sowerby J., 1814) [SYNONYM SPECIES 9837:8ZH5C nidx=null parent=8YKZ9]
 + Amaea (Acrilla) semicostata (J. Sowerby, 1814) [SYNONYM SPECIES 9839:9GCMS nidx=null parent=9GBVV]
Amberleya jasikofiana
 - Amberleya jasikofiana (d'Orbigny, 1845) [SYNONYM SPECIES 9837:7PZ9T nidx=null parent=7R8MK]
 + Amberleya jasikofiana [sic] [SYNONYM SPECIES 9839:9G84K nidx=null parent=7R8MK]
Ampharete
 - Ampharete Malmgren, 1866 [ACCEPTED GENUS 9837:84LC4 nidx=null]
 + Ampharete Malmgren, 1865 [ACCEPTED GENUS 9839:9G2NL nidx=null]
Ampharete grubei
 - Ampharete grubei Malmgren, 1865 [SYNONYM SPECIES 9837:84WBP nidx=null parent=66DBW]
 + Ampharete grubei Malmgren, 1865 [ACCEPTED SPECIES 9839:CYQK nidx=null]
Amphidesma boysiana
 - Amphidesma boysiana Leach in Gray, 1852 [SYNONYM SPECIES 9837:66FZ3 nidx=null parent=8LF6]
 + Amphidesma boysiana Leach, 1852 [SYNONYM SPECIES 9839:66FYP nidx=null parent=8LF6]
Amphidesma cancellata
 - Amphidesma cancellata d'Orbigny, 1853 [SYNONYM SPECIES 9837:66G9T nidx=null parent=4WFTC]
 + Amphidesma cancellata d'Orbigny, 1842 [SYNONYM SPECIES 9839:9G43N nidx=null parent=4WFTC]
Amphiops caristripus
 - Amphiops caristripus Jia, Feng-Long, 1994 [ACCEPTED SPECIES 9837:D4R6 nidx=null]
 + Amphiops caristripus Jia, Feng-Long, 1994 [ACCEPTED SPECIES 9839:9G85B nidx=null]
Amphithrax bellii
 - Amphithrax bellii (Gerstaecker, 1857) [ACCEPTED SPECIES 9837:84BH2 nidx=null]
 + Amphithrax bellii (Gerstaecker, 1856) [ACCEPTED SPECIES 9839:9G43S nidx=null]
Ampullaria ambulacrum
 - Ampullaria ambulacrum Sowerby J., 1822 [SYNONYM SPECIES 9837:8ZGZP nidx=null parent=8YL46]
 + Ampullaria ambulacrum J. Sowerby, 1822 [SYNONYM SPECIES 9839:9GCMQ nidx=null parent=9GBW4]
Ampullonatica ambulacrum
 - Ampullonatica ambulacrum (Sowerby J., 1822) [ACCEPTED SPECIES 9837:8YL46 nidx=null]
 + Ampullonatica ambulacrum (J. Sowerby, 1822) [ACCEPTED SPECIES 9839:9GBW4 nidx=null]
Amusium laurenti
 - Amusium laurenti (Gmelin, 1791) [SYNONYM SPECIES 9837:D8H6 nidx=null parent=6HJYH]
 + Amusium laurenti [sic] [SYNONYM SPECIES 9839:9G43W nidx=null parent=6HJYH]
Anaceratagallia
 - Anaceratagallia Zachvatkin, 1946 [ACCEPTED GENUS 9837:8HCQH nidx=null]
 - Anaceratagallia Zachvatkin, 1946 [SYNONYM GENUS 9837:8HCQJ nidx=null parent=8JMZM]
 + Anaceratagallia Zakhvatkin, 1946 [SYNONYM GENUS 9839:9G2NZ nidx=null parent=9G2P3]
 + Anaceratagallia Zakhvatkin, 1946 [ACCEPTED GENUS 9839:9G2P2 nidx=null]
Anaceratagallia (Anaceratagallia)
 - Anaceratagallia (Anaceratagallia) Zachvatkin, 1946 [ACCEPTED SUBGENUS 9837:8JMZM nidx=null]
 - Anaceratagallia (Anaceratagallia) Zachvatkin, 1946 [SYNONYM INFRAGENERIC_NAME 9837:8RH62 nidx=null parent=8JMZM]
 + Anaceratagallia (Anaceratagallia) Zakhvatkin, 1946 [ACCEPTED SUBGENUS 9839:9G2P3 nidx=null]
Anaceratagallia (Anaceratagallia) acuteangulata
 - Anaceratagallia (Anaceratagallia) acuteangulata Zachvatkin, 1946 [ACCEPTED SPECIES 9837:8KH4T nidx=null]
 + Anaceratagallia (Anaceratagallia) acuteangulata Zakhvatkin, 1946 [ACCEPTED SPECIES 9839:9G85D nidx=null]
Anaceratagallia (Oedicora) kerzhneri
 - Anaceratagallia (Oedicora) kerzhneri Emeljanov, 1987 [ACCEPTED SPECIES 9837:8KJF4 nidx=null]
 + Anaceratagallia (Oedicora) kerzhneri Emeljanov, 1988 [ACCEPTED SPECIES 9839:9G449 nidx=null]
Anaceratagallia acuteangulata
 - Anaceratagallia acuteangulata Zachvatkin, 1946 [AMBIGUOUS_SYNONYM SPECIES 9837:8JPD2 nidx=null parent=8KH4T]
 + Anaceratagallia acuteangulata Zakhvatkin, 1946 [AMBIGUOUS_SYNONYM SPECIES 9839:9G85F nidx=null parent=9G85D]
Anaceratagallia kerzhneri
 - Anaceratagallia kerzhneri Emeljanov, 1987 [SYNONYM SPECIES 9837:8HV5V nidx=null parent=8KJF4]
 + Anaceratagallia kerzhneri Emeljanov, 1988 [SYNONYM SPECIES 9839:9G448 nidx=null parent=9G449]
Anacertagallia
 - Anacertagallia Zachvatkin, 1946 [SYNONYM GENUS 9837:8RSQS nidx=null parent=8JMZM]
 + Anacertagallia Zakhvatkin, 1946 [SYNONYM GENUS 9839:9G7MR nidx=null parent=9G2P3]
Anadara rotundicostata
 - Anadara rotundicostata (Reeve, 1843) [ACCEPTED SPECIES 9837:DCHF nidx=null]
 + Anadara rotundicostata (Reeve, 1844) [ACCEPTED SPECIES 9839:9G43Y nidx=null]
Anapleini
 - Anapleini Olexa, 1982 [ACCEPTED TRIBE 9837:KKX nidx=null]
 + Anapleini Olexa, 1982 [ACCEPTED TRIBE 9839:9G6YY nidx=null]
Anemonia
 - Anemonia Risso, 1826 [ACCEPTED GENUS 9837:7NP49 nidx=null]
 + Anemonia Risso, 1827 [ACCEPTED GENUS 9839:9FZZX nidx=null]
Anemonia aedulis
 - Anemonia aedulis Risso, 1826 [SYNONYM SPECIES 9837:DXMG nidx=null parent=DXNV]
 + Anemonia aedulis Risso, 1827 [SYNONYM SPECIES 9839:9G44B nidx=null parent=DXNV]
Anemonia vagans
 - Anemonia vagans Risso, 1826 [SYNONYM SPECIES 9837:DXNY nidx=null parent=DXNV]
 + Anemonia vagans Risso, 1827 [SYNONYM SPECIES 9839:9G44C nidx=null parent=DXNV]
Anisodoris punctuolata
 - Anisodoris punctuolata (d'Orbigny, 1836) [SYNONYM SPECIES 9837:6748T nidx=null parent=35GL6]
 + Anisodoris punctuolata (d'Orbigny, 1837) [SYNONYM SPECIES 9839:9G44D nidx=null parent=35GL6]
Anisothyris hauxwelli var. crassa
 - Anisothyris hauxwelli var. crassa Woodward, 1971 [SYNONYM VARIETY 9837:878TZ nidx=null parent=868JF]
 + Anisothyris hauxwelli var. crassa H. Woodward, 1871 [SYNONYM VARIETY 9839:9G9PT nidx=null parent=868JF]
Anisothyris hauxwelli var. distorta
 - Anisothyris hauxwelli var. distorta Woodward, 1971 [SYNONYM VARIETY 9837:876GK nidx=null parent=868JF]
 + Anisothyris hauxwelli var. distorta H. Woodward, 1871 [SYNONYM VARIETY 9839:9G9PV nidx=null parent=868JF]
Anodonta ferussacciana
 - Anodonta ferussacciana 'I. Lea, 1834' [SYNONYM SPECIES 9837:8TMXB nidx=null parent=6767L]
 + Anodonta ferussacciana [sic] [SYNONYM SPECIES 9839:9G44H nidx=null parent=6767L]
Anodontoides ferrusacianus
 - Anodontoides ferrusacianus (I. Lea, 1834) [SYNONYM SPECIES 9837:5V5VM nidx=null parent=6767L]
 + Anodontoides ferrusacianus [sic] [SYNONYM SPECIES 9839:9G44L nidx=null parent=6767L]
Anomalinoides balakhmatovae
 - Anomalinoides balakhmatovae Kisselman, 1974 [ACCEPTED SPECIES 9837:7ZZZD nidx=null]
 + Anomalinoides balakhmatovae Kiselman, 1974 [ACCEPTED SPECIES 9839:9G44M nidx=null]
Anomalorbis hemistoma
 - Anomalorbis hemistoma (Sowerby J., 1816) [SYNONYM SPECIES 9837:8ZHLY nidx=null parent=8V7DR]
 + Anomalorbis hemistoma (J. Sowerby, 1816) [SYNONYM SPECIES 9839:9GCMX nidx=null parent=8V7DR]
Anomaluromorpha
 - Anomaluromorpha Bugge, 1974 [ACCEPTED SUBORDER 9837:4CJ nidx=null]
 + Anomaluromorpha Bugge, 1974 [ACCEPTED SUBORDER 9839:9G6Y9 nidx=null]
Anomia aculeata
 - Anomia aculeata Müller O.F., 1776 [SYNONYM SPECIES 9837:676GV nidx=null parent=3L7BL]
 + Anomia aculeata O. F. Müller, 1776 [SYNONYM SPECIES 9839:9G44Q nidx=null parent=3L7BL]
Anoplotettix kofleri
 - Anoplotettix kofleri Dlabola, 1997 [ACCEPTED SPECIES 9837:66WNH nidx=null]
 + Anoplotettix kofleri Dlabola, 1995 [ACCEPTED SPECIES 9839:9G45H nidx=null]
Anteglosia essoensis
 - Anteglosia essoensis Vokes H. E., 1948 [ACCEPTED SPECIES 9837:66XSQ nidx=null]
 + Anteglosia essoensis H. E. Vokes, 1948 [ACCEPTED SPECIES 9839:9G44S nidx=null]
Antillocaprinidae
 - Antillocaprinidae Mac Gillavry, 1937 [ACCEPTED FAMILY 9837:7NHC4 nidx=null]
 + Antillocaprinidae MacGillavry, 1937 [ACCEPTED FAMILY 9839:9G326 nidx=null]
Aphelodoris brunnea
 - Aphelodoris brunnea Bergh, 1908 [ACCEPTED SPECIES 9837:FCX7 nidx=null]
 + Aphelodoris brunnea Bergh, 1907 [ACCEPTED SPECIES 9839:9G44Z nidx=null]
Aphrodes bicincta centrorossicus
 - Aphrodes bicincta centrorossicus Zachvatkin, 1953 [SYNONYM SUBSPECIES 9837:8RV5X nidx=null parent=8JPK6]
 + Aphrodes bicincta centrorossicus Zakhvatkin, 1953 [SYNONYM SUBSPECIES 9839:9G9LW nidx=null parent=8JPK6]
Aphrodes hamiltoni
 - Aphrodes hamiltoni Quartau & Borges, 2003 [ACCEPTED SPECIES 9837:FK4D nidx=null]
 + Aphrodes hamiltoni Quartau & Borges, 2004 [ACCEPTED SPECIES 9839:9G46Q nidx=null]
Aphrodes makarovi
 - Aphrodes makarovi Zachvatkin, 1948 [ACCEPTED SPECIES 9837:8JPL9 nidx=null]
 + Aphrodes makarovi Zakhvatkin, 1948 [ACCEPTED SPECIES 9839:9G75J nidx=null]
Aphrophora signoretii
 - Aphrophora signoretii Fitch, 1856 [ACCEPTED SPECIES 9837:99GF5 nidx=null]
 + Aphrophora signoretii Fitch, 1856 [ACCEPTED SPECIES 9839:9G46S nidx=null]
Apiotrigonia
 - Apiotrigonia Cox, 1952 [ACCEPTED GENUS 9837:7NQJR nidx=null]
 + Apiotrigonia L. R. Cox, 1952 [ACCEPTED GENUS 9839:9G363 nidx=null]
Apistogramma amoena
 - Apistogramma amoena (Cope, 1872) [ACCEPTED SPECIES 9837:FN9Y nidx=null]
 + Apistogramma amoena (Cope, 1872) [ACCEPTED SPECIES 9839:9G453 nidx=null]
Aplysia eusiphonata
 - Aplysia eusiphonata Bergh, 1908 [SYNONYM SPECIES 9837:7Q6CG nidx=null parent=FQ4D]
 + Aplysia eusiphonata Bergh, 1907 [SYNONYM SPECIES 9839:9G455 nidx=null parent=FQ4D]
Aplysia gargantua
 - Aplysia gargantua Bergh, 1908 [SYNONYM SPECIES 9837:7Q6CN nidx=null parent=FQ4D]
 + Aplysia gargantua Bergh, 1907 [SYNONYM SPECIES 9839:9G456 nidx=null parent=FQ4D]
Aplysia gilchristi
 - Aplysia gilchristi Bergh, 1908 [SYNONYM SPECIES 9837:7Q6D2 nidx=null parent=FQ4D]
 + Aplysia gilchristi Bergh, 1907 [SYNONYM SPECIES 9839:9G457 nidx=null parent=FQ4D]
Aplysia guttata
 - Aplysia guttata Sars M., 1840 [SYNONYM SPECIES 9837:FQ3W nidx=null parent=67NTY]
 + Aplysia guttata M. Sars, 1840 [SYNONYM SPECIES 9839:9G458 nidx=null parent=67NTY]
Aplysia nexa
 - Aplysia nexa Thompson W., 1845 [SYNONYM SPECIES 9837:FQ4Q nidx=null parent=67NTY]
 + Aplysia nexa W. Thompson, 1845 [SYNONYM SPECIES 9839:9G459 nidx=null parent=67NTY]
Aplysia poikilia
 - Aplysia poikilia Bergh, 1908 [SYNONYM SPECIES 9837:7Q6FG nidx=null parent=FQ4D]
 + Aplysia poikilia Bergh, 1907 [SYNONYM SPECIES 9839:9G45B nidx=null parent=FQ4D]
Apochela
 - Apochela Schuster, Nelson, Grigarick & Christenberry, 1980 [ACCEPTED ORDER 9837:Q6 nidx=null]
 + Apochela Schuster, Nelson, Grigarick & Christenberry, 1980 [ACCEPTED ORDER 9839:9G25H nidx=null]
Arboridia
 - Arboridia Zachvatkin, 1946 [ACCEPTED GENUS 9837:8HD6C nidx=null]
 + Arboridia Zakhvatkin, 1946 [ACCEPTED GENUS 9839:9G2V9 nidx=null]
Arboridia (Arboridia)
 - Arboridia (Arboridia) Zachvatkin, 1946 [ACCEPTED SUBGENUS 9837:8JMFS nidx=null]
 + Arboridia (Arboridia) Zakhvatkin, 1946 [ACCEPTED SUBGENUS 9839:9G2VD nidx=null]
Arboridia (Arboridia) expansa
 - Arboridia (Arboridia) expansa (Zachvatkin, 1946) [ACCEPTED SPECIES 9837:G6JH nidx=null]
 + Arboridia (Arboridia) expansa (Zakhvatkin, 1946) [ACCEPTED SPECIES 9839:9G47M nidx=null]
Arca rotundicostata
 - Arca rotundicostata Reeve, 1843 [SYNONYM SPECIES 9837:G75W nidx=null parent=DCHF]
 + Arca rotundicostata Reeve, 1844 [SYNONYM SPECIES 9839:9G45C nidx=null parent=9G43Y]
Arcopagia (Bertinella) filosa
 - Arcopagia (Bertinella) filosa (Sowerby J. de C., 1823) [SYNONYM SPECIES 9837:8ZCDK nidx=null parent=8YL78]
 + Arcopagia (Bertinella) filosa (J. de C. Sowerby, 1823) [SYNONYM SPECIES 9839:9GBWB nidx=null parent=9GBW9]
Arcopagia filosa
 - Arcopagia filosa (Sowerby J. de C., 1823) [ACCEPTED SPECIES 9837:8YL78 nidx=null]
 + Arcopagia filosa (J. de C. Sowerby, 1823) [ACCEPTED SPECIES 9839:9GBW9 nidx=null]
Arcopotamonautes unisulcatus
 - Arcopotamonautes unisulcatus (Rathbun, 1921) [ACCEPTED SPECIES 9837:9FY89 nidx=null]
 + Arcopotamonautes unisulcatus (Rathbun, 1933) [ACCEPTED SPECIES 9839:9GDGB nidx=null]
Argonauta arctica
 - Argonauta arctica Fabricius O., 1780 [SYNONYM SPECIES 9837:67QSL nidx=null parent=6PZKV]
 + Argonauta arctica O. Fabricius, 1780 [SYNONYM SPECIES 9839:9G45K nidx=null parent=6PZKV]
Arocephalus (Omskius)
 - Arocephalus (Omskius) Linnavuori, 1954 [SYNONYM SUBGENUS 9837:8RRHN nidx=null parent=8R5L9]
 + Arocephalus (Omskius) Linnavuori, 1955 [SYNONYM SUBGENUS 9839:9G7YR nidx=null parent=9G3FV]
Arrowinini
 - Arrowinini Solodovnikov & Newton, 2005 [ACCEPTED TRIBE 9837:8X6M9 nidx=null]
 + Arrowinini Solodovnikov & Newton, 2005 [ACCEPTED TRIBE 9839:9G6YZ nidx=null]
Artachaea rubida
 - Artachaea rubida Bergh, 1881 [ACCEPTED SPECIES 9837:GVG6 nidx=null]
 + Artachaea rubida Bergh, 1882 [ACCEPTED SPECIES 9839:9G45Q nidx=null]
Asianidia
 - Asianidia Zachvatkin, 1946 [ACCEPTED GENUS 9837:8HDBV nidx=null]
 + Asianidia Zakhvatkin, 1946 [ACCEPTED GENUS 9839:9FZZZ nidx=null]
Atagema intecta
 - Atagema intecta (Kelaart, 1859) [ACCEPTED SPECIES 9837:J7VY nidx=null]
 + Atagema intecta (Kelaart, 1858) [ACCEPTED SPECIES 9839:9G475 nidx=null]
Atagema osseosa
 - Atagema osseosa (Kelaart, 1859) [ACCEPTED SPECIES 9837:J7W4 nidx=null]
 + Atagema osseosa (Kelaart, 1858) [ACCEPTED SPECIES 9839:9G476 nidx=null]
Atagema triphylla
 - Atagema triphylla (Bergh, 1892) [ACCEPTED SPECIES 9837:67VJL nidx=null]
 + Atagema triphylla (Bergh, 1881) [ACCEPTED SPECIES 9839:9G477 nidx=null]
Atheta (Philhygra)
 - Atheta (Philhygra) Mulsant & Rey, 1873 [ACCEPTED SUBGENUS 9837:8VRYQ nidx=null]
 + Atheta (Philhygra) Mulsant & Rey, 1873 [ACCEPTED SUBGENUS 9839:9G236 nidx=null]
Athleta (Volutospina) scalaris
 - Athleta (Volutospina) scalaris (Sowerby J. de C., 1843) [SYNONYM SPECIES 9837:8ZCF5 nidx=null parent=8YL9P]
 + Athleta (Volutospina) scalaris (J. de C. Sowerby, 1843) [SYNONYM SPECIES 9839:9GBWF nidx=null parent=9GBWG]
Athleta scalaris
 - Athleta scalaris (Sowerby J. de C., 1843) [ACCEPTED SPECIES 9837:8YL9P nidx=null]
 + Athleta scalaris (J. de C. Sowerby, 1843) [ACCEPTED SPECIES 9839:9GBWG nidx=null]
Athysanella (Amphipyga) rubicunda
 - Athysanella (Amphipyga) rubicunda Ball & Beamer, 1940 [SYNONYM SPECIES 9837:8HVT6 nidx=null parent=8JPS9]
 + Athysanella (Amphipyga) rubicunda Ball & Beamer, 1940 [ACCEPTED SPECIES 9839:JGDD nidx=null]
Athysanella magadana
 - Athysanella magadana Emeljanov, 1987 [ACCEPTED SPECIES 9837:JGGL nidx=null]
 + Athysanella magadana Emeljanov, 1988 [ACCEPTED SPECIES 9839:9G48Z nidx=null]
Aulonochares novoairensis
 - Aulonochares novoairensis Girón & Short, 2019 [ACCEPTED SPECIES 9837:8XVDJ nidx=null]
 + Aulonochares novoairensis [ACCEPTED SPECIES 9839:9G884 nidx=null]
Auriculina coarctata
 - Auriculina coarctata Sars G.O., 1878 [SYNONYM SPECIES 9837:JTX4 nidx=null parent=49JSK]
 + Auriculina coarctata G. O. Sars, 1878 [SYNONYM SPECIES 9839:9G47H nidx=null parent=49JSK]
Auriculina insculpta var. nobilis
 - Auriculina insculpta var. nobilis Sars G.O., 1878 [SYNONYM VARIETY 9837:7LBX8 nidx=null parent=49JSP]
 + Auriculina insculpta var. nobilis G. O. Sars, 1878 [SYNONYM VARIETY 9839:9G6TJ nidx=null parent=49JSP]
Austinixa marianae
 - Austinixa marianae Salgado-Barragán, Raymonduo-Huizar & Ayón-Parente, 2020 [ACCEPTED SPECIES 9837:8H864 nidx=null]
 + Austinixa marianae Salgado-Barragán, Raymonduo-Huizar & Ayón-Parente, 2021 [ACCEPTED SPECIES 9839:9G886 nidx=null]
Austrocypraea reevei reevei
 - Austrocypraea reevei reevei (G. B. Sowerby I, 1832) [ACCEPTED SUBSPECIES 9837:7GM4W nidx=null]
 + Austrocypraea reevei reevei (J. E. Gray, 1832) [ACCEPTED SUBSPECIES 9839:9G6N2 nidx=null]
Austropeplea lessoni
 - Austropeplea lessoni (Deshayes, 1830) [SYNONYM SPECIES 9837:7Q9D6 nidx=null parent=68S7D]
 + Austropeplea lessoni (Deshayes, 1831) [SYNONYM SPECIES 9839:9G49Q nidx=null parent=68S7D]
Axinus grandis
 - Axinus grandis (A. E. Verrill & S. Smith [in Verrill] , 1885) [ACCEPTED SPECIES 9837:8SW73 nidx=null]
 + Axinus grandis (A. E. Verrill & S. Smith, 1885) [ACCEPTED SPECIES 9839:K44Y nidx=null]
Axinus pusillus
 - Axinus pusillus Sars M., 1864 [SYNONYM SPECIES 9837:K456 nidx=null parent=K444]
 + Axinus pusillus M. Sars, 1864 [SYNONYM SPECIES 9839:9G47S nidx=null parent=K444]
Baicalia (Trichiobaicalia) duthiersi
 - Baicalia (Trichiobaicalia) duthiersi (W. Dybowski, 1875) [SYNONYM SPECIES 9837:5WB2G nidx=null parent=55DRG]
 + Baicalia (Trichiobaicalia) duthiersi [sic] [SYNONYM SPECIES 9839:9G47X nidx=null parent=55DRG]
Balanophyllia (Balanophyllia) europaea
 - Balanophyllia (Balanophyllia) europaea (Risso, 1826) [ACCEPTED SPECIES 9837:KG2D nidx=null]
 + Balanophyllia (Balanophyllia) europaea (Risso, 1827) [ACCEPTED SPECIES 9839:9G47Y nidx=null]
Bambusimukaria
 - Bambusimukaria [ACCEPTED GENUS 9837:8RGHZ nidx=null]
 + Bambusimukaria Chen, Yang & Li, 2012 [SYNONYM GENUS 9839:9G7N2 nidx=null parent=9G7N3]
 + Bambusimukaria Yang, Chen & Li, 2016 [ACCEPTED GENUS 9839:9G7N3 nidx=null]
Banffellinae
 - Banffellinae Vachard & Le Coze, 2021 [PROVISIONALLY_ACCEPTED SUBFAMILY 9837:8759L nidx=null]
 + Banffellinae Vachard & Le Coze, 2022 [ACCEPTED SUBFAMILY 9839:9G7L8 nidx=null]
Baseodiscus mexicanum
 - Baseodiscus mexicanum ? [SYNONYM SPECIES 9837:9CP8K nidx=null parent=84XNX]
 + Baseodiscus mexicanum ? [SYNONYM SPECIES 9839:9G482 nidx=null parent=84XNX]
Baseodiscus ophiocephalus
 - Baseodiscus ophiocephalus ? [SYNONYM SPECIES 9837:9CP8L nidx=null parent=39JVV]
 + Baseodiscus ophiocephalus ? [SYNONYM SPECIES 9839:9G483 nidx=null parent=39JVV]
Batillaria (Vicinocerithium) concava
 - Batillaria (Vicinocerithium) concava (Sowerby J., 1822) [SYNONYM SPECIES 9837:8ZFLQ nidx=null parent=8YPNJ]
 + Batillaria (Vicinocerithium) concava (J. Sowerby, 1822) [SYNONYM SPECIES 9839:9GCMD nidx=null parent=9GC4B]
Batracomorphus breviceps procerus
 - Batracomorphus breviceps procerus Zachvatkin, 1953 [SYNONYM SUBSPECIES 9837:8KN6M nidx=null parent=KZYZ]
 + Batracomorphus breviceps procerus Zakhvatkin, 1953 [SYNONYM SUBSPECIES 9839:9G9LY nidx=null parent=KZYZ]
Bela angulosa
 - Bela angulosa Sars G. O., 1878 [SYNONYM SPECIES 9837:5WH5W nidx=null parent=6VY3H]
 + Bela angulosa G. O. Sars, 1878 [SYNONYM SPECIES 9839:9G485 nidx=null parent=9G5ZF]
Bela assimilis
 - Bela assimilis Sars G. O., 1878 [SYNONYM SPECIES 9837:L9HM nidx=null parent=4MTND]
 + Bela assimilis G. O. Sars, 1878 [SYNONYM SPECIES 9839:9G486 nidx=null parent=9G5ZG]
Bela bicarinata var. rufescens
 - Bela bicarinata var. rufescens Sars G.O., 1878 [SYNONYM VARIETY 9837:873F3 nidx=null parent=6BR7H]
 + Bela bicarinata var. rufescens G. O. Sars, 1878 [SYNONYM VARIETY 9839:9G9PW nidx=null parent=6BR7H]
Bela conoidea
 - Bela conoidea Sars G. O., 1878 [SYNONYM SPECIES 9837:L9J4 nidx=null parent=32KW5]
 + Bela conoidea G. O. Sars, 1878 [SYNONYM SPECIES 9839:9G487 nidx=null parent=9G4JS]
Bela obliqua
 - Bela obliqua Sars G. O., 1878 [SYNONYM SPECIES 9837:L9L3 nidx=null parent=48XL2]
 + Bela obliqua G. O. Sars, 1878 [SYNONYM SPECIES 9839:9G489 nidx=null parent=9G5LX]
Bela pyramidalis var. semiplicata
 - Bela pyramidalis var. semiplicata Sars G.O., 1878 [SYNONYM VARIETY 9837:5MJSS nidx=null parent=48XLC]
 + Bela pyramidalis var. semiplicata G. O. Sars, 1878 [SYNONYM VARIETY 9839:9G6TK nidx=null parent=48XLC]
Bela scalaris var. ecarinata
 - Bela scalaris var. ecarinata Sars G.O., 1878 [SYNONYM VARIETY 9837:5MJSX nidx=null parent=4MTPW]
 + Bela scalaris var. ecarinata G. O. Sars, 1878 [SYNONYM VARIETY 9839:9G6TL nidx=null parent=4MTPW]
Bela scalaroides
 - Bela scalaroides Sars G. O., 1878 [SYNONYM SPECIES 9837:L9LX nidx=null parent=4MTPX]
 + Bela scalaroides G. O. Sars, 1878 [SYNONYM SPECIES 9839:9G48B nidx=null parent=9G5ZH]
Bela tenuicostata
 - Bela tenuicostata Sars G. O., 1878 [SYNONYM SPECIES 9837:L9MF nidx=null parent=48XM3]
 + Bela tenuicostata G. O. Sars, 1878 [SYNONYM SPECIES 9839:9G48C nidx=null parent=9G5LZ]
Bela violacea var. laevior
 - Bela violacea var. laevior Sars G.O., 1878 [SYNONYM VARIETY 9837:5MJT3 nidx=null parent=6BR7H]
 + Bela violacea var. laevior G. O. Sars, 1878 [SYNONYM VARIETY 9839:9G6TM nidx=null parent=6BR7H]
Beltrana
 - Beltrana [ACCEPTED GENUS 9837:8KHMC nidx=null]
 + Beltrana Gonçalves, Domahovski, Mejdalani & Takiya, 2021 [ACCEPTED GENUS 9839:9G7N7 nidx=null]
Beringiana japonica
 - Beringiana japonica (Martens in Clessin, 1874) [ACCEPTED SPECIES 9837:7QBTW nidx=null]
 + Beringiana japonica (Clessin, 1874) [ACCEPTED SPECIES 9839:9G7G3 nidx=null]
Bolivina prion
 - Bolivina prion Lindenberg, 1965 [ACCEPTED SPECIES 9837:9CPDB nidx=null]
 + Bolivina prion Lindenberg, 1965 [ACCEPTED SPECIES 9839:9G48M nidx=null]
Borneosa brachyphallus
 - Borneosa brachyphallus (Ng, 1995) [ACCEPTED SPECIES 9837:993LP nidx=null]
 + Borneosa brachyphallus (Ng, 2015) [ACCEPTED SPECIES 9839:9GDCJ nidx=null]
Buccinum clathratum
 - Buccinum clathratum A. Adams & Reeve, 1850 [AMBIGUOUS_SYNONYM SPECIES 9837:7QDLQ nidx=null parent=7S598]
 + Buccinum clathratum A. Adams & Reeve, 1850 [SYNONYM SPECIES 9839:NL74 nidx=null parent=42K79]
Buccinum conoideum
 - Buccinum conoideum Sars G.O., 1878 [ACCEPTED SPECIES 9837:NL7G nidx=null]
 + Buccinum conoideum G. O. Sars, 1878 [ACCEPTED SPECIES 9839:9G493 nidx=null]
Buccinum orbiculatum
 - Buccinum orbiculatum Brocchi, 1824 [SYNONYM SPECIES 9837:86WH6 nidx=null parent=86ZFD]
 + Buccinum orbiculatum Brocchi, 1814 [SYNONYM SPECIES 9839:9G89C nidx=null parent=86ZFD]
Buccinum sabini
 - Buccinum sabini Gray J.E., 1824 [SYNONYM SPECIES 9837:NLL7 nidx=null parent=XD4H]
 + Buccinum sabini J. E. Gray, 1824 [SYNONYM SPECIES 9839:9G495 nidx=null parent=XD4H]
Buccinum tumidulum
 - Buccinum tumidulum Sars G. O., 1878 [ACCEPTED SPECIES 9837:NLPH nidx=null]
 + Buccinum tumidulum G. O. Sars, 1878 [ACCEPTED SPECIES 9839:9G496 nidx=null]
Buccinum undatum var. caerulea
 - Buccinum undatum var. caerulea Sars G.O., 1878 [SYNONYM VARIETY 9837:5MP7W nidx=null parent=NLPP]
 + Buccinum undatum var. caerulea G. O. Sars, 1878 [SYNONYM VARIETY 9839:9G6TP nidx=null parent=NLPP]
Buchiidae
 - Buchiidae Cox, 1953 [ACCEPTED FAMILY 9837:7NHN8 nidx=null]
 - Buchiidae Cox, 1953 [PROVISIONALLY_ACCEPTED FAMILY 9837:87C54 nidx=null]
 + Buchiidae L. R. Cox, 1953 [ACCEPTED FAMILY 9839:9G327 nidx=null]
 + Buchiidae L. R. Cox, 1953 [PROVISIONALLY_ACCEPTED FAMILY 9839:9G328 nidx=null]
Buchioidea
 - Buchioidea Cox, 1953 [ACCEPTED SUPERFAMILY 9837:7NGJ4 nidx=null]
 + Buchioidea L. R. Cox, 1953 [ACCEPTED SUPERFAMILY 9839:4VM nidx=null]
Buchotrigonia (Syrotrigonia) fraasi
 - Buchotrigonia (Syrotrigonia) fraasi Cox, 1952 [SYNONYM SPECIES 9837:NMS5 nidx=null parent=54343]
 + Buchotrigonia (Syrotrigonia) fraasi L. R. Cox, 1952 [SYNONYM SPECIES 9839:9G497 nidx=null parent=9G6CL]
Bulimulus albus
 - Bulimulus albus (G. B. Sowerby, 1839) [ACCEPTED SPECIES 9837:NT3P nidx=null]
 + Bulimulus albus (G. B. Sowerby I, 1839) [ACCEPTED SPECIES 9839:9G49B nidx=null]
Bulimus caffer
 - Bulimus caffer F. Krauss in L. Pfeiffer, 1848 [SYNONYM SPECIES 9837:68S5Z nidx=null parent=3G43B]
 + Bulimus caffer L. Pfeiffer, 1848 [SYNONYM SPECIES 9839:9G49D nidx=null parent=9G4VS]
Bulimus cicatricosus var. acutior
 - Bulimus cicatricosus var. acutior Crosse, 1894 [SYNONYM VARIETY 9837:7V58G nidx=null parent=7TZPY]
 + Bulimus cicatricosus var. acutior Crosse, 1895 [SYNONYM VARIETY 9839:9G8NX nidx=null parent=7TZPY]
Bulimus decollatus
 - Bulimus decollatus Draparaud, 1805 [SYNONYM SPECIES 9837:7QG8T nidx=null parent=4TQ5X]
 + Bulimus decollatus (Linnaeus, 1758) [SYNONYM SPECIES 9839:9G49F nidx=null parent=4TQ5X]
Bulimus natalensis
 - Bulimus natalensis F. Krauss in L. Pfeiffer, 1846 [SYNONYM SPECIES 9837:NTGV nidx=null parent=3G43R]
 + Bulimus natalensis L. Pfeiffer, 1846 [SYNONYM SPECIES 9839:9G49G nidx=null parent=9G4VT]
Bulimus quoyi
 - Bulimus quoyi quoyi Cox, 1864 [SYNONYM SPECIES 9837:NTJD nidx=null parent=MN38]
 + Bulimus quoyi Cox, 1864 [SYNONYM SPECIES 9839:9G49H nidx=null parent=MN38]
Bulimus terverii
 - Bulimus terverii Dupotet in E. A. Forbes, 1838 [SYNONYM SPECIES 9837:NTLZ nidx=null parent=3YG5X]
 + Bulimus terverii Forbes, 1838 [SYNONYM SPECIES 9839:9G49J nidx=null parent=9G5CT]
Bulinus natalensis
 - Bulinus natalensis (Krauss in Kuster, 1841) [ACCEPTED SPECIES 9837:NTP9 nidx=null]
 + Bulinus natalensis (Kuster, 1841) [ACCEPTED SPECIES 9839:9G49K nidx=null]
Bulla velutina
 - Bulla velutina Müller O.F., 1776 [SYNONYM SPECIES 9837:NTY3 nidx=null parent=7FLPS]
 + Bulla velutina O. F. Müller, 1776 [SYNONYM SPECIES 9839:9G49L nidx=null parent=7FLPS]
Burbungini
 - Burbungini Moulds, 2005 [ACCEPTED TRIBE 9837:8JK6M nidx=null]
 + Burbungini Moulds, 2005 [ACCEPTED TRIBE 9839:9G6Z3 nidx=null]
Buthraupis
 - Buthraupis Cabanis, 1850 [ACCEPTED GENUS 9837:62HV5 nidx=null]
 + Buthraupis Cabanis, 1851 [ACCEPTED GENUS 9839:9G2ZL nidx=null]
Bythiospeum clessini
 - Bythiospeum clessini (Weinland, 1883) [SYNONYM SPECIES 9837:7QHSD nidx=null parent=P3DB]
 + Bythiospeum clessini (Weinland, 1883) [ACCEPTED SPECIES 9839:P3DW nidx=null]
Bythiospeum diaphanum fernetense
 - Bythiospeum diaphanum fernetense Girardi, 2009 [SYNONYM SUBSPECIES 9837:8TPJG nidx=null parent=695HQ]
 + Bythiospeum diaphanum fernetense Girardi, 2009 [ACCEPTED SUBSPECIES 9839:5DPH9 nidx=null]
Bythiospeum diaphanum montbrunense
 - Bythiospeum diaphanum montbrunense Girardi & Bertrand, 2009 [SYNONYM SUBSPECIES 9837:8TPJJ nidx=null parent=P3F9]
 + Bythiospeum diaphanum montbrunense Girardi & Bertrand, 2009 [ACCEPTED SUBSPECIES 9839:5DPHD nidx=null]
Bythiospeum diaphanum sarriansense
 - Bythiospeum diaphanum sarriansense Girardi, 2009 [SYNONYM SUBSPECIES 9837:8TPJK nidx=null parent=P3FW]
 + Bythiospeum diaphanum sarriansense Girardi, 2009 [ACCEPTED SUBSPECIES 9839:5DPHF nidx=null]
Bythiospeum dubium
 - Bythiospeum dubium (Geyer, 1904) [SYNONYM SPECIES 9837:7QHSG nidx=null parent=P3DB]
 + Bythiospeum dubium (Geyer, 1904) [ACCEPTED SPECIES 9839:68THJ nidx=null]
Bythiospeum exiguum
 - Bythiospeum exiguum (Geyer, 1904) [SYNONYM SPECIES 9837:7QHSH nidx=null parent=P3DB]
 + Bythiospeum exiguum (Geyer, 1904) [ACCEPTED SPECIES 9839:68THQ nidx=null]
Bythiospeum gonostoma
 - Bythiospeum gonostoma (Geyer, 1905) [SYNONYM SPECIES 9837:7QHSS nidx=null parent=P3DB]
 + Bythiospeum gonostoma (Geyer, 1905) [ACCEPTED SPECIES 9839:68THN nidx=null]
Bythiospeum haessleini
 - Bythiospeum haessleini (Zwanziger, 1939) [SYNONYM SPECIES 9837:7QHST nidx=null parent=P3DB]
 + Bythiospeum haessleini (Zwanziger, 1939) [ACCEPTED SPECIES 9839:695HN nidx=null]
Bythiospeum heldii
 - Bythiospeum heldii (Clessin, 1909) [SYNONYM SPECIES 9837:7QHSV nidx=null parent=P3DB]
 + Bythiospeum heldii (Clessin, 1909) [ACCEPTED SPECIES 9839:5X5HT nidx=null]
Bythiospeum labiatum
 - Bythiospeum labiatum (Geyer, 1904) [SYNONYM SPECIES 9837:7QHSW nidx=null parent=P3DB]
 + Bythiospeum labiatum (Geyer, 1904) [ACCEPTED SPECIES 9839:P3F3 nidx=null]
Bythiospeum lamperti
 - Bythiospeum lamperti (Geyer, 1907) [SYNONYM SPECIES 9837:7QHSX nidx=null parent=P3DB]
 + Bythiospeum lamperti (Geyer, 1907) [ACCEPTED SPECIES 9839:P3F4 nidx=null]
Bythiospeum quenstedti
 - Bythiospeum quenstedti (Wiedersheim, 1873) [SYNONYM SPECIES 9837:7QHT5 nidx=null parent=P3DB]
 + Bythiospeum quenstedti (Wiedersheim, 1873) [ACCEPTED SPECIES 9839:P3FQ nidx=null]
Cadulus propinquus
 - Cadulus propinquus Sars G. O., 1878 [ACCEPTED SPECIES 9837:P7L3 nidx=null]
 + Cadulus propinquus G. O. Sars, 1878 [ACCEPTED SPECIES 9839:9G49R nidx=null]
Caelatura rukwaensis
 - Caelatura rukwaensis Cox, 1939 [SYNONYM SPECIES 9837:8ZFHG nidx=null parent=8ZH5T]
 + Caelatura rukwaensis L. R. Cox, 1939 [SYNONYM SPECIES 9839:9GCM9 nidx=null parent=9GCMT]
Calappa rissoana
 - Calappa rissoana Pastore, 1995 [SYNONYM SPECIES 9837:5X6CY nidx=null parent=PFSC]
 + Calappa rissoana Pastore, 1996 [SYNONYM SPECIES 9839:9G49T nidx=null parent=PFSC]
Calappa tuerkayana
 - Calappa tuerkayana Pastore, 1995 [SYNONYM SPECIES 9837:884QL nidx=null parent=PFRC]
 + Calappa tuerkayana Pastore, 1996 [SYNONYM SPECIES 9839:9G49V nidx=null parent=PFRC]
Caloria occidentalis
 - Caloria occidentalis Engel, 1925 [SYNONYM SPECIES 9837:8MW3T nidx=null parent=8NCSJ]
 + Caloria occidentalis Engel, 1925 [SYNONYM SPECIES 9839:Q34R nidx=null parent=379W4]
Campanile (Campanilopa) cornucopiae
 - Campanile (Campanilopa) cornucopiae (Sowerby J., 1818) [SYNONYM SPECIES 9837:8Z4ZW nidx=null parent=7QJYQ]
 + Campanile (Campanilopa) cornucopiae (J. Sowerby, 1818) [SYNONYM SPECIES 9839:9G8BK nidx=null parent=7QJYQ]
Camptomorphoides bohlsi
 - Camptomorphoides bohlsi (Attems, 1898) [SYNONYM SPECIES 9837:8MXJJ nidx=null parent=8NB7M]
 + Camptomorphoides bohlsi (Attems, 1931) [SYNONYM SPECIES 9839:9G4BB nidx=null parent=8NB7M]
Campylaea (Cattania) trizona
 - Campylaea (Cattania) trizona (Rossmässler, 1834) [SYNONYM SPECIES 9837:7QK28 nidx=null parent=RWBC]
 + Campylaea (Cattania) trizona (Rossmässler, 1835) [SYNONYM SPECIES 9839:9G4BD nidx=null parent=RWBC]
Campylaea trizona
 - Campylaea trizona (Rossmässler, 1834) [SYNONYM SPECIES 9837:7QK2J nidx=null parent=RWBC]
 + Campylaea trizona (Rossmässler, 1835) [SYNONYM SPECIES 9839:9G4BC nidx=null parent=RWBC]
Cancellaria gracilior
 - Cancellaria gracilior Carpenter in Gabb, 1869 [SYNONYM SPECIES 9837:QK2X nidx=null parent=654VP]
 + Cancellaria gracilior Carpenter, 1868 [SYNONYM SPECIES 9839:9G4BF nidx=null parent=9G424]
Cancer fornicatus
 - Cancer fornicatus Fabricius, 1782 [SYNONYM SPECIES 9837:5X9RT nidx=null parent=ZYYP]
 + Cancer fornicatus Fabricius, 1781 [SYNONYM SPECIES 9839:5WY3T nidx=null parent=9G4JH]
Candacia tuberculata
 - Candacia tuberculata Wolfenden, 1905 [ACCEPTED SPECIES 9837:QKSM nidx=null]
 + Candacia tuberculata Wolfenden, 1906 [ACCEPTED SPECIES 9839:9G4BK nidx=null]
Canestriniidae
 - Canestriniidae [ACCEPTED FAMILY 9837:7NT nidx=null]
 + Canestriniidae Berlese, 1884 [ACCEPTED FAMILY 9839:9G6YD nidx=null]
Canolira oestroides
 - Canolira oestroides Risso, 1826 [SYNONYM SPECIES 9837:5X9TH nidx=null parent=SQG9]
 + Canolira oestroides Risso, 1827 [SYNONYM SPECIES 9839:9G4BM nidx=null parent=9G4CQ]
Cantharus (Eocantharus) latus
 - Cantharus (Eocantharus) latus (Sowerby J., 1813) [SYNONYM SPECIES 9837:8ZFHQ nidx=null parent=8YM9G]
 + Cantharus (Eocantharus) latus (J. Sowerby, 1813) [SYNONYM SPECIES 9839:9GCMB nidx=null parent=9GBXV]
Cantharus iostoma
 - Cantharus iostoma (Gray, 1834) [SYNONYM SPECIES 9837:5X9FJ nidx=null parent=4MQFD]
 + Cantharus iostoma (J. E. Gray, 1833) [SYNONYM SPECIES 9839:9G4BN nidx=null parent=4MQFD]
Carabdytini
 - Carabdytini Pederzani, 1995 [SYNONYM TRIBE 9837:8KTQS nidx=null parent=KQM]
 + Carabdytini Pederzani, 1995 [SYNONYM TRIBE 9839:9G6Z4 nidx=null parent=KQM]
Carabhydrini
 - Carabhydrini Watts, 1978 [SYNONYM TRIBE 9837:8KTQT nidx=null parent=8LZSG]
 + Carabhydrini Watts, 1978 [SYNONYM TRIBE 9839:9G6Z5 nidx=null parent=8LZSG]
Caracanthus unipinna
 - Caracanthus unipinna (Gray, 1831) [ACCEPTED SPECIES 9837:9CPXH nidx=null]
 + Caracanthus unipinna (Gray, 1831) [ACCEPTED SPECIES 9839:9G4BQ nidx=null]
Cardiomya pectinata
 - Cardiomya pectinata (Carpenter, 1865) [ACCEPTED SPECIES 9837:R5KH nidx=null]
 + Cardiomya pectinata (P. P. Carpenter, 1864) [ACCEPTED SPECIES 9839:9G4BV nidx=null]
Cardisoma aspasia
 - Cardisoma aspasia Adams in Belcher, 1848 [SYNONYM SPECIES 9837:5WZB8 nidx=null parent=68ZB8]
 + Cardisoma aspasia Adams, 1847 [SYNONYM SPECIES 9839:9G4BX nidx=null parent=68ZB8]
Cardium parasitum
 - Cardium parasitum Costa O.G., 1839 [SYNONYM SPECIES 9837:R6D6 nidx=null parent=75T9Q]
 + Cardium parasitum O. G. Costa, 1839 [SYNONYM SPECIES 9839:9G4C2 nidx=null parent=75T9Q]
Cardium umbonatum
 - Cardium umbonatum Wood S., 1850 [SYNONYM SPECIES 9837:R6GH nidx=null parent=SKNH]
 + Cardium umbonatum S. V. Wood, 1850 [SYNONYM SPECIES 9839:9G4C3 nidx=null parent=SKNH]
Carpoglyphidae
 - Carpoglyphidae [ACCEPTED FAMILY 9837:7RP nidx=null]
 + Carpoglyphidae Oudemans, 1923 [ACCEPTED FAMILY 9839:9G262 nidx=null]
Caryophyllia europaea
 - Caryophyllia europaea Risso, 1826 [SYNONYM SPECIES 9837:5XDJQ nidx=null parent=KG2D]
 + Caryophyllia europaea Risso, 1827 [SYNONYM SPECIES 9839:9G4C5 nidx=null parent=9G47Y]
Caryophyllia fasciculata
 - Caryophyllia fasciculata Risso, 1826 [AMBIGUOUS_SYNONYM SPECIES 9837:9B3NB nidx=null parent=55Z7Y]
 + Caryophyllia fasciculata Risso, 1827 [SYNONYM SPECIES 9839:9G8D5 nidx=null parent=55Z7Y]
Caryophyllia pygmaea
 - Caryophyllia pygmaea Risso, 1826 [SYNONYM SPECIES 9837:5XDJW nidx=null parent=448BM]
 + Caryophyllia pygmaea Risso, 1827 [SYNONYM SPECIES 9839:9G4C6 nidx=null parent=9G5G2]
Casella maccarthyi
 - Casella maccarthyi (Kelaart, 1859) [SYNONYM SPECIES 9837:RKC9 nidx=null parent=37DBX]
 + Casella maccarthyi (Kelaart, 1858) [SYNONYM SPECIES 9839:9G4C7 nidx=null parent=37DBX]
Catriona perca
 - Catriona perca Marcus Er., 1958 [SYNONYM SPECIES 9837:RW9S nidx=null parent=32MSC]
 + Catriona perca Er. Marcus, 1958 [SYNONYM SPECIES 9839:9G4CC nidx=null parent=32MSC]
Cerastoderma concameratum
 - Cerastoderma concameratum (Hölzl, 1958) [ACCEPTED SPECIES 9837:8KDY6 nidx=null]
 + Cerastoderma concameratum (Hölzl, 1957) [ACCEPTED SPECIES 9839:9G8DW nidx=null]
Ceratothoa oestroides
 - Ceratothoa oestroides (Risso, 1826) [ACCEPTED SPECIES 9837:SQG9 nidx=null]
 + Ceratothoa oestroides (Risso, 1827) [ACCEPTED SPECIES 9839:9G4CQ nidx=null]
Ceratotrochus (Edwardsotrochus)
 - Ceratotrochus (Edwardsotrochus) Chevalier, 1962 [ACCEPTED SUBGENUS 9837:862XQ nidx=null]
 + Ceratotrochus (Edwardsotrochus) Chevalier, 1961 [ACCEPTED SUBGENUS 9839:9G7Z6 nidx=null]
Cerithiopsis valeriae
 - Cerithiopsis valeriae Giusti Fr., 1987 [SYNONYM SPECIES 9837:69LFT nidx=null parent=49FVS]
 + Cerithiopsis valeriae Fr. Giusti, 1987 [SYNONYM SPECIES 9839:9G4CS nidx=null parent=9G5MM]
Cerithium funatum
 - Cerithium funatum Sowerby J., 1814 [SYNONYM SPECIES 9837:8ZHLW nidx=null parent=8YMC4]
 + Cerithium funatum J. Sowerby, 1814 [SYNONYM SPECIES 9839:9GCMW nidx=null parent=9GBXW]
Chaetodactylidae
 - Chaetodactylidae [ACCEPTED FAMILY 9837:7YM nidx=null]
 + Chaetodactylidae Zachvatkin, 1941 [ACCEPTED FAMILY 9839:9G6YF nidx=null]
Chaetodon rafflesii
 - Chaetodon rafflesii Anonymous [Bennett] , 1830 [ACCEPTED SPECIES 9837:9CQ3C nidx=null]
 + Chaetodon rafflesii Anonymous [Bennett] , 1830 [ACCEPTED SPECIES 9839:9G4D3 nidx=null]
Chalumalna
 - Chalumalna Boulard, 1998 [ACCEPTED GENUS 9837:8HDNC nidx=null]
 + Chalumalna Boulard, 2001 [ACCEPTED GENUS 9839:9G7NP nidx=null]
Chalumalna martinensis
 - Chalumalna martinensis Boulard, 1998 [ACCEPTED SPECIES 9837:THKL nidx=null]
 + Chalumalna martinensis Boulard, 2001 [ACCEPTED SPECIES 9839:9G8FG nidx=null]
Chambardia wahlbergi welwitschi
 - Chambardia wahlbergi welwitschi (Morelet, 1867) [SYNONYM SUBSPECIES 9837:5GDHC nidx=null parent=TLK3]
 + Chambardia wahlbergi welwitschi [sic] [SYNONYM SUBSPECIES 9839:9G6P8 nidx=null parent=TLK3]
Charopa
 - Charopa Albers, 1860 [ACCEPTED GENUS 9837:7NYD4 nidx=null]
 + Charopa E. von Martens, 1860 [ACCEPTED GENUS 9839:9G38V nidx=null]
Charpentieria itala itala
 - Charpentieria itala itala (G. v. Martens, 1824) [ACCEPTED SUBSPECIES 9837:7TRVM nidx=null]
 + Charpentieria itala itala (G. von Martens, 1824) [ACCEPTED SUBSPECIES 9839:9G6P9 nidx=null]
Cheiragonus acutidens
 - Cheiragonus acutidens Stimpson, 1848 [SYNONYM SPECIES 9837:TTHL nidx=null parent=558M3]
 + Cheiragonus acutidens Stimpson, 1858 [SYNONYM SPECIES 9839:9G4DB nidx=null parent=9G6D7]
Chicoreus cnissodus ceylonensis
 - Chicoreus cnissodus ceylonensis Houart, 2015 [ACCEPTED SUBSPECIES 9837:8SXZP nidx=null]
 + Chicoreus cnissodus ceylonensis Houart, 2015 [SYNONYM SUBSPECIES 9839:7JJVN nidx=null parent=9GJQ3]
Chicoreus cnissodus cnissodus
 - Chicoreus cnissodus cnissodus (Euthyme, 1889) [ACCEPTED SUBSPECIES 9837:8SXZQ nidx=null]
 + Chicoreus cnissodus cnissodus (Euthyme, 1889) [SYNONYM SUBSPECIES 9839:7JK7N nidx=null parent=TZF7]
Chilecicadini
 - Chilecicadini Sanborn, 2014 [ACCEPTED TRIBE 9837:8JK6S nidx=null]
 + Chilecicadini Sanborn, 2014 [ACCEPTED TRIBE 9839:9G6Z6 nidx=null]
Chiton (Sclerochiton) miles
 - Chiton (Sclerochiton) miles Carpenter in Pilsbry, 1893 [SYNONYM SPECIES 9837:5XTYN nidx=null parent=6ZFTM]
 + Chiton (Sclerochiton) miles Pilsbry, 1893 [SYNONYM SPECIES 9839:9G4DG nidx=null parent=9G69L]
Chiton arcticus
 - Chiton arcticus (Sars G. O., 1878) [SYNONYM SPECIES 9837:5XTYV nidx=null parent=3TLVT]
 + Chiton arcticus (G. O. Sars, 1878) [SYNONYM SPECIES 9839:9G4DH nidx=null parent=9G57L]
Chiton lindholmii
 - Chiton lindholmii Schrenck, 1862 [SYNONYM SPECIES 9837:9CQ47 nidx=null parent=523NP]
 + Chiton lindholmii Schrenck, 1863 [SYNONYM SPECIES 9839:9G4DJ nidx=null parent=523NP]
Chloraea constricta undina
 - Chloraea constricta undina (L. Pfeiffer, 1866) [SYNONYM SUBSPECIES 9837:7TRX8 nidx=null parent=7QNLF]
 + Chloraea constricta undina (L. Pfeiffer, 1856) [SYNONYM SUBSPECIES 9839:9G9M6 nidx=null parent=7QNLF]
Chlorita (Artemisiella)
 - Chlorita (Artemisiella) Zachvatkin, 1953 [ACCEPTED SUBGENUS 9837:8JMHD nidx=null]
 + Chlorita (Artemisiella) Zakhvatkin, 1953 [ACCEPTED SUBGENUS 9839:9G2VQ nidx=null]
Chlorita (Artemisiella) krasheninnikovi
 - Chlorita (Artemisiella) krasheninnikovi Zachvatkin, 1953 [ACCEPTED SPECIES 9837:69WD9 nidx=null]
 + Chlorita (Artemisiella) krasheninnikovi Zakhvatkin, 1953 [ACCEPTED SPECIES 9839:9G4M6 nidx=null]
Chlorita (Chlorita) oshanini
 - Chlorita (Chlorita) oshanini Zachvatkin, 1953 [ACCEPTED SPECIES 9837:5Y8DX nidx=null]
 + Chlorita (Chlorita) oshanini Zakhvatkin, 1953 [ACCEPTED SPECIES 9839:9G4MC nidx=null]
Chlorita (Eremochlorita)
 - Chlorita (Eremochlorita) Zachvatkin, 1946 [ACCEPTED SUBGENUS 9837:8JMHK nidx=null]
 + Chlorita (Eremochlorita) Zakhvatkin, 1946 [ACCEPTED SUBGENUS 9839:9G7Z7 nidx=null]
Chlorita (Eremochlorita) akdzhusani
 - Chlorita (Eremochlorita) akdzhusani (Zachvatkin, 1953) [ACCEPTED SPECIES 9837:5XWFP nidx=null]
 + Chlorita (Eremochlorita) akdzhusani (Zakhvatkin, 1953) [ACCEPTED SPECIES 9839:9G4M2 nidx=null]
Chlorita (Eremochlorita) arenicola
 - Chlorita (Eremochlorita) arenicola Zachvatkin, 1946 [ACCEPTED SPECIES 9837:5XWG2 nidx=null]
 + Chlorita (Eremochlorita) arenicola Zakhvatkin, 1946 [ACCEPTED SPECIES 9839:9G4M3 nidx=null]
Chlorita (Eremochlorita) korovini
 - Chlorita (Eremochlorita) korovini Zachvatkin, 1953 [ACCEPTED SPECIES 9837:5XWFM nidx=null]
 + Chlorita (Eremochlorita) korovini Zakhvatkin, 1953 [ACCEPTED SPECIES 9839:9G4M5 nidx=null]
Chlorita (Eremochlorita) popovi
 - Chlorita (Eremochlorita) popovi Zachvatkin, 1953 [ACCEPTED SPECIES 9837:5XWF7 nidx=null]
 + Chlorita (Eremochlorita) popovi Zakhvatkin, 1953 [ACCEPTED SPECIES 9839:9G4MD nidx=null]
Chlorita (Eremochlorita) uvaroviana
 - Chlorita (Eremochlorita) uvaroviana Zachvatkin, 1946 [ACCEPTED SPECIES 9837:5XWF9 nidx=null]
 + Chlorita (Eremochlorita) uvaroviana Zakhvatkin, 1946 [ACCEPTED SPECIES 9839:9G4MG nidx=null]
Chlorita (Xerochlorita)
 - Chlorita (Xerochlorita) Zachvatkin, 1953 [SYNONYM SUBGENUS 9837:8JMHL nidx=null parent=9CHYF]
 + Chlorita (Xerochlorita) Zakhvatkin, 1953 [SYNONYM SUBGENUS 9839:9G7Z9 nidx=null parent=9G7Z7]
Chloëcharis rufula
 - Chloëcharis rufula Lynch Arribálzaga, 1884 [SYNONYM SPECIES 9837:5XYXS nidx=null parent=6N2SH]
 + Chloëcharis rufula Lynch Arribálzaga, 1884 [SYNONYM SPECIES 9839:9G8B3 nidx=null parent=6N2SH]
Chondropoma (Chondropomium) kuesteri
 - Chondropoma (Chondropomium) kuesteri (L. Pfeiffer, 1851) [SYNONYM SPECIES 9837:7QNVS nidx=null parent=7RH5S]
 + Chondropoma (Chondropomium) kuesteri (L. Pfeiffer, 1852) [SYNONYM SPECIES 9839:9G4DT nidx=null parent=7RH5S]
Chromagaster tenuilaima
 - Chromagaster tenuilaima Allgén, 1929 [SYNONYM SPECIES 9837:9BCGG nidx=null parent=8FTKC]
 + Chromagaster tenuilaima (Allgén, 1929) Wieser, 1956 [SYNONYM SPECIES 9839:9GC9V nidx=null parent=8FTKC]
Chromagaster zostericola
 - Chromagaster zostericola Allgén, 1929 [SYNONYM SPECIES 9837:9BCGH nidx=null parent=8FTKC]
 + Chromagaster zostericola (Allgén, 1929) Wieser, 1956 [SYNONYM SPECIES 9839:9GC9W nidx=null parent=8FTKC]
Chromodoris albolimbata
 - Chromodoris albolimbata Bergh, 1908 [ACCEPTED SPECIES 9837:5YHJC nidx=null]
 + Chromodoris albolimbata Bergh, 1907 [ACCEPTED SPECIES 9839:9G4F5 nidx=null]
Chromodoris euelpis
 - Chromodoris euelpis Bergh, 1908 [ACCEPTED SPECIES 9837:5YHL7 nidx=null]
 + Chromodoris euelpis Bergh, 1907 [ACCEPTED SPECIES 9839:9G4F6 nidx=null]
Chromodoris marenzelleri
 - Chromodoris marenzelleri Bergh, 1888 [SYNONYM SPECIES 9837:5YHN4 nidx=null parent=3P33F]
 + Chromodoris marenzelleri Bergh, 1882 [SYNONYM SPECIES 9839:9G4F7 nidx=null parent=3P33F]
Chunrocerus
 - Chunrocerus Zachvatkin, 1946 [SYNONYM GENUS 9837:8JKWC nidx=null parent=8HKVK]
 + Chunrocerus Zakhvatkin, 1946 [SYNONYM GENUS 9839:9G7NR nidx=null parent=8HKVK]
Chunroides knighti
 - Chunroides knighti Maldonado-Capriles, 1974 [ACCEPTED SPECIES 9837:V3NC nidx=null]
 + Chunroides knighti Maldonado Capriles, 1975 [ACCEPTED SPECIES 9839:9G4N6 nidx=null]
Cicada (Huechys) sanguinea
 - Cicada (Huechys) sanguinea DeGeer, 1773 [SYNONYM SPECIES 9837:8HXYX nidx=null parent=8JJKB]
 + Cicada (Huechys) sanguinea De Geer, 1773 [SYNONYM SPECIES 9839:V67D nidx=null parent=9G9MX]
Cicada (Taphura) nitida
 - Cicada (Taphura) nitida DeGeer, 1773 [SYNONYM SPECIES 9837:8HXZ8 nidx=null parent=54SP4]
 + Cicada (Taphura) nitida De Geer, 1773 [SYNONYM SPECIES 9839:9G8HF nidx=null parent=9G9HP]
Cicada eristata
 - Cicada eristata Melichar, 1924 [SYNONYM SPECIES 9837:8HY66 nidx=null parent=4MP2M]
 + Cicada eristata Fabricius, 1803 [SYNONYM SPECIES 9839:V5NL nidx=null parent=4MP2M]
Cicada filirostris
 - Cicada filirostris DeGeer, 1773 [SYNONYM SPECIES 9837:V5PK nidx=null parent=4RKN7]
 + Cicada filirostris De Geer, 1773 [SYNONYM SPECIES 9839:9G4N8 nidx=null parent=4RKN7]
Cicada lyricea
 - Cicada lyricea DeGeer, 1773 [SYNONYM SPECIES 9837:8KJKG nidx=null parent=8K2K8]
 + Cicada lyricea (De Geer, 1773) [SYNONYM SPECIES 9839:9G8HL nidx=null parent=9G8M6]
Cicada lyricen
 - Cicada lyricen DeGeer, 1773 [SYNONYM SPECIES 9837:V5VT nidx=null parent=46V9Z]
 - Cicada lyricen DeGeer, 1773 [SYNONYM SPECIES 9837:8HY9T nidx=null parent=8K2K8]
 + Cicada lyricen De Geer, 1773 [SYNONYM SPECIES 9839:9G8HM nidx=null parent=9G85N]
Cicada marginata
 - Cicada marginata DeGeer, 1773 [AMBIGUOUS_SYNONYM SPECIES 9837:V5WH nidx=null parent=5YSZK]
 + Cicada marginata De Geer, 1773 [AMBIGUOUS_SYNONYM SPECIES 9839:9G4N9 nidx=null parent=5YSZK]
Cicada musciformis
 - Cicada musciformis DeGeer, 1773 [SYNONYM SPECIES 9837:V5XV nidx=null parent=4SY4Y]
 + Cicada musciformis De Geer, 1773 [SYNONYM SPECIES 9839:9G4NB nidx=null parent=4SY4Y]
Cicada nigra
 - Cicada nigra DeGeer, 1773 [AMBIGUOUS_SYNONYM SPECIES 9837:8HYBX nidx=null parent=4JW2L]
 + Cicada nigra (De Geer, 1773) [AMBIGUOUS_SYNONYM SPECIES 9839:9G4NC nidx=null parent=4JW2L]
Cicada nigro-linea
 - Cicada nigro-linea DeGeer, 1773 [SYNONYM SPECIES 9837:8TP2M nidx=null parent=4JW2L]
 + Cicada nigro-linea De Geer, 1773 [SYNONYM SPECIES 9839:9G8HP nidx=null parent=4JW2L]
Cicada nigrolinea
 - Cicada nigrolinea DeGeer, 1773 [SYNONYM SPECIES 9837:8SYKN nidx=null parent=4JW2L]
 + Cicada nigrolinea De Geer, 1773 [SYNONYM SPECIES 9839:9G8HN nidx=null parent=4JW2L]
Cicada nigrolineata
 - Cicada nigrolineata DeGeer, 1773 [SYNONYM SPECIES 9837:8HYC2 nidx=null parent=4JW2L]
 + Cicada nigrolineata (De Geer, 1773) [SYNONYM SPECIES 9839:9G8HQ nidx=null parent=4JW2L]
Cicada nitida
 - Cicada nitida DeGeer, 1773 [SYNONYM SPECIES 9837:V5YP nidx=null parent=54SP4]
 + Cicada nitida De Geer, 1773 [SYNONYM SPECIES 9839:9G8HG nidx=null parent=9G9HP]
Cicada ocella
 - Cicada ocella DeGeer, 1773 [SYNONYM SPECIES 9837:8HYCG nidx=null parent=3JJKX]
 + Cicada ocella (De Geer, 1773) [SYNONYM SPECIES 9839:9G8HR nidx=null parent=3JJKX]
Cicada ocellata
 - Cicada ocellata DeGeer, 1773 [AMBIGUOUS_SYNONYM SPECIES 9837:V5ZC nidx=null parent=3JJKX]
 + Cicada ocellata De Geer, 1773 [AMBIGUOUS_SYNONYM SPECIES 9839:9G8HS nidx=null parent=3JJKX]
Cicada sanguinea
 - Cicada sanguinea DeGeer, 1773 [AMBIGUOUS_SYNONYM SPECIES 9837:V67F nidx=null parent=3MSPQ]
 - Cicada sanguinea DeGeer, 1773 [AMBIGUOUS_SYNONYM SPECIES 9837:8HYGX nidx=null parent=8JJKB]
 + Cicada sanguinea De Geer, 1773 [AMBIGUOUS_SYNONYM SPECIES 9839:V5CC nidx=null parent=9G7ZL]
Cicada triangularis
 - Cicada triangularis Fabricius, 1794 [SYNONYM SPECIES 9837:8HYKF nidx=null parent=49JBV]
 + Cicada triangularis Fabricius, 1803 [SYNONYM SPECIES 9839:V6C7 nidx=null parent=3MD65]
Cicada trifaciata
 - Cicada trifaciata DeGeer, 1773 [SYNONYM SPECIES 9837:8RS48 nidx=null parent=4JJ5R]
 + Cicada trifaciata (De Geer, 1773) [SYNONYM SPECIES 9839:9G8HW nidx=null parent=4JJ5R]
Cicada trifasciata
 - Cicada trifasciata DeGeer, 1773 [AMBIGUOUS_SYNONYM SPECIES 9837:8RH69 nidx=null parent=4JJ5R]
 + Cicada trifasciata De Geer, 1773 [AMBIGUOUS_SYNONYM SPECIES 9839:9G8HX nidx=null parent=4JJ5R]
Cicada undata
 - Cicada undata Fabricius, 1794 [AMBIGUOUS_SYNONYM SPECIES 9837:V6D3 nidx=null parent=6SN4R]
 - Cicada undata DeGeer, 1773 [AMBIGUOUS_SYNONYM SPECIES 9837:8R89W nidx=null parent=8RMW2]
 + Cicada undata De Geer, 1773 [AMBIGUOUS_SYNONYM SPECIES 9839:9G4ND nidx=null parent=9G6TN]
Cicada vitrea
 - Cicada vitrea Germar, 1830 [AMBIGUOUS_SYNONYM SPECIES 9837:8HYLB nidx=null parent=8R3HZ]
 + Cicada vitrea (Brullé, 1832) [AMBIGUOUS_SYNONYM SPECIES 9839:9G8HY nidx=null parent=V6G4]
Cicadae
 - Cicadae Berthold, 1827 [SYNONYM SUBTRIBE 9837:8RGCY nidx=null parent=8R3RN]
 + Cicadae Batsch, 1789 [SYNONYM SUBTRIBE 9839:9G7LX nidx=null parent=9G7M7]
Cicadaria
 - Cicadaria Berthold, 1827 [SYNONYM SUBTRIBE 9837:8RGCZ nidx=null parent=8R3RN]
 + Cicadaria Batsch, 1789 [SYNONYM SUBTRIBE 9839:9G7LY nidx=null parent=9G7M7]
Cicadataria
 - Cicadataria Berthold, 1827 [SYNONYM SUBTRIBE 9837:8RGD2 nidx=null parent=8R3RN]
 + Cicadataria Batsch, 1789 [SYNONYM SUBTRIBE 9839:9G7LZ nidx=null parent=9G7M7]
Cicadella pavlovskii
 - Cicadella pavlovskii (Zachvatkin, 1947) [SYNONYM SPECIES 9837:8HYV2 nidx=null parent=3CYPX]
 + Cicadella pavlovskii (Zakhvatkin, 1947) [SYNONYM SPECIES 9839:9G4NF nidx=null parent=9G5DP]
Cicadellites theobaldi
 - Cicadellites theobaldi Piton, 1940 [ACCEPTED SPECIES 9837:8JR4K nidx=null]
 + Cicadellites theobaldi Piton, 1935 [ACCEPTED SPECIES 9839:9G8J3 nidx=null]
Cicadiae
 - Cicadiae Berthold, 1827 [SYNONYM SUBTRIBE 9837:8RGD3 nidx=null parent=8R3RN]
 + Cicadiae Batsch, 1789 [SYNONYM SUBTRIBE 9839:9G7M3 nidx=null parent=9G7M7]
Cicadidae
 - Cicadidae Berthold, 1827 [SYNONYM SUBTRIBE 9837:8R3HY nidx=null parent=8R3RN]
 - Cicadidae Berthold, 1827 [ACCEPTED FAMILY 9837:8R3HZ nidx=null]
 + Cicadidae Batsch, 1789 [ACCEPTED FAMILY 9839:9FZZK nidx=null]
 + Cicadidae Batsch, 1789 [SYNONYM SUBTRIBE 9839:9FZZL nidx=null parent=9G7M7]
Cicadide
 - Cicadide Berthold, 1827 [SYNONYM SUBTRIBE 9837:8RGD4 nidx=null parent=8R3RN]
 + Cicadide Batsch, 1789 [SYNONYM SUBTRIBE 9839:9G7M4 nidx=null parent=9G7M7]
Cicadides
 - Cicadides Latreille, 1802 [SYNONYM SUBTRIBE 9837:8JKJG nidx=null parent=8R3RN]
 + Cicadides Batsch, 1789 [SYNONYM SUBTRIBE 9839:9G7M5 nidx=null parent=9G7M7]
Cicadina
 - Cicadina Berthold, 1827 [SYNONYM SUBTRIBE 9837:8R3RM nidx=null parent=8R3RN]
 - Cicadina Berthold, 1827 [ACCEPTED SUBTRIBE 9837:8R3RN nidx=null]
 + Cicadina Batsch, 1789 [SYNONYM SUBTRIBE 9839:9G7M6 nidx=null parent=9G7M7]
 + Cicadina Batsch, 1789 [ACCEPTED SUBTRIBE 9839:9G7M7 nidx=null]
Cicadinae
 - Cicadinae Berthold, 1827 [SYNONYM SUBTRIBE 9837:8R3KV nidx=null parent=8R3RN]
 + Cicadinae Batsch, 1789 [SYNONYM SUBTRIBE 9839:9G6YN nidx=null parent=9G7M7]
Cicadini
 - Cicadini Berthold, 1827 [SYNONYM SUBTRIBE 9837:8R3P6 nidx=null parent=8R3RN]
 + Cicadini Batsch, 1789 [SYNONYM SUBTRIBE 9839:9G6Z7 nidx=null parent=9G7M7]
Cicadoidea
 - Cicadoidea Berthold, 1827 [ACCEPTED SUPERFAMILY 9837:8R3GV nidx=null]
 + Cicadoidea Batsch, 1789 [ACCEPTED SUPERFAMILY 9839:4Y7 nidx=null]
Cicadula ramigera
 - Cicadula ramigera Zachvatkin, 1933 [SYNONYM SPECIES 9837:8JN33 nidx=null parent=8JWBG]
 + Cicadula ramigera Zakhvatkin, 1933 [SYNONYM SPECIES 9839:9G8B4 nidx=null parent=8JWBG]
Cicadula septemnotata
 - Cicadula septemnotata Kuntze, 1937 non Fallén, 1806 [AMBIGUOUS_SYNONYM SPECIES 9837:8HZ8T nidx=null parent=3CYQM]
 + Cicadula septemnotata (Fallén, 1806) [AMBIGUOUS_SYNONYM SPECIES 9839:9G4NH nidx=null parent=8JWBQ]
 + Cicadula septemnotata (Fallén, 1806) [AMBIGUOUS_SYNONYM SPECIES 9839:9G4NJ nidx=null parent=8JWBQ]
Cicididae
 - Cicididae Berthold, 1827 [SYNONYM SUBTRIBE 9837:8RGD5 nidx=null parent=8R3RN]
 + Cicididae Batsch, 1789 [SYNONYM SUBTRIBE 9839:9G7M8 nidx=null parent=9G7M7]
Cinguloterebra fernandae
 - Cinguloterebra fernandae (Aubry, 1991) [SYNONYM SPECIES 9837:7QP9C nidx=null parent=7TBZG]
 + Cinguloterebra fernandae (Aubry, 1995) [SYNONYM SPECIES 9839:9G4FK nidx=null parent=9G9HT]
Circular
 - Circular Zachvatkin, 1935 [SYNONYM GENUS 9837:8RQXR nidx=null parent=8RH3C]
 + Circular Zakhvatkin, 1935 [SYNONYM GENUS 9839:9G7NV nidx=null parent=8CLV]
Circulifer
 - Circulifer Zachvatkin, 1935 [SYNONYM GENUS 9837:8R45H nidx=null parent=8RH3C]
 + Circulifer Zakhvatkin, 1935 [SYNONYM GENUS 9839:9G73Y nidx=null parent=8CLV]
Circulifer chinai arabicus
 - Circulifer chinai arabicus Zachvatkin, 1946 [SYNONYM INFRASPECIFIC_NAME 9837:8RSQ5 nidx=null parent=8RM5L]
 + Circulifer chinai arabicus Zakhvatkin, 1946 [SYNONYM INFRASPECIFIC_NAME 9839:9G9L6 nidx=null parent=9G9C7]
Circulifer chinai caspius
 - Circulifer chinai caspius Zachvatkin, 1946 [SYNONYM SUBSPECIES 9837:8RPBV nidx=null parent=7HJSL]
 + Circulifer chinai caspius Zakhvatkin, 1946 [SYNONYM SUBSPECIES 9839:9G9M7 nidx=null parent=9G7NC]
Circulifer chinai jenjouriste
 - Circulifer chinai jenjouriste Zachvatkin, 1946 [SYNONYM INFRASPECIFIC_NAME 9837:8RRT4 nidx=null parent=8RM5M]
 + Circulifer chinai jenjouriste Zakhvatkin, 1946 [SYNONYM INFRASPECIFIC_NAME 9839:9G9L7 nidx=null parent=9G9C8]
Cladangia aquitaniensis
 - Cladangia aquitaniensis Chevalier, 1962 [ACCEPTED SPECIES 9837:863G7 nidx=null]
 + Cladangia aquitaniensis Chevalier, 1961 [ACCEPTED SPECIES 9839:9G8JM nidx=null]
Cladocora gamachotensis
 - Cladocora gamachotensis Chevalier, 1962 [SYNONYM SPECIES 9837:85NST nidx=null parent=863GG]
 + Cladocora gamachotensis Chevalier, 1961 [SYNONYM SPECIES 9839:9G4FP nidx=null parent=863GG]
Clarias nieuhofii
 - Clarias nieuhofii Valenciennes, 1840 [ACCEPTED SPECIES 9837:VRDW nidx=null]
 + Clarias nieuhofii Valenciennes, 1840 [ACCEPTED SPECIES 9839:9G4FR nidx=null]
Clathurella nigrocincta
 - Clathurella nigrocincta (Montrouzier, 1873) [SYNONYM SPECIES 9837:7QPKL nidx=null parent=6Q9L9]
 + Clathurella nigrocincta (Montrouzier, 1872) [SYNONYM SPECIES 9839:9G8JR nidx=null parent=6Q9L9]
Clavatula taxus
 - Clavatula taxus [SYNONYM SPECIES 9837:7QQHL nidx=null parent=VV5T]
 + Clavatula taxus [sic] [SYNONYM SPECIES 9839:9G4FX nidx=null parent=VV5T]
Clavus maravignae
 - Clavus maravignae (Bivona Ant. in Bivona And., 1838) [SYNONYM SPECIES 9837:VWFG nidx=null parent=Z6YL]
 + Clavus maravignae (Ant. Bivona, 1838) [SYNONYM SPECIES 9839:9G4FY nidx=null parent=9G4J5]
Cleopatra arambourgi
 - Cleopatra arambourgi Roger, 1944 [ACCEPTED SPECIES 9837:7QQK2 nidx=null]
 + Cleopatra arambourgi Roger, 1943 [ACCEPTED SPECIES 9839:9G4FZ nidx=null]
Clistocoeloma merguiensis
 - Clistocoeloma merguiensis De Man, 1888 [SYNONYM SPECIES 9837:84GRV nidx=null parent=5YZJF]
 + Clistocoeloma merguiensis De Man, 1888 [SYNONYM SPECIES 9839:9G4G3 nidx=null parent=5YZJF]
Cochlostyla (Prochilus) fischeri
 - Cochlostyla (Prochilus) fischeri Hidalgo, 1889 [SYNONYM SPECIES 9837:7QRCQ nidx=null parent=7R4LK]
 + Cochlostyla (Prochilus) fischeri Hidalgo, 1890 [SYNONYM SPECIES 9839:9G8K6 nidx=null parent=7R4LK]
Cochlostyla albaiensis
 - Cochlostyla albaiensis (G. B. Sowerby I, 1840) [SYNONYM SPECIES 9837:7QRDB nidx=null parent=7QJM4]
 + Cochlostyla albaiensis (G. B. Sowerby I, 1841) [SYNONYM SPECIES 9839:9G8K3 nidx=null parent=7QJM4]
Cochlostyla chrysalidiformis
 - Cochlostyla chrysalidiformis (G. B. Sowerby I, 1841) [SYNONYM SPECIES 9837:7QRG5 nidx=null parent=7QP66]
 + Cochlostyla chrysalidiformis (G. B. Sowerby I, 1833) [SYNONYM SPECIES 9839:9G8K4 nidx=null parent=7QP66]
Cochlostyla romblonensis
 - Cochlostyla romblonensis (L. Pfeiffer, 1842) [SYNONYM SPECIES 9837:7QRPP nidx=null parent=7RQFY]
 + Cochlostyla romblonensis (L. Pfeiffer, 1843) [SYNONYM SPECIES 9839:9G8K8 nidx=null parent=7RQFY]
Cochlostyla virens
 - Cochlostyla virens (L. Pfeiffer, 1842) [SYNONYM SPECIES 9837:7QRRM nidx=null parent=7TWHL]
 + Cochlostyla virens (L. Pfeiffer, 1843) [SYNONYM SPECIES 9839:9G8K9 nidx=null parent=7TWHL]
Coelatura rukwaensis
 - Coelatura rukwaensis Cox, 1939 [ACCEPTED SPECIES 9837:8ZH5T nidx=null]
 + Coelatura rukwaensis L. R. Cox, 1939 [ACCEPTED SPECIES 9839:9GCMT nidx=null]
Coereba flaveola chloropyga
 - Coereba flaveola chloropyga (Cabanis, 1850) [ACCEPTED SUBSPECIES 9837:5GJQG nidx=null]
 + Coereba flaveola chloropyga (Cabanis, 1851) [ACCEPTED SUBSPECIES 9839:9G7FG nidx=null]
Coereba flaveola guianensis
 - Coereba flaveola guianensis (Cabanis, 1850) [ACCEPTED SUBSPECIES 9837:5GJQP nidx=null]
 + Coereba flaveola guianensis (Cabanis, 1851) [ACCEPTED SUBSPECIES 9839:9G7FH nidx=null]
Coereba flaveola luteola
 - Coereba flaveola luteola (Cabanis, 1850) [ACCEPTED SUBSPECIES 9837:5GJQT nidx=null]
 + Coereba flaveola luteola (Cabanis, 1851) [ACCEPTED SUBSPECIES 9839:9G7FJ nidx=null]
Columbarium pagoda
 - Columbarium pagoda (Lesson, 1831) [ACCEPTED SPECIES 9837:XBJC nidx=null]
 + Columbarium pagoda (Lesson, 1833) [ACCEPTED SPECIES 9839:9G4GF nidx=null]
Columbarium pagoda pagoda
 - Columbarium pagoda pagoda (Lesson, 1831) [SYNONYM SUBSPECIES 9837:7JMV7 nidx=null parent=XBJC]
 + Columbarium pagoda pagoda (Lesson, 1833) [ACCEPTED SUBSPECIES 9839:9G6PG nidx=null]
Columbella gibbosula
 - Columbella gibbosula [SYNONYM SPECIES 9837:XBSS nidx=null parent=4XJKX]
 + Columbella gibbosula [sic] [SYNONYM SPECIES 9839:9G4GK nidx=null parent=4XJKX]
Columbella pumila
 - Columbella pumila Dunker, 1858 [SYNONYM SPECIES 9837:XBZV nidx=null parent=7GBRP]
 + Columbella pumila Dunker, 1860 [SYNONYM SPECIES 9839:9G4GP nidx=null parent=9G6M2]
Cominella (Cominella) delalandii
 - Cominella (Cominella) delalandii Adams & Adams, 1853 [SYNONYM SPECIES 9837:7QS3Q nidx=null parent=NY2X]
 + Cominella (Cominella) delalandii (Kiener, 1834) [SYNONYM SPECIES 9839:9G8L4 nidx=null parent=NY2X]
Conchoecetes pectenicola
 - Conchoecetes pectenicola (Adams in Belcher, 1848) [ACCEPTED SPECIES 9837:84GS3 nidx=null]
 + Conchoecetes pectenicola (Adams, 1847) [SYNONYM SPECIES 9839:9G8L5 nidx=null parent=XKD8]
Conulinus natalensis
 - Conulinus natalensis (F. Krauss in L. Pfeiffer, 1846) [SYNONYM SPECIES 9837:5ZW72 nidx=null parent=3G43R]
 + Conulinus natalensis (L. Pfeiffer, 1846) [SYNONYM SPECIES 9839:9G4H4 nidx=null parent=9G4VT]
Conulinus tumidus
 - Conulinus tumidus J. S. Gibbons in J. W. Taylor, 1977 [SYNONYM SPECIES 9837:5ZW73 nidx=null parent=3G43Z]
 + Conulinus tumidus J. S. Gibbons, 1877 [SYNONYM SPECIES 9839:9G4H5 nidx=null parent=3G43Z]
Conus barbadensis
 - Conus barbadensis Hwass in Bruguière, 1792 [SYNONYM SPECIES 9837:92XLH nidx=null parent=5ZY43]
 + Conus barbadensis Hwass, 1792 [SYNONYM SPECIES 9839:9G4H6 nidx=null parent=5ZY43]
Conus mozambicus mozambicus
 - Conus mozambicus mozambicus Hwass in Bruguière, 1792 [ACCEPTED SUBSPECIES 9837:888W9 nidx=null]
 + Conus mozambicus mozambicus Hwass, 1792 [ACCEPTED SUBSPECIES 9839:7JMJY nidx=null]
Conus nobilis abbai
 - Conus nobilis abbai Poppe & Tagaro, 2011 [ACCEPTED SUBSPECIES 9837:7TSVQ nidx=null]
 + Conus nobilis abbai Poppe & Tagaro, 2011 [SYNONYM SUBSPECIES 9839:7JMK4 nidx=null parent=7QT3R]
Conus nobilis friedae
 - Conus nobilis friedae (da Motta, 1991) [ACCEPTED SUBSPECIES 9837:7TSVR nidx=null]
 + Conus nobilis friedae (da Motta, 1991) [SYNONYM SUBSPECIES 9839:5GLB2 nidx=null parent=9GJKK]
Conus nobilis nobilis
 - Conus nobilis nobilis Linnaeus, 1758 [ACCEPTED SUBSPECIES 9837:7TSVT nidx=null]
 + Conus nobilis nobilis Linnaeus, 1758 [SYNONYM SUBSPECIES 9839:5GLB3 nidx=null parent=XXX4]
Conus regus
 - Conus regus [SYNONYM SPECIES 9837:XY6M nidx=null parent=XY43]
 + Conus regus [sic] [SYNONYM SPECIES 9839:9G4HG nidx=null parent=XY43]
Coralliophila squamosa
 - Coralliophila squamosa (Bivona Ant. in Bivona And., 1838) [SYNONYM SPECIES 9837:5ZZXF nidx=null parent=3M4N7]
 + Coralliophila squamosa (Ant. Bivona, 1838) [SYNONYM SPECIES 9839:9G4HN nidx=null parent=3M4N7]
Corbicula durkeei
 - Corbicula durkeei (Meek, 1870) [SYNONYM SPECIES 9837:8YLTM nidx=null parent=8YPLY]
 + Corbicula durkeei (Meek, 1871) [SYNONYM SPECIES 9839:9GBX2 nidx=null parent=8YPLY]
Corbicula rivalis
 - Corbicula rivalis (Philippi, 1850) [ACCEPTED SPECIES 9837:7QTHT nidx=null]
 + Corbicula rivalis (von dem Busch, 1850) [ACCEPTED SPECIES 9839:9G4HP nidx=null]
Corbicula wicomicoensis
 - Corbicula wicomicoensis H. G. Richards, 1845 [SYNONYM SPECIES 9837:8YJQF nidx=null parent=8YJSZ]
 + Corbicula wicomicoensis H. G. Richards, 1945 [SYNONYM SPECIES 9839:9G9WC nidx=null parent=8YJSZ]
Cordiopsis manca
 - Cordiopsis manca (Braun, 1850) [ACCEPTED SPECIES 9837:992X6 nidx=null]
 + Cordiopsis manca (A. Braun, 1851) [ACCEPTED SPECIES 9839:9GDC7 nidx=null]
Corystes dentatus
 - Corystes dentatus Latreille, 1801 [SYNONYM SPECIES 9837:84DPP nidx=null parent=YSVB]
 + Corystes dentatus (Fabricius, 1793) [SYNONYM SPECIES 9839:9G4HX nidx=null parent=YSVB]
Cosmonotus
 - Cosmonotus [ACCEPTED GENUS 9837:62NQC nidx=null]
 - Cosmonotus White, 1848 [ACCEPTED GENUS 9837:7P4ZZ nidx=null]
 + Cosmonotus Adams, 1847 [ACCEPTED GENUS 9839:9G33K nidx=null]
Cosmonotus grayii
 - Cosmonotus grayii White, 1848 [SYNONYM SPECIES 9837:6B7PG nidx=null parent=6B7PH]
 - Cosmonotus grayii Adams in Belcher, 1848 [ACCEPTED SPECIES 9837:6B7PH nidx=null]
 + Cosmonotus grayii Adams, 1847 [ACCEPTED SPECIES 9839:9G4HZ nidx=null]
Crassopleura maravignae
 - Crassopleura maravignae (Bivona Ant. in Bivona And., 1838) [ACCEPTED SPECIES 9837:Z6YL nidx=null]
 + Crassopleura maravignae (Ant. Bivona, 1838) [ACCEPTED SPECIES 9839:9G4J5 nidx=null]
Crenitis protuberans
 - Crenitis protuberans Jia, Feng-Long, 1996 [SYNONYM SPECIES 9837:ZCPN nidx=null parent=ZCN2]
 + Crenitis protuberans Jia, Feng-Long, 1996 [SYNONYM SPECIES 9839:9G8M5 nidx=null parent=ZCN2]
Crepidula nautiloides
 - Crepidula nautiloides Lesson, 1832 [SYNONYM SPECIES 9837:6BG9Y nidx=null parent=6BFYV]
 + Crepidula nautiloides Lesson, 1833 [SYNONYM SPECIES 9839:9G4J7 nidx=null parent=6BFYV]
Cretacoelidia
 - Cretacoelidia [ACCEPTED GENUS 9837:8RV3T nidx=null]
 + Cretacoelidia Wang, Dietrich & Zhang, 2018 [ACCEPTED GENUS 9839:9G7PK nidx=null]
Cryptocnemus chinensis
 - Cryptocnemus chinensis HL Chen, 1995 [ACCEPTED SPECIES 9837:ZWKZ nidx=null]
 + Cryptocnemus chinensis Chen, 1996 [ACCEPTED SPECIES 9839:9G4JF nidx=null]
Cryptonatica wakkanaiensis
 - Cryptonatica wakkanaiensis Habe & Ka. Ito, 1976 [ACCEPTED SPECIES 9837:6BM65 nidx=null]
 + Cryptonatica wakkanaiensis Habe & Ka. Ito, 1984 [ACCEPTED SPECIES 9839:9G4JG nidx=null]
Cryptopodia fornicata
 - Cryptopodia fornicata (Fabricius, 1782) [ACCEPTED SPECIES 9837:ZYYP nidx=null]
 + Cryptopodia fornicata (Fabricius, 1781) [ACCEPTED SPECIES 9839:9G4JH nidx=null]
Ctenopharyngodon idella
 - Ctenopharyngodon idella (Valenciennes, 1844) [ACCEPTED SPECIES 9837:99H8T nidx=null]
 + Ctenopharyngodon idella (Valenciennes, 1844) [ACCEPTED SPECIES 9839:9G4JJ nidx=null]
Ctenopoma multispine
 - Ctenopoma multispine Peters, 1844 [ACCEPTED SPECIES 9837:8YWVT nidx=null]
 + Ctenopoma multispine Peters, 1844 [ACCEPTED SPECIES 9839:9G4JL nidx=null]
Curtitoma conoidea
 - Curtitoma conoidea (Sars G. O., 1878) [ACCEPTED SPECIES 9837:32KW5 nidx=null]
 + Curtitoma conoidea (G. O. Sars, 1878) [ACCEPTED SPECIES 9839:9G4JS nidx=null]
Curtitoma trevellianum
 - Curtitoma trevellianum (Turton W., 1834) [SYNONYM SPECIES 9837:7QWG3 nidx=null parent=32KWT]
 + Curtitoma trevellianum (W. Turton, 1834) [SYNONYM SPECIES 9839:9G4JT nidx=null parent=32KWT]
Curvella brevis
 - Curvella brevis (Quadras & Möllendorff, 1895) [ACCEPTED SPECIES 9837:7QWG7 nidx=null]
 + Curvella brevis (Quadras & Möllendorff, 1896) [ACCEPTED SPECIES 9839:9G8MP nidx=null]
Cuspidaria glacialis
 - Cuspidaria glacialis (Sars G. O., 1878) [ACCEPTED SPECIES 9837:32M9T nidx=null]
 + Cuspidaria glacialis (G. O. Sars, 1878) [ACCEPTED SPECIES 9839:9G4JX nidx=null]
Cuspidaria lamellosa
 - Cuspidaria lamellosa (Sars G. O., 1878) [ACCEPTED SPECIES 9837:6BQWR nidx=null]
 + Cuspidaria lamellosa (G. O. Sars, 1878) [ACCEPTED SPECIES 9839:9G4JY nidx=null]
Cuspidaria pectinata
 - Cuspidaria pectinata (Carpenter, 1865) [SYNONYM SPECIES 9837:32MCR nidx=null parent=R5KH]
 + Cuspidaria pectinata (P. P. Carpenter, 1864) [SYNONYM SPECIES 9839:9G4JZ nidx=null parent=9G4BV]
Cuspidaria subtorta
 - Cuspidaria subtorta (Sars G. O., 1878) [ACCEPTED SPECIES 9837:6C38T nidx=null]
 + Cuspidaria subtorta (G. O. Sars, 1878) [ACCEPTED SPECIES 9839:9G4K2 nidx=null]
Cyanerpes caeruleus longirostris
 - Cyanerpes caeruleus longirostris (Cabanis, 1850) [ACCEPTED SUBSPECIES 9837:5GQVY nidx=null]
 + Cyanerpes caeruleus longirostris (Cabanis, 1851) [ACCEPTED SUBSPECIES 9839:9G7FS nidx=null]
Cyanerpes cyaneus brevipes
 - Cyanerpes cyaneus brevipes (Cabanis, 1850) [ACCEPTED SUBSPECIES 9837:5GQW2 nidx=null]
 + Cyanerpes cyaneus brevipes (Cabanis, 1851) [ACCEPTED SUBSPECIES 9839:9G7FT nidx=null]
Cyanerpes cyaneus eximius
 - Cyanerpes cyaneus eximius (Cabanis, 1850) [ACCEPTED SUBSPECIES 9837:5GQW6 nidx=null]
 + Cyanerpes cyaneus eximius (Cabanis, 1851) [ACCEPTED SUBSPECIES 9839:9G7FV nidx=null]
Cyclax suborbicularis
 - Cyclax suborbicularis (Stimpson, 1860) [ACCEPTED SPECIES 9837:6BSKC nidx=null]
 + Cyclax suborbicularis (Stimpson, 1857) [ACCEPTED SPECIES 9839:9G4K6 nidx=null]
Cyclomaia suborbicularis
 - Cyclomaia suborbicularis (Stimpson, 1860) [SYNONYM SPECIES 9837:6BTQP nidx=null parent=6BSKC]
 + Cyclomaia suborbicularis (Stimpson, 1857) [SYNONYM SPECIES 9839:9G4KB nidx=null parent=9G4K6]
Cyclope pellucida
 - Cyclope pellucida Risso, 1826 [SYNONYM SPECIES 9837:32V92 nidx=null parent=7D6FT]
 + Cyclope pellucida Risso, 1827 [SYNONYM SPECIES 9839:9G4KC nidx=null parent=9G6GX]
Cyclostoma oculuscapri
 - Cyclostoma oculuscapri (W. Wood, 1828) [SYNONYM SPECIES 9837:7QXZ7 nidx=null parent=7QXHK]
 + Cyclostoma oculuscapri Reeve, 1842 [SYNONYM SPECIES 9839:9G8MZ nidx=null parent=7QXHK]
Cylindroiulus punctatus
 - Cylindroiulus punctatus (Leach, 1815) [ACCEPTED SPECIES 9837:333C8 nidx=null]
 + Cylindroiulus punctatus (Leach, 1816) [ACCEPTED SPECIES 9839:9G4KP nidx=null]
Cymatium marerubrum
 - Cymatium marerubrum [SYNONYM SPECIES 9837:7QZ2H nidx=null parent=7T4RY]
 + Cymatium marerubrum Garcia-Talavera, 1985 [SYNONYM SPECIES 9839:9G4KS nidx=null parent=7T4RY]
Cymatium trilineatum
 - Cymatium trilineatum [SYNONYM SPECIES 9837:7QZ3F nidx=null parent=7SZFT]
 + Cymatium trilineatum (Reeve, 1844) [SYNONYM SPECIES 9839:9G4KV nidx=null parent=7SZFT]
Cymonomoides delli
 - Cymonomoides delli (Griffin & Brown, 1975) [SYNONYM SPECIES 9837:6C6X6 nidx=null parent=337V9]
 + Cymonomoides delli (Griffin & Brown, 1976) [SYNONYM SPECIES 9839:9G4KW nidx=null parent=9G4KX]
Cymonomus delli
 - Cymonomus delli Griffin & Brown, 1975 [ACCEPTED SPECIES 9837:337V9 nidx=null]
 + Cymonomus delli Griffin & Brown, 1976 [ACCEPTED SPECIES 9839:9G4KX nidx=null]
Cypraea amethistina
 - Cypraea amethistina Costa O.G., 1830 [SYNONYM SPECIES 9837:33GTR nidx=null parent=6QPPC]
 + Cypraea amethistina O. G. Costa, 1830 [SYNONYM SPECIES 9839:9G4L4 nidx=null parent=6QPPC]
Cypraea lurida var. albida
 - Cypraea lurida var. albida Costa O.G., 1829 [SYNONYM VARIETY 9837:5NFST nidx=null parent=6QPPC]
 + Cypraea lurida var. albida O. G. Costa, 1830 [SYNONYM VARIETY 9839:9G6V5 nidx=null parent=6QPPC]
Cypraea lurida var. monstrosa
 - Cypraea lurida var. monstrosa Gray J.E., 1828 [SYNONYM VARIETY 9837:5NFT9 nidx=null parent=6QPPC]
 + Cypraea lurida var. monstrosa J. E. Gray, 1828 [SYNONYM VARIETY 9839:9G6V6 nidx=null parent=6QPPC]
Cypraea lurida var. rufescens
 - Cypraea lurida var. rufescens Costa O.G., 1829 [SYNONYM VARIETY 9837:5NFTD nidx=null parent=6QPPC]
 + Cypraea lurida var. rufescens O. G. Costa, 1830 [SYNONYM VARIETY 9839:9G6V7 nidx=null parent=6QPPC]
Cypraea lurida var. virescens
 - Cypraea lurida var. virescens Costa O.G., 1829 [SYNONYM VARIETY 9837:5NFTH nidx=null parent=6QPPC]
 + Cypraea lurida var. virescens O. G. Costa, 1830 [SYNONYM VARIETY 9839:9G6V8 nidx=null parent=6QPPC]
Cypraea owenii
 - Cypraea owenii J. E. Gray in G. B. Sowerby I, 1832 [SYNONYM SPECIES 9837:33H4C nidx=null parent=LX3W]
 + Cypraea owenii G. B. Sowerby I, 1832 [SYNONYM SPECIES 9839:9G4L6 nidx=null parent=LX3W]
Cyrena rivalis
 - Cyrena rivalis Philippi, 1850 [SYNONYM SPECIES 9837:7QZ9N nidx=null parent=7QTHT]
 + Cyrena rivalis von dem Busch, 1850 [SYNONYM SPECIES 9839:9G4L7 nidx=null parent=9G4HP]
Cyrtograpsus cirripes
 - Cyrtograpsus cirripes Smith, 1800 [ACCEPTED SPECIES 9837:33MDB nidx=null]
 + Cyrtograpsus cirripes Smith, 1869 [ACCEPTED SPECIES 9839:9G4L9 nidx=null]
Cythara paciniana
 - Cythara paciniana [SYNONYM SPECIES 9837:33QB6 nidx=null parent=72SJX]
 + Cythara paciniana [sic] [SYNONYM SPECIES 9839:9G4LC nidx=null parent=72SJX]
Cytheraea incrassata var. manca
 - Cytheraea incrassata var. manca Braun, 1850 [SYNONYM VARIETY 9837:9946C nidx=null parent=992X6]
 + Cytheraea incrassata var. manca A. Braun, 1851 [SYNONYM VARIETY 9839:9GDCV nidx=null parent=9GDC7]
Cythere costataxi
 - Cythere costataxi ? [SYNONYM SPECIES 9837:9CQM4 nidx=null parent=KDBP]
 + Cythere costataxi ? [SYNONYM SPECIES 9839:9G4LF nidx=null parent=KDBP]
Darioconus textilis
 - Darioconus textilis [SYNONYM SPECIES 9837:3464P nidx=null parent=5ZXTC]
 + Darioconus textilis [sic] [SYNONYM SPECIES 9839:9G4LR nidx=null parent=5ZXTC]
Davusia glabra
 - Davusia glabra (Dana, 1852) [ACCEPTED SPECIES 9837:6CG8N nidx=null]
 + Davusia glabra (Dana, 1851) [ACCEPTED SPECIES 9839:9G4LV nidx=null]
Delphinula buckmani
 - Delphinula buckmani Morris & Lycett, 1850 [SYNONYM SPECIES 9837:34JTZ nidx=null parent=6RYVX]
 + Delphinula buckmani J. Morris & Lycett, 1851 [SYNONYM SPECIES 9839:9G4LY nidx=null parent=9G5KP]
Delphinula granulosa
 - Delphinula granulosa Dunker in F. Krauss, 1848 [AMBIGUOUS_SYNONYM SPECIES 9837:6CJ3N nidx=null parent=VFB2]
 + Delphinula granulosa Krauss, 1848 [SYNONYM SPECIES 9839:9G4LZ nidx=null parent=VFB2]
Deltocephalus elpatjevskii
 - Deltocephalus elpatjevskii Zachvatkin, 1953 [SYNONYM SPECIES 9837:8RJQW nidx=null parent=443M6]
 + Deltocephalus elpatjevskii Zakhvatkin, 1953 [SYNONYM SPECIES 9839:9G8NP nidx=null parent=9G6CW]
Deltocephalus jenjouristi
 - Deltocephalus jenjouristi Zachvatkin, 1933 [SYNONYM SPECIES 9837:8R8X8 nidx=null parent=8RN3S]
 + Deltocephalus jenjouristi Zakhvatkin, 1933 [SYNONYM SPECIES 9839:9G4XS nidx=null parent=9G9FS]
Deltocephalus kiritshenkoi
 - Deltocephalus kiritshenkoi Zachvatkin, 1953 [SYNONYM SPECIES 9837:8RJTV nidx=null parent=4YCH5]
 + Deltocephalus kiritshenkoi Zakhvatkin, 1953 [SYNONYM SPECIES 9839:9G8NR nidx=null parent=4YCH5]
Deltocephalus undatus
 - Deltocephalus undatus (DeGeer, 1773) [SYNONYM SPECIES 9837:8RK4L nidx=null parent=8RMW2]
 + Deltocephalus undatus (De Geer, 1773) [SYNONYM SPECIES 9839:9G8NT nidx=null parent=9G6TN]
Dendroconus quercinus
 - Dendroconus quercinus (Solander in [Lightfoot] , 1786) [SYNONYM SPECIES 9837:7R2BL nidx=null parent=XY5R]
 + Dendroconus quercinus ( [Lightfoot] , 1786) [SYNONYM SPECIES 9839:9G8NV nidx=null parent=XY5R]
Dendropoma squamifera
 - Dendropoma squamifera [sic] [SYNONYM SPECIES 9837:34S3W nidx=null parent=34S3V]
 + Dendropoma squamifera Ponder, 1967 [SYNONYM SPECIES 9839:9G4MJ nidx=null parent=34S3V]
Dendrotrochus conicoides
 - Dendrotrochus conicoides (Metcalfe, 1851) [SYNONYM SPECIES 9837:7R2CG nidx=null parent=3FTBC]
 + Dendrotrochus conicoides (Metcalfe, 1852) [SYNONYM SPECIES 9839:9G8NW nidx=null parent=3FTBC]
Dentalium (Antalis) agile
 - Dentalium (Antalis) agile Sars G. O., 1872 [SYNONYM SPECIES 9837:34TCK nidx=null parent=679L5]
 + Dentalium (Antalis) agile M. Sars, 1872 [SYNONYM SPECIES 9839:9G4MM nidx=null parent=679L5]
Dentalium abyssorum
 - Dentalium abyssorum Sars M., 1859 [SYNONYM SPECIES 9837:34TDT nidx=null parent=5V9MF]
 + Dentalium abyssorum M. Sars, 1859 [SYNONYM SPECIES 9839:9G4MN nidx=null parent=5V9MF]
Dentalium agile
 - Dentalium agile Sars M. in Sars G. O., 1872 [SYNONYM SPECIES 9837:34TDZ nidx=null parent=679L5]
 + Dentalium agile M. Sars, 1872 [SYNONYM SPECIES 9839:9G4ML nidx=null parent=679L5]
Dentalium bifissum
 - Dentalium bifissum Wood S., 1848 [SYNONYM SPECIES 9837:6CKNP nidx=null parent=36SD4]
 + Dentalium bifissum S. V. Wood, 1848 [SYNONYM SPECIES 9839:9G4MP nidx=null parent=36SD4]
Dentalium pseudoentalis
 - Dentalium pseudoentalis Costa O.G., 1851 [SYNONYM SPECIES 9837:6CL2N nidx=null parent=66XMF]
 + Dentalium pseudoentalis O. G. Costa, 1851 [SYNONYM SPECIES 9839:9G4MQ nidx=null parent=66XMF]
Dentalium vitreum
 - Dentalium vitreum Sars M., 1851 [AMBIGUOUS_SYNONYM SPECIES 9837:34TMR nidx=null parent=6Z33D]
 + Dentalium vitreum M. Sars, 1851 [SYNONYM SPECIES 9839:9G4MR nidx=null parent=6Z33D]
Dermomurex cookei
 - Dermomurex cookei MacNeil in Vokes, 1975 [ACCEPTED SPECIES 9837:86CP2 nidx=null]
 + Dermomurex cookei E. H. Vokes, 1975 [ACCEPTED SPECIES 9839:9G8P5 nidx=null]
Diaphora euryomphala
 - Diaphora euryomphala (Möllendorff, 1893) [SYNONYM SPECIES 9837:7R2QW nidx=null parent=7R2PD]
 + Diaphora euryomphala (Möllendorff, 1895) [SYNONYM SPECIES 9839:9G8P7 nidx=null parent=7R2PD]
Diaphora morleti
 - Diaphora morleti (Hidalgo, 1889) [SYNONYM SPECIES 9837:7R2R8 nidx=null parent=7R2PR]
 + Diaphora morleti (Hidalgo, 1890) [SYNONYM SPECIES 9839:9G8P8 nidx=null parent=7R2PR]
Diedrocephala marginata
 - Diedrocephala marginata (Palisot de Beauvois, 1820) [ACCEPTED SPECIES 9837:35ZRB nidx=null]
 + Diedrocephala marginata (Beauvois, 1820) [ACCEPTED SPECIES 9839:9G4ZB nidx=null]
Diglossa sittoides hyperythra
 - Diglossa sittoides hyperythra Cabanis, 1850 [ACCEPTED SUBSPECIES 9837:5GWLM nidx=null]
 + Diglossa sittoides hyperythra Cabanis, 1851 [ACCEPTED SUBSPECIES 9839:9G7G4 nidx=null]
Dinosoma singhi
 - Dinosoma singhi Singh, Mishra & Singh, 1920 [ACCEPTED SPECIES 9837:8486W nidx=null]
 + Dinosoma singhi Singh, Mishra & Singh, 2020 [ACCEPTED SPECIES 9839:9G8PF nidx=null]
Diochini
 - Diochini Coiffait, 1972 [SYNONYM TRIBE 9837:8VR86 nidx=null parent=8VR85]
 + Diochini Coiffait, 1972 [SYNONYM TRIBE 9839:9FZZW nidx=null parent=8VR85]
Diplommatina (Sinica) paxillus lissa
 - Diplommatina (Sinica) paxillus lissa (Gredler, 1884) [SYNONYM SUBSPECIES 9837:7TTFZ nidx=null parent=7TTJP]
 + Diplommatina (Sinica) paxillus lissa (Gredler, 1887) [SYNONYM SUBSPECIES 9839:9G6PT nidx=null parent=9G6PV]
Diplommatina (Sinica) paxillus var. lissa
 - Diplommatina (Sinica) paxillus var. lissa (Gredler, 1884) [SYNONYM VARIETY 9837:7V64C nidx=null parent=7TTJP]
 + Diplommatina (Sinica) paxillus var. lissa (Gredler, 1887) [SYNONYM VARIETY 9839:9G6PW nidx=null parent=9G6PV]
Diplommatina huttoni occidentalis
 - Diplommatina huttoni occidentalis Guppy, 1872 [SYNONYM SUBSPECIES 9837:7TTHW nidx=null parent=8HPPC]
 + Diplommatina huttoni occidentalis Godwin-Austen, 1886 [SYNONYM SUBSPECIES 9839:9G9MC nidx=null parent=8HPPC]
Diplommatina paxillus lissa
 - Diplommatina paxillus lissa (Gredler, 1884) [ACCEPTED SUBSPECIES 9837:7TTJP nidx=null]
 + Diplommatina paxillus lissa (Gredler, 1887) [ACCEPTED SUBSPECIES 9839:9G6PV nidx=null]
Diplopoma (Diplopoma) aguadillense turnerae
 - Diplopoma (Diplopoma) aguadillense turnerae (Clench, 1950) [SYNONYM SUBSPECIES 9837:876Z2 nidx=null parent=878BP]
 + Diplopoma (Diplopoma) aguadillense turnerae (Clench, 1951) [SYNONYM SUBSPECIES 9839:9G9MF nidx=null parent=9G9MD]
Diplopoma aguadillense turnerae
 - Diplopoma aguadillense turnerae (Clench, 1950) [ACCEPTED SUBSPECIES 9837:878BP nidx=null]
 + Diplopoma aguadillense turnerae (Clench, 1951) [ACCEPTED SUBSPECIES 9839:9G9MD nidx=null]
Discodoris pusae
 - Discodoris pusae Marcus Er., 1955 [SYNONYM SPECIES 9837:36TK6 nidx=null parent=3FH45]
 + Discodoris pusae Er. Marcus, 1955 [SYNONYM SPECIES 9839:9G4NV nidx=null parent=3FH45]
Discolopeus
 - Discolopeus [ACCEPTED GENUS 9837:8RGL9 nidx=null]
 + Discolopeus Stiller, 2019 [SYNONYM GENUS 9839:9G7Q4 nidx=null parent=9G7Q5]
 + Discolopeus Stiller, 2019 [ACCEPTED GENUS 9839:9G7Q5 nidx=null]
Distortrix cancellinus
 - Distortrix cancellinus [SYNONYM SPECIES 9837:36YFB nidx=null parent=6DCDN]
 + Distortrix cancellinus [sic] [SYNONYM SPECIES 9839:9G4NY nidx=null parent=6DCDN]
Dolium haemastomum
 - Dolium haemastomum Jay in Philippi, 1845 [SYNONYM SPECIES 9837:6DCW7 nidx=null parent=7CHRX]
 + Dolium haemastomum Jay, 1839 [SYNONYM SPECIES 9839:9G4P2 nidx=null parent=7CHRX]
Donax semistriatus var. rostrata
 - Donax semistriatus var. rostrata Fischer P. in Vassel, 1880 [SYNONYM VARIETY 9837:5NLY9 nidx=null parent=379T6]
 + Donax semistriatus var. rostrata P. Fischer, 1880 [SYNONYM VARIETY 9839:9G6V9 nidx=null parent=379T6]
Dondice galaxiana
 - Dondice galaxiana Millen & Hermosillo, 2012 [SYNONYM SPECIES 9837:8MWFY nidx=null parent=8NDKJ]
 + Dondice galaxiana Millen & Hermosillo, 2012 [ACCEPTED SPECIES 9839:379W2 nidx=null]
Dondice occidentalis
 - Dondice occidentalis (Engel, 1925) [SYNONYM SPECIES 9837:8MWFZ nidx=null parent=8NCSJ]
 + Dondice occidentalis (Engel, 1925) [ACCEPTED SPECIES 9839:379W4 nidx=null]
Dondice parguerensis
 - Dondice parguerensis Brandon & Cutress, 1985 [SYNONYM SPECIES 9837:8MWG2 nidx=null parent=8NFDH]
 + Dondice parguerensis Brandon & Cutress, 1985 [ACCEPTED SPECIES 9839:379W5 nidx=null]
Dondice trainitoi
 - Dondice trainitoi Furfaro & Mariottini, 2020 [SYNONYM SPECIES 9837:8MWG3 nidx=null parent=8NCXZ]
 + Dondice trainitoi Furfaro & Mariottini, 2020 [ACCEPTED SPECIES 9839:7R4P3 nidx=null]
Doratura (Doratura) gravis
 - Doratura (Doratura) gravis Emeljanov, 1966 [ACCEPTED SPECIES 9837:8JRWP nidx=null]
 + Doratura (Doratura) gravis Emeljanov, 1966 [SYNONYM SPECIES 9839:8JRWN nidx=null parent=6DFLW]
Doratura (Doratura) stylata
 - Doratura (Doratura) stylata (Boheman, 1847) [ACCEPTED SPECIES 9837:6DFMD nidx=null]
 + Doratura (Doratura) stylata (Boheman, 1847) [SYNONYM SPECIES 9839:8J34F nidx=null parent=8JRWY]
Doratura concors
 - Doratura concors Horváth, 1903 [SYNONYM SPECIES 9837:8J34H nidx=null parent=8JRWR]
 + Doratura concors Horváth, 1903 [ACCEPTED SPECIES 9839:6DFM7 nidx=null]
Doratura gravis
 - Doratura gravis Emeljanov, 1966 [SYNONYM SPECIES 9837:8J34J nidx=null parent=8JRWP]
 + Doratura gravis Emeljanov, 1966 [ACCEPTED SPECIES 9839:6DFLW nidx=null]
Doridium capense
 - Doridium capense Bergh, 1908 [SYNONYM SPECIES 9837:37D6Q nidx=null parent=4G6FR]
 + Doridium capense Bergh, 1907 [SYNONYM SPECIES 9839:9G4P4 nidx=null parent=4G6FR]
Doridunculus echinulatus
 - Doridunculus echinulatus Sars G. O., 1878 [ACCEPTED SPECIES 9837:37D85 nidx=null]
 + Doridunculus echinulatus G. O. Sars, 1878 [ACCEPTED SPECIES 9839:9G4P5 nidx=null]
Doris amabilis
 - Doris amabilis Kelaart, 1859 [SYNONYM SPECIES 9837:37DCP nidx=null parent=5YHKC]
 + Doris amabilis Kelaart, 1858 [SYNONYM SPECIES 9839:9G4P6 nidx=null parent=5YHKC]
Doris eubalia
 - Doris eubalia Fischer P., 1872 [SYNONYM SPECIES 9837:6DGMY nidx=null parent=6DGQ5]
 + Doris eubalia P. Fischer, 1872 [SYNONYM SPECIES 9839:9G4P7 nidx=null parent=6DGQ5]
Doris funebris
 - Doris funebris Kelaart, 1859 [SYNONYM SPECIES 9837:37DFD nidx=null parent=3QQYC]
 + Doris funebris Kelaart, 1858 [SYNONYM SPECIES 9839:9G4P8 nidx=null parent=9G558]
Doris intecta
 - Doris intecta Kelaart, 1859 [SYNONYM SPECIES 9837:37DG4 nidx=null parent=J7VY]
 + Doris intecta Kelaart, 1858 [SYNONYM SPECIES 9839:9G4P9 nidx=null parent=9G475]
Doris lutescens
 - Doris lutescens Delle Chiaje in Verany, 1846 [SYNONYM SPECIES 9837:37DH2 nidx=null parent=3DXR9]
 + Doris lutescens Delle Chiaje, 1841 [SYNONYM SPECIES 9839:9G4PB nidx=null parent=3DXR9]
Doris maccarthyi
 - Doris maccarthyi Kelaart, 1859 [SYNONYM SPECIES 9837:37DH4 nidx=null parent=37DBX]
 + Doris maccarthyi Kelaart, 1858 [SYNONYM SPECIES 9839:9G4PC nidx=null parent=37DBX]
Doris osseosa
 - Doris osseosa Kelaart, 1859 [SYNONYM SPECIES 9837:37DJH nidx=null parent=J7W4]
 + Doris osseosa Kelaart, 1858 [SYNONYM SPECIES 9839:9G4PD nidx=null parent=9G476]
Dorisiana crassa
 - Dorisiana crassa Boulard, 1998 [ACCEPTED SPECIES 9837:37DP2 nidx=null]
 + Dorisiana crassa Boulard, 2001 [ACCEPTED SPECIES 9839:9G8BS nidx=null]
Dosinia (Austrodosinia) anus
 - Dosinia (Austrodosinia) anus (Philippi, 1848) [SYNONYM SPECIES 9837:37G7D nidx=null parent=37G8Q]
 + Dosinia (Austrodosinia) anus (Philippi, 1847) [SYNONYM SPECIES 9839:9G4PH nidx=null parent=37G8Q]
Doto crassicornis
 - Doto crassicornis Sars M., 1870 [ACCEPTED SPECIES 9837:37HF4 nidx=null]
 + Doto crassicornis M. Sars, 1870 [ACCEPTED SPECIES 9839:9G4PJ nidx=null]
Doto nigra
 - Doto nigra [SYNONYM SPECIES 9837:37HG9 nidx=null parent=37HGJ]
 + Doto nigra Eliot, 1910 [SYNONYM SPECIES 9839:9G4PK nidx=null parent=37HGJ]
Dreissenoidea
 - Dreissenoidea Gray, 1840 [ACCEPTED SUPERFAMILY 9837:7NFND nidx=null]
 + Dreissenoidea J. E. Gray, 1840 [ACCEPTED SUPERFAMILY 9839:53K nidx=null]
Drepanicerus
 - Drepanicerus [ACCEPTED GENUS 9837:8RVHN nidx=null]
 + Drepanicerus Freytag, 2017 [ACCEPTED GENUS 9839:9G7Q8 nidx=null]
Drillia confusa
 - Drillia confusa Seguenza G., 1880 [SYNONYM SPECIES 9837:37NNW nidx=null parent=4Z936]
 + Drillia confusa G. Seguenza, 1880 [SYNONYM SPECIES 9839:9G4PM nidx=null parent=4Z936]
Driodurgades
 - Driodurgades Zachvatkin, 1946 [SYNONYM GENUS 9837:8JL3D nidx=null parent=8HHSJ]
 + Driodurgades Zakhvatkin, 1946 [SYNONYM GENUS 9839:9G7Q9 nidx=null parent=9G35Q]
Dromia verrucosipes
 - Dromia verrucosipes Adams in Belcher, 1848 [SYNONYM SPECIES 9837:92YB5 nidx=null parent=52QM3]
 + Dromia verrucosipes Adams, 1847 [SYNONYM SPECIES 9839:9G4PN nidx=null parent=52QLX]
Dromilites
 - Dromilites H. Milne Edwards, 1837 [ACCEPTED GENUS 9837:9F4HS nidx=null]
 + Dromilites Bell, 1858 [ACCEPTED GENUS 9839:9G987 nidx=null]
Druodurgades
 - Druodurgades Zachvatkin, 1946 [SYNONYM GENUS 9837:8JL3G nidx=null parent=8HHSJ]
 + Druodurgades Zakhvatkin, 1946 [SYNONYM GENUS 9839:9G7QB nidx=null parent=9G35Q]
Drymaeus (Drymaeus) castaneostrigatus
 - Drymaeus (Drymaeus) castaneostrigatus DaCosta, 1906 [SYNONYM SPECIES 9837:7R539 nidx=null parent=7R5FY]
 + Drymaeus (Drymaeus) castaneostrigatus Da Costa, 1906 [SYNONYM SPECIES 9839:9G4PQ nidx=null parent=9G4PP]
Drymaeus (Drymaeus) rosenbergi
 - Drymaeus (Drymaeus) rosenbergi DaCosta, 1906 [SYNONYM SPECIES 9837:7R56Z nidx=null parent=7R5NJ]
 + Drymaeus (Drymaeus) rosenbergi Da Costa, 1906 [SYNONYM SPECIES 9839:9G4PS nidx=null parent=9G4PR]
Drymaeus castaneostrigatus
 - Drymaeus castaneostrigatus DaCosta, 1906 [ACCEPTED SPECIES 9837:7R5FY nidx=null]
 + Drymaeus castaneostrigatus Da Costa, 1906 [ACCEPTED SPECIES 9839:9G4PP nidx=null]
Drymaeus rosenbergi
 - Drymaeus rosenbergi DaCosta, 1906 [ACCEPTED SPECIES 9837:7R5NJ nidx=null]
 + Drymaeus rosenbergi Da Costa, 1906 [ACCEPTED SPECIES 9839:9G4PR nidx=null]
Dryodurgades
 - Dryodurgades Zachvatkin, 1946 [ACCEPTED GENUS 9837:8HHSJ nidx=null]
 + Dryodurgades Zakhvatkin, 1946 [ACCEPTED GENUS 9839:9G35Q nidx=null]
Durgades (Dryodurgades)
 - Durgades (Dryodurgades) Zachvatkin, 1946 [SYNONYM SUBGENUS 9837:8KJBR nidx=null parent=8HHSJ]
 + Durgades (Dryodurgades) Zakhvatkin, 1946 [SYNONYM SUBGENUS 9839:9G35R nidx=null parent=9G35Q]
Duvaucelia (Tritonidoxa) capensis
 - Duvaucelia (Tritonidoxa) capensis (Bergh, 1907) [SYNONYM SPECIES 9837:6DPVR nidx=null parent=5956H]
 + Duvaucelia (Tritonidoxa) capensis (Bergh, 1908) [SYNONYM SPECIES 9839:9G4PW nidx=null parent=9G6H4]
Dyocerasoma lignivorum
 - Dyocerasoma lignivorum (Verhoeff, 1899) [SYNONYM SPECIES 9837:88NR9 nidx=null parent=7GQK9]
 + Dyocerasoma lignivorum (Verhoeff, 1899) [ACCEPTED SPECIES 9839:386F7 nidx=null]
Ebalia barnardi
 - Ebalia barnardi Stebbing, 1914 [SYNONYM SPECIES 9837:7VTWQ nidx=null parent=38C7G]
 + Ebalia barnardi (Stebbing, 1920) [SYNONYM SPECIES 9839:9G4PZ nidx=null parent=38C7G]
Ebalia postulans
 - Ebalia postulans Stebbing, 1910 [SYNONYM SPECIES 9837:7VTWR nidx=null parent=38C7J]
 + Ebalia postulans (Stebbing, 1921) [SYNONYM SPECIES 9839:9G4Q2 nidx=null parent=38C7J]
Ebalia scandens
 - Ebalia scandens Stebbing, 1910 [SYNONYM SPECIES 9837:7VTWT nidx=null parent=38C7J]
 + Ebalia scandens (Stebbing, 1920) [SYNONYM SPECIES 9839:9G4Q3 nidx=null parent=38C7J]
Ebaliopsis erosa
 - Ebaliopsis erosa (A. Milne-Edwards, 1874) [ACCEPTED SPECIES 9837:38C85 nidx=null]
 + Ebaliopsis erosa (A. Milne-Edwards, 1873) [ACCEPTED SPECIES 9839:9G4Q4 nidx=null]
Echinocamptus pilosus
 - Echinocamptus pilosus (Douwe, 1910) [SYNONYM SPECIES 9837:7TDRH nidx=null parent=4HTW6]
 + Echinocamptus pilosus (Douwe, 1911) [SYNONYM SPECIES 9839:9G4Q5 nidx=null parent=4HTW6]
Echinolatus bullatus
 - Echinolatus bullatus (Balss, 1924) [ACCEPTED SPECIES 9837:38JBN nidx=null]
 + Echinolatus bullatus (Balss, 1923) [ACCEPTED SPECIES 9839:9G4Q6 nidx=null]
Edouardia caffra
 - Edouardia caffra (F. Krauss in L. Pfeiffer, 1846) [SYNONYM SPECIES 9837:38T77 nidx=null parent=3G43B]
 + Edouardia caffra (L. Pfeiffer, 1848) [SYNONYM SPECIES 9839:9G4Q9 nidx=null parent=9G4VS]
Edouardia natalensis
 - Edouardia natalensis (F. Krauss in L. Pfeiffer, 1846) [SYNONYM SPECIES 9837:38T7K nidx=null parent=3G43R]
 + Edouardia natalensis (L. Pfeiffer, 1846) [SYNONYM SPECIES 9839:9G4QB nidx=null parent=9G4VT]
Edwardsiana
 - Edwardsiana Zachvatkin, 1929 [ACCEPTED GENUS 9837:8HHX6 nidx=null]
 + Edwardsiana Zakhvatkin, 1929 [ACCEPTED GENUS 9839:9G364 nidx=null]
Edwardsiana divergens orientalis
 - Edwardsiana divergens orientalis Zachvatkin, 1949 [SYNONYM SUBSPECIES 9837:5H2VV nidx=null parent=38TJQ]
 + Edwardsiana divergens orientalis Zakhvatkin, 1949 [SYNONYM SUBSPECIES 9839:9G7GF nidx=null parent=38TJQ]
Edwardsiana iranicola
 - Edwardsiana iranicola Zachvatkin, 1947 [ACCEPTED SPECIES 9837:6DXNN nidx=null]
 + Edwardsiana iranicola Zakhvatkin, 1947 [ACCEPTED SPECIES 9839:9G54G nidx=null]
Edwardsiana ishidai
 - Edwardsiana ishidai (Ishihara, 1953) [SYNONYM SPECIES 9837:8R9B4 nidx=null parent=38THV]
 + Edwardsiana ishidai (Matsumura, 1932) [ACCEPTED SPECIES 9839:8J3BN nidx=null]
Edwardsiana menzbieri
 - Edwardsiana menzbieri Zachvatkin, 1948 [ACCEPTED SPECIES 9837:38TJD nidx=null]
 + Edwardsiana menzbieri Zakhvatkin, 1948 [ACCEPTED SPECIES 9839:9G54H nidx=null]
Edwardsiana plebeja orientalis
 - Edwardsiana plebeja orientalis Zachvatkin, 1949 [SYNONYM INFRASPECIFIC_NAME 9837:8RV4L nidx=null parent=38TJQ]
 + Edwardsiana plebeja orientalis Zakhvatkin, 1949 [SYNONYM INFRASPECIFIC_NAME 9839:9G9LD nidx=null parent=38TJQ]
Edwardsiana ruthenica
 - Edwardsiana ruthenica Zachvatkin, 1929 [ACCEPTED SPECIES 9837:38TKC nidx=null]
 + Edwardsiana ruthenica Zakhvatkin, 1929 [ACCEPTED SPECIES 9839:9G54J nidx=null]
Edwardsiana severtsovi
 - Edwardsiana severtsovi Zachvatkin, 1948 [ACCEPTED SPECIES 9837:38TKJ nidx=null]
 + Edwardsiana severtsovi Zakhvatkin, 1948 [ACCEPTED SPECIES 9839:9G54K nidx=null]
Edwardsiana solearis rossica
 - Edwardsiana solearis rossica Zachvatkin, 1948 [SYNONYM SUBSPECIES 9837:5H2VX nidx=null parent=38TG9]
 + Edwardsiana solearis rossica Zakhvatkin, 1948 [SYNONYM SUBSPECIES 9839:9G7GG nidx=null parent=38TG9]
Edwardsiana tshinari
 - Edwardsiana tshinari Zachvatkin, 1947 [ACCEPTED SPECIES 9837:38TKZ nidx=null]
 + Edwardsiana tshinari Zakhvatkin, 1947 [ACCEPTED SPECIES 9839:9G54L nidx=null]
Edwardsina
 - Edwardsina Zachvatkin, 1929 [SYNONYM GENUS 9837:8HHX7 nidx=null parent=8HHX6]
 + Edwardsina Zakhvatkin, 1929 [SYNONYM GENUS 9839:9G2HM nidx=null parent=9G364]
Edwarsiana
 - Edwarsiana Zachvatkin, 1929 [SYNONYM GENUS 9837:8JL42 nidx=null parent=8HHX6]
 + Edwarsiana Zakhvatkin, 1929 [SYNONYM GENUS 9839:9G7QF nidx=null parent=9G364]
Egerna
 - Egerna Zachvatkin, 1949 [SYNONYM GENUS 9837:8JL44 nidx=null parent=8HDJ3]
 + Egerna Zakhvatkin, 1949 [SYNONYM GENUS 9839:9G7QG nidx=null parent=8HDJ3]
Egerna sinuata noxia
 - Egerna sinuata noxia Zachvatkin, 1949 [SYNONYM SUBSPECIES 9837:8JNCZ nidx=null parent=8JQ4G]
 + Egerna sinuata noxia Zakhvatkin, 1949 [SYNONYM SUBSPECIES 9839:9G9MG nidx=null parent=8JQ4G]
Eleutherodactylus johnstonei
 - Eleutherodactylus johnstonei Barbour, 1914 [ACCEPTED SPECIES 9837:399D5 nidx=null]
 + Eleutherodactylus johnstonei Barbour, 1914 [ACCEPTED SPECIES 9839:9G54X nidx=null]
Elymana kozhevnikovi
 - Elymana kozhevnikovi (Zachvatkin, 1938) [ACCEPTED SPECIES 9837:8RKC5 nidx=null]
 + Elymana kozhevnikovi (Zakhvatkin, 1938) [ACCEPTED SPECIES 9839:9G7QJ nidx=null]
Elysia minuta
 - Elysia minuta Sars M., 1835 [SYNONYM SPECIES 9837:6F5YT nidx=null parent=6F624]
 + Elysia minuta M. Sars, 1835 [SYNONYM SPECIES 9839:9G4QN nidx=null parent=6F624]
Elysia pagenstecheri
 - Elysia pagenstecheri Marcus Ev., 1982 [SYNONYM SPECIES 9837:6F5ZW nidx=null parent=6F624]
 + Elysia pagenstecheri Ev. Marcus, 1982 [SYNONYM SPECIES 9839:9G4QP nidx=null parent=6F624]
Emarginula confusa
 - Emarginula confusa Seguenza G., 1866 [SYNONYM SPECIES 9837:39F8P nidx=null parent=39F7L]
 + Emarginula confusa G. Seguenza, 1866 [SYNONYM SPECIES 9839:9G4QQ nidx=null parent=39F7L]
Emarginula foveolata
 - Emarginula foveolata Gerasimov, 1955 [PROVISIONALLY_ACCEPTED SPECIES 9837:7R6JW nidx=null]
 + Emarginula foveolata Nomura & Hatai, 1940 [SYNONYM SPECIES 9839:9G4QR nidx=null parent=6F7CL]
Emberiza capensis
 - Emberiza capensis Linnaeus, 1766 [ACCEPTED SPECIES 9837:39FSS nidx=null]
 + Emberiza capensis Linnaeus, 1767 [ACCEPTED SPECIES 9839:9G559 nidx=null]
Emberiza capensis capensis
 - Emberiza capensis capensis Linnaeus, 1766 [ACCEPTED SUBSPECIES 9837:7K2JJ nidx=null]
 + Emberiza capensis capensis Linnaeus, 1767 [ACCEPTED SUBSPECIES 9839:9G7GJ nidx=null]
Emberiza cia
 - Emberiza cia Linnaeus, 1766 [ACCEPTED SPECIES 9837:6F7GL nidx=null]
 + Emberiza cia Linnaeus, 1767 [ACCEPTED SPECIES 9839:9G55B nidx=null]
Emberiza cia cia
 - Emberiza cia cia Linnaeus, 1766 [ACCEPTED SUBSPECIES 9837:5H435 nidx=null]
 + Emberiza cia cia Linnaeus, 1767 [ACCEPTED SUBSPECIES 9839:9G7GK nidx=null]
Emberiza cirlus
 - Emberiza cirlus Linnaeus, 1766 [ACCEPTED SPECIES 9837:39FSY nidx=null]
 + Emberiza cirlus Linnaeus, 1767 [ACCEPTED SPECIES 9839:9G55C nidx=null]
Empoasca (Chlorita) minor
 - Empoasca (Chlorita) minor Zachvatkin, 1935 [SYNONYM SPECIES 9837:8J3FM nidx=null parent=8KJQ6]
 + Empoasca (Chlorita) minor Zakhvatkin, 1935 [SYNONYM SPECIES 9839:39L9Y nidx=null parent=9G96Q]
Empoasca (Empoasca) decipiens meridiana
 - Empoasca (Empoasca) decipiens meridiana Zachvatkin, 1947 [SYNONYM SUBSPECIES 9837:8JJFC nidx=null parent=8KJH4]
 + Empoasca (Empoasca) decipiens meridiana Zakhvatkin, 1947 [SYNONYM SUBSPECIES 9839:9G7GL nidx=null parent=8KJH4]
Empoasca (Eremochlorita)
 - Empoasca (Eremochlorita) Zachvatkin, 1946 [SYNONYM INFRAGENERIC_NAME 9837:8RH79 nidx=null parent=8JMHK]
 + Empoasca (Eremochlorita) Zakhvatkin, 1946 [SYNONYM INFRAGENERIC_NAME 9839:9G7Z8 nidx=null parent=9G7Z7]
Empoasca (Kybos) abstrusa
 - Empoasca (Kybos) abstrusa Linnavuori, 1949 [SYNONYM SPECIES 9837:8J3PL nidx=null parent=3RGSH]
 + Empoasca (Kybos) abstrusa Linnavuori, 1950 [SYNONYM SPECIES 9839:9G55G nidx=null parent=9G62Z]
Empoasca (Kybos) kiritshenkoi
 - Empoasca (Kybos) kiritshenkoi Zachvatkin, 1947 [SYNONYM SPECIES 9837:39KZ6 nidx=null parent=3RGRW]
 + Empoasca (Kybos) kiritshenkoi Zakhvatkin, 1947 [SYNONYM SPECIES 9839:9G55M nidx=null parent=9G62V]
Empoasca (Kybos) mesasiatica
 - Empoasca (Kybos) mesasiatica (Zachvatkin, 1953) [SYNONYM SPECIES 9837:8J3R6 nidx=null parent=3RGV3]
 + Empoasca (Kybos) mesasiatica (Zakhvatkin, 1953) [SYNONYM SPECIES 9839:9G55N nidx=null parent=9G634]
Empoasca (Kybos) niveicolor niveicolor
 - Empoasca (Kybos) niveicolor niveicolor (Zachvatkin, 1953) [SYNONYM INFRASPECIFIC_NAME 9837:8JJFR nidx=null parent=8K2SG]
 + Empoasca (Kybos) niveicolor niveicolor (Zakhvatkin, 1953) [SYNONYM INFRASPECIFIC_NAME 9839:9G7GN nidx=null parent=9G9N2]
Empoasca (Kybos) oshanini
 - Empoasca (Kybos) oshanini (Zachvatkin, 1953) [SYNONYM SPECIES 9837:8J3RH nidx=null parent=3RGVG]
 + Empoasca (Kybos) oshanini (Zakhvatkin, 1953) [SYNONYM SPECIES 9839:9G55P nidx=null parent=9G637]
Empoasca (Kybos) verbae
 - Empoasca (Kybos) verbae (Zachvatkin, 1953) [SYNONYM SPECIES 9837:8JS46 nidx=null parent=3RGV7]
 + Empoasca (Kybos) verbae (Zakhvatkin, 1953) [SYNONYM SPECIES 9839:9G8BV nidx=null parent=3RGV7]
Empoasca abstrusa
 - Empoasca abstrusa Linnavuori, 1949 [SYNONYM SPECIES 9837:39L49 nidx=null parent=3RGSH]
 + Empoasca abstrusa Linnavuori, 1950 [SYNONYM SPECIES 9839:9G55F nidx=null parent=9G62Z]
Empoasca decipiens meridiana
 - Empoasca decipiens meridiana Zachvatkin, 1946 [SYNONYM SUBSPECIES 9837:8JJFX nidx=null parent=8KJH4]
 + Empoasca decipiens meridiana Zakhvatkin, 1946 [SYNONYM SUBSPECIES 9839:9G7GM nidx=null parent=8KJH4]
Empoasca decipiens var. turanica
 - Empoasca decipiens var. turanica Zachvatkin, 1947 [SYNONYM VARIETY 9837:8JJYD nidx=null parent=8KL6H]
 + Empoasca decipiens var. turanica Zakhvatkin, 1947 [SYNONYM VARIETY 9839:9G9N6 nidx=null parent=9G9MQ]
Empoasca meridiana
 - Empoasca meridiana Zachvatkin, 1947 [SYNONYM SPECIES 9837:8RQJY nidx=null parent=8KJH4]
 + Empoasca meridiana Zakhvatkin, 1947 [SYNONYM SPECIES 9839:9G8BT nidx=null parent=8KJH4]
Empoasca minor
 - Empoasca minor Zachvatkin, 1935 [AMBIGUOUS_SYNONYM SPECIES 9837:8J3YK nidx=null parent=8KJQ6]
 + Empoasca minor Zakhvatkin, 1935 [AMBIGUOUS_SYNONYM SPECIES 9839:39KKM nidx=null parent=9G96Q]
Empoasca turanica
 - Empoasca turanica Zachvatkin, 1947 [SYNONYM SPECIES 9837:8J438 nidx=null parent=8KL6H]
 + Empoasca turanica Zakhvatkin, 1947 [SYNONYM SPECIES 9839:9G8PP nidx=null parent=9G9MQ]
Ennea (Diaphora) morleti
 - Ennea (Diaphora) morleti Hidalgo, 1889 [SYNONYM SPECIES 9837:7R749 nidx=null parent=7R2PR]
 + Ennea (Diaphora) morleti Hidalgo, 1890 [SYNONYM SPECIES 9839:9G4QZ nidx=null parent=7R2PR]
Ennea obesa
 - Ennea obesa (Taylor, 1877) [SYNONYM SPECIES 9837:39VST nidx=null parent=6DXZ8]
 + Ennea obesa (J. S. Gibbons, 1877) [SYNONYM SPECIES 9839:9G4R5 nidx=null parent=6DXZ8]
Eocantharus latus
 - Eocantharus latus (Sowerby J., 1813) [ACCEPTED SPECIES 9837:8YM9G nidx=null]
 + Eocantharus latus (J. Sowerby, 1813) [ACCEPTED SPECIES 9839:9GBXV nidx=null]
Eohardya
 - Eohardya Zachvatkin, 1946 [SYNONYM UNRANKED 9837:8RQ33 nidx=null parent=8RGZW]
 + Eohardya Zakhvatkin, 1946 [ACCEPTED GENUS 9839:9G7ZP nidx=null]
Eolis conspersa
 - Eolis conspersa Fischer P., 1869 [SYNONYM SPECIES 9837:6FJBF nidx=null parent=4ZDWB]
 + Eolis conspersa P. Fischer, 1869 [SYNONYM SPECIES 9839:9G4RD nidx=null parent=4ZDWB]
Eotympanotonus funatus
 - Eotympanotonus funatus (Sowerby J., 1814) [ACCEPTED SPECIES 9837:8YMC4 nidx=null]
 + Eotympanotonus funatus (J. Sowerby, 1814) [ACCEPTED SPECIES 9839:9GBXW nidx=null]
Epalzeorhynchos kalopterus
 - Epalzeorhynchos kalopterus (Bleeker, 1850) [ACCEPTED SPECIES 9837:99HSZ nidx=null]
 + Epalzeorhynchos kalopterus (Bleeker, 1850) [ACCEPTED SPECIES 9839:9G4RG nidx=null]
Eremochlorita ak-dzhusani
 - Eremochlorita ak-dzhusani Zachvatkin, 1953 [SYNONYM SPECIES 9837:6GF3K nidx=null parent=5XWFP]
 + Eremochlorita ak-dzhusani Zakhvatkin, 1953 [SYNONYM SPECIES 9839:9G57T nidx=null parent=9G4M2]
Eremophlepsius
 - Eremophlepsius Zachvatkin, 1924 [ACCEPTED GENUS 9837:8R526 nidx=null]
 + Eremophlepsius Zakhvatkin, 1924 [ACCEPTED GENUS 9839:9G379 nidx=null]
Eremophlepsius rohdendorfi
 - Eremophlepsius rohdendorfi Zachvatkin, 1924 [ACCEPTED SPECIES 9837:6GG4V nidx=null]
 + Eremophlepsius rohdendorfi Zakhvatkin, 1924 [ACCEPTED SPECIES 9839:9G57V nidx=null]
Eremophlepsius rohdendorfi var. marmoratus
 - Eremophlepsius rohdendorfi var. marmoratus Zachvatkin, 1924 [SYNONYM VARIETY 9837:8RSV6 nidx=null parent=6GG4V]
 + Eremophlepsius rohdendorfi var. marmoratus Zakhvatkin, 1924 [SYNONYM VARIETY 9839:9G9PX nidx=null parent=9G57V]
Ergyne cornucervis
 - Ergyne cornucervis Risso, 1826 [SYNONYM SPECIES 9837:848P3 nidx=null parent=6GK6P]
 + Ergyne cornucervis Risso, 1827 [SYNONYM SPECIES 9839:9G8PZ nidx=null parent=6GK6P]
Errhomus obesa
 - Errhomus obesa Baker, 1898 [SYNONYM SPECIES 9837:8KP5G nidx=null parent=3B9QX]
 + Errhomus obesa Oman, 1952 [SYNONYM SPECIES 9839:9G8QC nidx=null parent=3B9QX]
Erythroneura (Helionidia) himyarita
 - Erythroneura (Helionidia) himyarita (Zachvatkin, 1946) [SYNONYM SPECIES 9837:8J4N6 nidx=null parent=3KBFM]
 + Erythroneura (Helionidia) himyarita (Zakhvatkin, 1946) [SYNONYM SPECIES 9839:9G8QD nidx=null parent=9G5PG]
Euceratosoma helveticum
 - Euceratosoma helveticum [ACCEPTED SPECIES 9837:3BRS8 nidx=null]
 + Euceratosoma helveticum (Verhoeff, 1894) [SYNONYM SPECIES 9839:9G4RR nidx=null parent=MGR8]
Euceratosoma pusillum
 - Euceratosoma pusillum [ACCEPTED SPECIES 9837:3BRSF nidx=null]
 + Euceratosoma pusillum (Verhoeff, 1893) [SYNONYM SPECIES 9839:9G4RS nidx=null parent=48DFG]
Euchaeta indica
 - Euchaeta indica Wolfenden, 1905 [ACCEPTED SPECIES 9837:3BS7P nidx=null]
 + Euchaeta indica Wolfenden, 1906 [ACCEPTED SPECIES 9839:9G4RT nidx=null]
Euconnus (Euconnus) rufescens
 - Euconnus (Euconnus) rufescens Ganglbauer, 1899 [SYNONYM SPECIES 9837:6GVGZ nidx=null parent=6GTPL]
 + Euconnus (Euconnus) rufescens (Motschulsky, 1851) [ACCEPTED SPECIES 9839:9G8CJ nidx=null]
Euconnus (Euconnus) simillimus
 - Euconnus (Euconnus) simillimus Franz, 1992 [SYNONYM SPECIES 9837:6H7H3 nidx=null parent=6H7GR]
 + Euconnus (Euconnus) simillimus Franz, 1986 [ACCEPTED SPECIES 9839:9G8QK nidx=null]
Eucycliophora
 - Eucycliophora Funch & Kristensen, 1995 [SYNONYM CLASS 9837:B9 nidx=null parent=3T]
 + Eucycliophora Funch & Kristensen, 1995 [SYNONYM CLASS 9839:9G25D nidx=null parent=3T]
Eulima altavillensis
 - Eulima altavillensis Seguenza G., 1876 [SYNONYM SPECIES 9837:6GXF2 nidx=null parent=6QXCJ]
 + Eulima altavillensis G. Seguenza, 1876 [SYNONYM SPECIES 9839:9G4RY nidx=null parent=6QXCJ]
Eulithidium umbilicatum
 - Eulithidium umbilicatum (d'Orbigny, 1840) [ACCEPTED SPECIES 9837:3CBPL nidx=null]
 + Eulithidium umbilicatum (d'Orbigny, 1842) [ACCEPTED SPECIES 9839:9G4RZ nidx=null]
Euphyodesmus vector
 - Euphyodesmus vector Chamberlin, 1941 [SYNONYM SPECIES 9837:9CQVT nidx=null parent=354BV]
 + Euphyodesmus vector Chamberlin, 1941 [SYNONYM SPECIES 9839:9G4S2 nidx=null parent=354BV]
Eupolia brocki
 - Eupolia brocki ? [SYNONYM SPECIES 9837:9CQVW nidx=null parent=68D67]
 + Eupolia brocki ? [SYNONYM SPECIES 9839:9G4S3 nidx=null parent=68D67]
Eupolia hemprichi
 - Eupolia hemprichi ? [SYNONYM SPECIES 9837:9CQVX nidx=null parent=68D67]
 + Eupolia hemprichi ? [SYNONYM SPECIES 9839:9G4S4 nidx=null parent=68D67]
Eupolia quinquelineata
 - Eupolia quinquelineata ? [SYNONYM SPECIES 9837:9CQVY nidx=null parent=68D5Y]
 + Eupolia quinquelineata ? [SYNONYM SPECIES 9839:9G4S5 nidx=null parent=68D5Y]
Eupteryx (Eupteryx) origani
 - Eupteryx (Eupteryx) origani Zachvatkin, 1948 [ACCEPTED SPECIES 9837:6HDGH nidx=null]
 + Eupteryx (Eupteryx) origani Zakhvatkin, 1948 [ACCEPTED SPECIES 9839:9G5DN nidx=null]
Eupteryx (Eupteryx) pavlovskii
 - Eupteryx (Eupteryx) pavlovskii Zachvatkin, 1947 [ACCEPTED SPECIES 9837:3CYPX nidx=null]
 + Eupteryx (Eupteryx) pavlovskii Zakhvatkin, 1947 [ACCEPTED SPECIES 9839:9G5DP nidx=null]
Eupteryx origani
 - Eupteryx origani Zachvatkin, 1948 [SYNONYM SPECIES 9837:8JWFV nidx=null parent=6HDGH]
 + Eupteryx origani Zakhvatkin, 1948 [SYNONYM SPECIES 9839:9G5DM nidx=null parent=9G5DN]
Eupteryx pavlovskii
 - Eupteryx pavlovskii Zachvatkin, 1947 [AMBIGUOUS_SYNONYM SPECIES 9837:8J53S nidx=null parent=3CYPX]
 + Eupteryx pavlovskii Zakhvatkin, 1947 [AMBIGUOUS_SYNONYM SPECIES 9839:9G5DQ nidx=null parent=9G5DP]
Eurhadina oshanini
 - Eurhadina oshanini Zachvatkin, 1948 [SYNONYM SPECIES 9837:3CZGD nidx=null parent=3CZDR]
 + Eurhadina oshanini Zakhvatkin, 1948 [SYNONYM SPECIES 9839:9G5DR nidx=null parent=3CZDR]
Euryphara contentei
 - Euryphara contentei Boulard, 1982 [SYNONYM SPECIES 9837:8J56N nidx=null parent=8JZZB]
 + Euryphara contentei Boulard, 1982 [ACCEPTED SPECIES 9839:3D5VY nidx=null]
Eurytoma terebinthi
 - Eurytoma terebinthi Rondani, 1877 [ACCEPTED SPECIES 9837:3D85N nidx=null]
 + Eurytoma terebinthi Rondani, 1877 [ACCEPTED SPECIES 9839:9G5DY nidx=null]
Euscelis (Hemiphanes) heptneri
 - Euscelis (Hemiphanes) heptneri Zachvatkin, 1945 [SYNONYM SPECIES 9837:8RKF7 nidx=null parent=3D8R8]
 + Euscelis (Hemiphanes) heptneri Zakhvatkin, 1945 [SYNONYM SPECIES 9839:9G5DZ nidx=null parent=9G5F2]
Euscelis (Mehiphanes) heptneri
 - Euscelis (Mehiphanes) heptneri Zachvatkin, 1945 [ACCEPTED SPECIES 9837:3D8R8 nidx=null]
 + Euscelis (Mehiphanes) heptneri Zakhvatkin, 1945 [ACCEPTED SPECIES 9839:9G5F2 nidx=null]
Euscelis (Streptanus) okaensis
 - Euscelis (Streptanus) okaensis (Zachvatkin, 1948) [SYNONYM SPECIES 9837:8RKFH nidx=null parent=8RNLH]
 + Euscelis (Streptanus) okaensis (Zakhvatkin, 1948) [SYNONYM SPECIES 9839:9G95S nidx=null parent=8RNLH]
Euscelis heptneri
 - Euscelis heptneri Zachvatkin, 1945 [SYNONYM SPECIES 9837:8RSXJ nidx=null parent=3D8R8]
 + Euscelis heptneri Zakhvatkin, 1945 [SYNONYM SPECIES 9839:9G5F3 nidx=null parent=9G5F2]
Euscelis plebejus
 - Euscelis plebejus Kirschbaum, 1858 [SYNONYM SPECIES 9837:8RKHX nidx=null parent=8RKGV]
 + Euscelis plebejus Fallén, 1806 [SYNONYM SPECIES 9839:9G7T2 nidx=null parent=8RKGV]
Euthria obesa
 - Euthria obesa (Sowerby, 1839) [SYNONYM SPECIES 9837:99HWP nidx=null parent=XD3K]
 + Euthria obesa (G. B. Sowerby II, 1880) [SYNONYM SPECIES 9839:9G4S7 nidx=null parent=XD3K]
Fauxulus (Fauxulus) capensis var. pottebergensis
 - Fauxulus (Fauxulus) capensis var. pottebergensis F. Krauss in Kuster, 1841 [SYNONYM VARIETY 9837:852KQ nidx=null parent=3DWB7]
 + Fauxulus (Fauxulus) capensis var. pottebergensis Kuster, 1841 [SYNONYM VARIETY 9839:9G6VC nidx=null parent=3DWB7]
Fauxulus kurrii
 - Fauxulus kurrii (F. Krauss in L. Pfeiffer, 1842) [SYNONYM SPECIES 9837:8P5DF nidx=null parent=3DWB7]
 + Fauxulus kurrii (L. Pfeiffer, 1842) [SYNONYM SPECIES 9839:9G4S8 nidx=null parent=3DWB7]
Favorinus albus
 - Favorinus albus Odhner, 1914 [AMBIGUOUS_SYNONYM SPECIES 9837:3DWYX nidx=null parent=35J5K]
 + Favorinus albus [SYNONYM SPECIES 9839:9G4SC nidx=null parent=35J5K]
Fdwardsiana
 - Fdwardsiana Zachvatkin, 1929 [SYNONYM GENUS 9837:8JL6S nidx=null parent=8HHX6]
 + Fdwardsiana Zakhvatkin, 1929 [SYNONYM GENUS 9839:9G7RJ nidx=null parent=9G364]
Ficus (Priscoficus) smithii
 - Ficus (Priscoficus) smithii (Sowerby J. de C., 1827) [SYNONYM SPECIES 9837:8YYHV nidx=null parent=8YJZF]
 + Ficus (Priscoficus) smithii (J. de C. Sowerby, 1827) [SYNONYM SPECIES 9839:9G5YW nidx=null parent=8YJZF]
Fidicina lyricen
 - Fidicina lyricen (DeGeer, 1773) [SYNONYM SPECIES 9837:8JSJR nidx=null parent=8K2K8]
 + Fidicina lyricen (De Geer, 1773) [SYNONYM SPECIES 9839:9G95W nidx=null parent=9G8M6]
Flabellina versicolor
 - Flabellina versicolor Costa A., 1866 [SYNONYM SPECIES 9837:6J6QV nidx=null parent=3DWZ2]
 + Flabellina versicolor A. Costa, 1866 [SYNONYM SPECIES 9839:9G4T8 nidx=null parent=3DWZ2]
Fragum fornicatum
 - Fragum fornicatum (Sowerby, 1840) [SYNONYM SPECIES 9837:6JLLR nidx=null parent=3257D]
 + Fragum fornicatum (G. B. Sowerby II, 1840) [SYNONYM SPECIES 9839:9G4TD nidx=null parent=3257D]
Francesia balanus
 - Francesia balanus (Reeve, 1860) [SYNONYM SPECIES 9837:8THCY nidx=null parent=RZN5]
 + Francesia balanus (Reeve, 1850) [SYNONYM SPECIES 9839:9G962 nidx=null parent=RZN5]
Fruticidia
 - Fruticidia Zachvatkin, 1947 [SYNONYM GENUS 9837:8K3KR nidx=null parent=8JMP4]
 + Fruticidia Zakhvatkin, 1947 [SYNONYM GENUS 9839:9G7RK nidx=null parent=9G38F]
Frutioidea
 - Frutioidea Zachvatkin, 1946 [SYNONYM GENUS 9837:8KHGC nidx=null parent=8JMP4]
 + Frutioidea Zakhvatkin, 1946 [SYNONYM GENUS 9839:9G7RL nidx=null parent=9G38F]
Frutioidia
 - Frutioidia Zachvatkin, 1946 [ACCEPTED GENUS 9837:8HJVD nidx=null]
 + Frutioidia Zakhvatkin, 1946 [ACCEPTED GENUS 9839:9G38C nidx=null]
Frutioidia (Frutioidia)
 - Frutioidia (Frutioidia) Zachvatkin, 1946 [ACCEPTED SUBGENUS 9837:8JMP4 nidx=null]
 - Frutioidia (Frutioidia) Zachvatkin, 1946 [SYNONYM INFRAGENERIC_NAME 9837:8RGZ9 nidx=null parent=8JMP4]
 + Frutioidia (Frutioidia) Zakhvatkin, 1946 [ACCEPTED SUBGENUS 9839:9G38F nidx=null]
Fulana
 - Fulana [ACCEPTED GENUS 9837:8KJWY nidx=null]
 + Fulana Gonçalves, Domahovski, Mejdalani & Takiya, 2021 [ACCEPTED GENUS 9839:9G7RM nidx=null]
Fuscmacula
 - Fuscmacula [ACCEPTED GENUS 9837:8RRBB nidx=null]
 + Fuscmacula Yao, Zhang & Xing, 2021 [ACCEPTED GENUS 9839:9G7RN nidx=null]
Fusinus anni
 - Fusinus anni [sic] [SYNONYM SPECIES 9837:6K653 nidx=null parent=6K64R]
 + Fusinus anni M. A. Snyder, 1986 [SYNONYM SPECIES 9839:9G4TK nidx=null parent=6K64R]
Fusinus asper
 - Fusinus asper (Sowerby J., 1821) [ACCEPTED SPECIES 9837:8YMHY nidx=null]
 + Fusinus asper (J. Sowerby, 1821) [ACCEPTED SPECIES 9839:9GBY5 nidx=null]
Fusiturris similis
 - Fusiturris similis (Bivona Ant. in Bivona And., 1838) [ACCEPTED SPECIES 9837:6JTX2 nidx=null]
 + Fusiturris similis (Ant. Bivona, 1838) [ACCEPTED SPECIES 9839:9G4TM nidx=null]
Fusiturris undatiruga
 - Fusiturris undatiruga (Bivona Ant. in Bivona And., 1838) [ACCEPTED SPECIES 9837:6K68Q nidx=null]
 + Fusiturris undatiruga (Ant. Bivona, 1838) [ACCEPTED SPECIES 9839:9G4TN nidx=null]
Fustiaria splendida
 - Fustiaria splendida (Sowerby, 1832) [SYNONYM SPECIES 9837:6K5XM nidx=null parent=6L4VK]
 + Fustiaria splendida (G. B. Sowerby I, 1832) [SYNONYM SPECIES 9839:9G4TP nidx=null parent=6L4VK]
Fusus (Sipho) pupula
 - Fusus (Sipho) pupula Fischer P., 1883 [SYNONYM SPECIES 9837:6JTJ6 nidx=null parent=XD3M]
 + Fusus (Sipho) pupula P. Fischer, 1883 [SYNONYM SPECIES 9839:9G4TQ nidx=null parent=XD3M]
Fusus asper
 - Fusus asper Sowerby J., 1821 [SYNONYM SPECIES 9837:8ZF7V nidx=null parent=8YMHY]
 + Fusus asper J. Sowerby, 1821 [SYNONYM SPECIES 9839:9GCM4 nidx=null parent=9GBY5]
Fusus jeffreysianus
 - Fusus jeffreysianus Fischer P., 1868 [SYNONYM SPECIES 9837:6K5NL nidx=null parent=XD3M]
 + Fusus jeffreysianus P. Fischer, 1868 [SYNONYM SPECIES 9839:9G4TS nidx=null parent=XD3M]
Fusus pagoda
 - Fusus pagoda Lesson, 1831 [SYNONYM SPECIES 9837:6JTNN nidx=null parent=XBJC]
 + Fusus pagoda Lesson, 1833 [SYNONYM SPECIES 9839:9G4TT nidx=null parent=9G4GF]
Galba vahlii
 - Galba vahlii (Beck in Møller, 1842) [SYNONYM SPECIES 9837:7RD8N nidx=null parent=7H8Z2]
 + Galba vahlii (Møller, 1842) [SYNONYM SPECIES 9839:9G4VH nidx=null parent=7H8Z2]
Galene dorsalis
 - Galene dorsalis White, 1861 [SYNONYM SPECIES 9837:3F3HF nidx=null parent=3BYGM]
 + Galene dorsalis (White, 1849) [SYNONYM SPECIES 9839:9G4VJ nidx=null parent=3BYGM]
Geotrochus tomasinellianus
 - Geotrochus tomasinellianus (Brazier, 1877) [SYNONYM SPECIES 9837:7RDX2 nidx=null parent=7QKBC]
 + Geotrochus tomasinellianus (Tapparone Canefri, 1883) [SYNONYM SPECIES 9839:9G967 nidx=null parent=7QKBC]
Gibbosula tibetica
 - Gibbosula tibetica (F.-X. Gu, 1976) [ACCEPTED SPECIES 9837:878KX nidx=null]
 + Gibbosula tibetica (Z.-W. Gu, 1976) [ACCEPTED SPECIES 9839:9G968 nidx=null]
Gibbula multistriata
 - Gibbula multistriata Wood in Kendall & Bell, 1886 [ACCEPTED SPECIES 9837:7RF5C nidx=null]
 + Gibbula multistriata (Harmer, 1923) [ACCEPTED SPECIES 9839:9G969 nidx=null]
Gibbulina (Gonidomus) dupontiana
 - Gibbulina (Gonidomus) dupontiana [SYNONYM SPECIES 9837:8M3Z3 nidx=null parent=3GZMW]
 + Gibbulina (Gonidomus) dupontiana (G. Nevill, 1881) [SYNONYM SPECIES 9839:9G96B nidx=null parent=3GZMW]
Gittenedouardia caffra
 - Gittenedouardia caffra (F. Krauss in L. Pfeiffer, 1848) [ACCEPTED SPECIES 9837:3G43B nidx=null]
 + Gittenedouardia caffra (L. Pfeiffer, 1848) [ACCEPTED SPECIES 9839:9G4VS nidx=null]
Gittenedouardia natalensis
 - Gittenedouardia natalensis (F. Krauss in L. Pfeiffer, 1846) [ACCEPTED SPECIES 9837:3G43R nidx=null]
 + Gittenedouardia natalensis (L. Pfeiffer, 1846) [ACCEPTED SPECIES 9839:9G4VT nidx=null]
Globothalamea
 - Globothalamea Pawlowski, Holzmann & Tyszka, 2013 [ACCEPTED CLASS 9837:7NFS5 nidx=null]
 + Globothalamea Pawlowski, Holzmann & Tyszka, 2013 [ACCEPTED CLASS 9839:9FZZ9 nidx=null]
Glossodoris lata
 - Glossodoris lata (Risbec, 1827) [SYNONYM SPECIES 9837:3GDKX nidx=null parent=5YHMP]
 + Glossodoris lata (Risbec, 1928) [SYNONYM SPECIES 9839:9G4WC nidx=null parent=5YHMP]
Glyptophysa (Glyptophysa) vandiemenensis
 - Glyptophysa (Glyptophysa) vandiemenensis (Sowerby, 1874) [SYNONYM SPECIES 9837:6KLS8 nidx=null parent=3GHY3]
 + Glyptophysa (Glyptophysa) vandiemenensis (G. B. Sowerby II, 1873) [SYNONYM SPECIES 9839:9G4WD nidx=null parent=3GHY3]
Gonaxis prostratus
 - Gonaxis prostratus (Gould in L. Pfeiffer, 1856) [ACCEPTED SPECIES 9837:6KQPN nidx=null]
 + Gonaxis prostratus (L. Pfeiffer, 1856) [ACCEPTED SPECIES 9839:9G4WM nidx=null]
Goniaeolis typica
 - Goniaeolis typica Sars M., 1861 [ACCEPTED SPECIES 9837:3GVB4 nidx=null]
 + Goniaeolis typica M. Sars, 1861 [ACCEPTED SPECIES 9839:9G4WN nidx=null]
Goniobasis tenuicarinata
 - Goniobasis tenuicarinata (Meek & Hayden, 1858) [SYNONYM SPECIES 9837:3GW2X nidx=null parent=3V7GG]
 + Goniobasis tenuicarinata (Meek & Hayden, 1857) [SYNONYM SPECIES 9839:9G4WQ nidx=null parent=3V7GG]
Gorgonia clavata
 - Gorgonia clavata Risso, 1826 [SYNONYM SPECIES 9837:8RW3B nidx=null parent=4D452]
 + Gorgonia clavata Risso, 1827 [SYNONYM SPECIES 9839:9G96F nidx=null parent=9G5Q6]
Grandinenia dautzenbergi
 - Grandinenia dautzenbergi (Morlet, 1892) [ACCEPTED SPECIES 9837:3H7R3 nidx=null]
 + Grandinenia dautzenbergi (Morlet, 1893) [ACCEPTED SPECIES 9839:9G4WT nidx=null]
Grandinenia dautzenbergi dautzenbergi
 - Grandinenia dautzenbergi dautzenbergi (Morlet, 1892) [ACCEPTED SUBSPECIES 9837:7H7JW nidx=null]
 + Grandinenia dautzenbergi dautzenbergi (Morlet, 1893) [ACCEPTED SUBSPECIES 9839:9G6QK nidx=null]
Granulina cartwrighti
 - Granulina cartwrighti (Sowerby, 1915) [ACCEPTED SPECIES 9837:6KRYN nidx=null]
 + Granulina cartwrighti (G. B. Sowerby III, 1915) [ACCEPTED SPECIES 9839:9G4WV nidx=null]
Grapsus laevigatus
 - Grapsus laevigatus Spinola in White, 1847 [SYNONYM SPECIES 9837:6L57W nidx=null parent=92VNK]
 + Grapsus laevigatus White, 1847 [SYNONYM SPECIES 9839:9G4WW nidx=null parent=92VNK]
Grumichellini
 - Grumichellini Morse, 1981 [ACCEPTED TRIBE 9837:628DL nidx=null]
 + Grumichellini Morse, 1981 [ACCEPTED TRIBE 9839:9G6Z8 nidx=null]
Guanolichidae
 - Guanolichidae [ACCEPTED FAMILY 9837:625CQ nidx=null]
 + Guanolichidae Fain, 1968 [ACCEPTED FAMILY 9839:9G7L3 nidx=null]
Guillarmodia polita
 - Guillarmodia polita (Strebel, 1875) [ACCEPTED SPECIES 9837:3HL6G nidx=null]
 + Guillarmodia polita (Strebel, 1878) [ACCEPTED SPECIES 9839:9G4X2 nidx=null]
Guyalna rufapicalis
 - Guyalna rufapicalis Boulard, 1998 [ACCEPTED SPECIES 9837:3HN7M nidx=null]
 + Guyalna rufapicalis Boulard, 2001 [ACCEPTED SPECIES 9839:9G8DP nidx=null]
Gymnotoplax barashi
 - Gymnotoplax barashi Marcus Ev., 1977 [SYNONYM SPECIES 9837:3HVJR nidx=null parent=4KB4F]
 + Gymnotoplax barashi Ev. Marcus, 1977 [SYNONYM SPECIES 9839:9G4XG nidx=null parent=4KB4F]
Gyroidinoides vigens
 - Gyroidinoides vigens Kisselman & Freyman in Kisselman, 1974 [ACCEPTED SPECIES 9837:82PRC nidx=null]
 + Gyroidinoides vigens Kiselman & Freyman in Kiselman, 1974 [ACCEPTED SPECIES 9839:9G4XM nidx=null]
Hadroocorys verrilli
 - Hadroocorys verrilli [SYNONYM SPECIES 9837:3J793 nidx=null parent=49RSZ]
 + Hadroocorys verrilli [sic] [SYNONYM SPECIES 9839:9G4XN nidx=null parent=49RSZ]
Halectinosoma curticorne
 - Halectinosoma curticorne (Boeck, 1873) [ACCEPTED SPECIES 9837:3JB8H nidx=null]
 + Halectinosoma curticorne (Boeck, 1872) [ACCEPTED SPECIES 9839:9G4XP nidx=null]
Halicardia axinoides
 - Halicardia axinoides (Seguenza G., 1876) [ACCEPTED SPECIES 9837:3JBMQ nidx=null]
 + Halicardia axinoides (G. Seguenza, 1876) [ACCEPTED SPECIES 9839:9G4XQ nidx=null]
Halistylus pupoides
 - Halistylus pupoides [SYNONYM SPECIES 9837:6KZ4Q nidx=null parent=6KZ52]
 + Halistylus pupoides [sic] [SYNONYM SPECIES 9839:9G4XX nidx=null parent=6KZ52]
Haminoea natalensis
 - Haminoea natalensis (F. Krauss, 1848) [ACCEPTED SPECIES 9837:7RH6X nidx=null]
 + Haminoea natalensis (Krauss, 1848) [ACCEPTED SPECIES 9839:3JHP7 nidx=null]
Handianus (Dlabolia) cytisi
 - Handianus (Dlabolia) cytisi Zachvatkin, 1948 [ACCEPTED SPECIES 9837:3JJP8 nidx=null]
 + Handianus (Dlabolia) cytisi Zakhvatkin, 1948 [ACCEPTED SPECIES 9839:9G5NV nidx=null]
Handianus (Dlabolia) ignoscus
 - Handianus (Dlabolia) ignoscus (Fieber, 1869) [SYNONYM SPECIES 9837:8RB2Q nidx=null parent=8RKW3]
 + Handianus (Dlabolia) ignoscus (Fieber, 1869) [ACCEPTED SPECIES 9839:3JJPB nidx=null]
Handianus cytisi
 - Handianus cytisi Zachvatkin, 1948 [SYNONYM SPECIES 9837:8RQKF nidx=null parent=3JJP8]
 + Handianus cytisi Zakhvatkin, 1948 [SYNONYM SPECIES 9839:9G5NT nidx=null parent=9G5NV]
Handlirschiina
 - Handlirschiina Nemkov & Lelej, 1996 [ACCEPTED SUBTRIBE 9837:LDP nidx=null]
 + Handlirschiina Nemkov & Lelej, 1996 [ACCEPTED SUBTRIBE 9839:9G6ZY nidx=null]
Hardya (Eohardya)
 - Hardya (Eohardya) Zachvatkin, 1946 [ACCEPTED SUBGENUS 9837:8RGZW nidx=null]
 + Hardya (Eohardya) Zakhvatkin, 1946 [SYNONYM SUBGENUS 9839:9G7ZQ nidx=null parent=9G7ZP]
Hardya (Eohardya) byzantina
 - Hardya (Eohardya) byzantina Zachvatkin, 1946 [SYNONYM SPECIES 9837:8RKWK nidx=null parent=8RKWL]
 + Hardya (Eohardya) byzantina Zakhvatkin, 1946 [SYNONYM SPECIES 9839:9G8DR nidx=null parent=9F2KL]
Hardya (Eohardya) mira
 - Hardya (Eohardya) mira Zachvatkin, 1946 [SYNONYM SPECIES 9837:8RKWM nidx=null parent=8RKWL]
 + Hardya (Eohardya) mira Zakhvatkin, 1946 [SYNONYM SPECIES 9839:9G8DS nidx=null parent=9F2KL]
Hardya (Mimohardya)
 - Hardya (Mimohardya) Zachvatkin, 1946 [SYNONYM SUBGENUS 9837:8RRQL nidx=null parent=8RGPJ]
 + Hardya (Mimohardya) Zakhvatkin, 1946 [SYNONYM SUBGENUS 9839:9G7TJ nidx=null parent=9G7TH]
Hardya (Mimohardya) heptneri
 - Hardya (Mimohardya) heptneri Zachvatkin, 1946 [SYNONYM SPECIES 9837:8RRQ6 nidx=null parent=8RLY8]
 + Hardya (Mimohardya) heptneri Zakhvatkin, 1946 [SYNONYM SPECIES 9839:9G96M nidx=null parent=9G9BT]
Hardya hepneri
 - Hardya hepneri Zachvatkin, 1946 [SYNONYM SPECIES 9837:8RVBZ nidx=null parent=8RLY8]
 + Hardya hepneri (Zakhvatkin, 1946) [SYNONYM SPECIES 9839:9G96P nidx=null parent=9G9BT]
Hardya heptneri
 - Hardya heptneri Zachvatkin, 1946 [SYNONYM SPECIES 9837:8RKWT nidx=null parent=8RLY8]
 + Hardya heptneri Zakhvatkin, 1946 [SYNONYM SPECIES 9839:9G96N nidx=null parent=9G9BT]
Harpulina lapponica lapponica
 - Harpulina lapponica lapponica (Linnaeus, 1767) [ACCEPTED SUBSPECIES 9837:7TVW9 nidx=null]
 + Harpulina lapponica lapponica (Linnaeus, 1767) [SYNONYM SUBSPECIES 9839:5HLLG nidx=null parent=6LFYT]
Hebata (Alboneurasca) minor
 - Hebata (Alboneurasca) minor (Zachvatkin, 1935) [ACCEPTED SPECIES 9837:8KJQ6 nidx=null]
 + Hebata (Alboneurasca) minor (Zakhvatkin, 1935) [ACCEPTED SPECIES 9839:9G96Q nidx=null]
Hebata (Alboneurasca) punjabensis turanica
 - Hebata (Alboneurasca) punjabensis turanica (Zachvatkin, 1947) [ACCEPTED SUBSPECIES 9837:8KL6H nidx=null]
 + Hebata (Alboneurasca) punjabensis turanica (Zakhvatkin, 1947) [ACCEPTED SUBSPECIES 9839:9G9MQ nidx=null]
Hebata (Alboneurasca) uzbekorum
 - Hebata (Alboneurasca) uzbekorum (Zachvatkin, 1953) [ACCEPTED SPECIES 9837:8KHR3 nidx=null]
 + Hebata (Alboneurasca) uzbekorum (Zakhvatkin, 1953) [ACCEPTED SPECIES 9839:9G96R nidx=null]
Hecaloidella brunnifacialis
 - Hecaloidella brunnifacialis Shang & Zhang, 2021 [ACCEPTED SPECIES 9837:8KK7G nidx=null]
 + Hecaloidella brunnifacialis Shang & Zhang, 2012 [ACCEPTED SPECIES 9839:9G96S nidx=null]
Helicina (Geophorus) acuta
 - Helicina (Geophorus) acuta (L. Pfeiffer, 1848) [SYNONYM SPECIES 9837:7RHSC nidx=null parent=7RDSJ]
 + Helicina (Geophorus) acuta (L. Pfeiffer, 1849) [SYNONYM SPECIES 9839:9G96W nidx=null parent=7RDSJ]
Helicina nesiotica wolfi
 - Helicina nesiotica wolfi Reibisch, 1892 [ACCEPTED SUBSPECIES 9837:8V2JY nidx=null]
 + Helicina nesiotica wolfi Reibisch, 1893 [ACCEPTED SUBSPECIES 9839:9G9MR nidx=null]
Helicina wolfi
 - Helicina wolfi Reibisch, 1892 [SYNONYM SPECIES 9837:8TNS4 nidx=null parent=8V2JY]
 + Helicina wolfi Reibisch, 1893 [SYNONYM SPECIES 9839:9G96X nidx=null parent=9G9MR]
Helicodiscus fimbriatus var. salmonensis
 - Helicodiscus fimbriatus var. salmonensis W. G. Binney, 1890 [SYNONYM VARIETY 9837:7V6VJ nidx=null parent=7RJ68]
 + Helicodiscus fimbriatus var. salmonensis Hemphill, 1890 [SYNONYM VARIETY 9839:9G6VD nidx=null parent=9G4YC]
Helicodiscus salmonaceus
 - Helicodiscus salmonaceus W. G. Binney, 1890 [ACCEPTED SPECIES 9837:7RJ68 nidx=null]
 + Helicodiscus salmonaceus Hemphill, 1890 [ACCEPTED SPECIES 9839:9G4YC nidx=null]
Helicostyla fischeri
 - Helicostyla fischeri (Hidalgo, 1889) [SYNONYM SPECIES 9837:7RJFT nidx=null parent=7R4LK]
 + Helicostyla fischeri (Hidalgo, 1890) [SYNONYM SPECIES 9839:9G4YD nidx=null parent=7R4LK]
Helionidea
 - Helionidea Zachvatkin, 1946 [SYNONYM GENUS 9837:8JL98 nidx=null parent=8HKCV]
 + Helionidea Zakhvatkin, 1946 [SYNONYM GENUS 9839:9G7RS nidx=null parent=9G3B5]
Helionidia
 - Helionidia Zachvatkin, 1946 [ACCEPTED GENUS 9837:8HKCV nidx=null]
 + Helionidia Zakhvatkin, 1946 [ACCEPTED GENUS 9839:9G3B5 nidx=null]
Helionidia (Helionidia)
 - Helionidia (Helionidia) Zachvatkin, 1946 [SYNONYM SUBGENUS 9837:8KGWD nidx=null parent=8HKCV]
 + Helionidia (Helionidia) Zakhvatkin, 1946 [SYNONYM INFRAGENERIC_NAME 9839:9G3B6 nidx=null parent=9G3B5]
Helionidia (Helionidia) himyarita
 - Helionidia (Helionidia) himyarita Zachvatkin, 1946 [SYNONYM SPECIES 9837:8KHRX nidx=null parent=3KBFM]
 + Helionidia (Helionidia) himyarita Zakhvatkin, 1946 [SYNONYM SPECIES 9839:9G5PF nidx=null parent=9G5PG]
Helionidia (Helionidia) statices
 - Helionidia (Helionidia) statices Zachvatkin, 1946 [SYNONYM SPECIES 9837:6LL3G nidx=null parent=54M8L]
 + Helionidia (Helionidia) statices Zakhvatkin, 1953 [SYNONYM SPECIES 9839:9G5PJ nidx=null parent=9G752]
 + Helionidia (Helionidia) statices Zakhvatkin, 1946 [SYNONYM SPECIES 9839:9G5PK nidx=null parent=9G752]
Helionidia (Tamaricella)
 - Helionidia (Tamaricella) Zachvatkin, 1946 [SYNONYM SUBGENUS 9837:8KMYT nidx=null parent=8HRRX]
 + Helionidia (Tamaricella) Zakhvatkin, 1946 [SYNONYM SUBGENUS 9839:9G3PM nidx=null parent=9G3PL]
Helionidia (Tamaricella) ribauti
 - Helionidia (Tamaricella) ribauti Zachvatkin, 1947 [SYNONYM SPECIES 9837:6LL3C nidx=null parent=54M8J]
 + Helionidia (Tamaricella) ribauti Zakhvatkin, 1947 [SYNONYM SPECIES 9839:9G5PH nidx=null parent=9G74Z]
Helionidia himyarita
 - Helionidia himyarita Zachvatkin, 1946 [ACCEPTED SPECIES 9837:3KBFM nidx=null]
 + Helionidia himyarita Zakhvatkin, 1946 [ACCEPTED SPECIES 9839:9G5PG nidx=null]
Helionidia jaxartensis astrachanica
 - Helionidia jaxartensis astrachanica Zachvatkin, 1953 [SYNONYM SUBSPECIES 9837:5HMT3 nidx=null parent=7BJGF]
 + Helionidia jaxartensis astrachanica Zakhvatkin, 1953 [SYNONYM SUBSPECIES 9839:9G7K5 nidx=null parent=9G74Y]
Helionidial
 - Helionidial Zachvatkin, 1946 [SYNONYM GENUS 9837:8JL99 nidx=null parent=8HKCV]
 + Helionidial Zakhvatkin, 1946 [SYNONYM GENUS 9839:9G7RT nidx=null parent=9G3B5]
Helix (Papuina) phaeostoma
 - Helix (Papuina) phaeostoma Martens, 1878 [SYNONYM SPECIES 9837:3KDNR nidx=null parent=3YTRM]
 + Helix (Papuina) phaeostoma L. Pfeiffer, 1877 [SYNONYM SPECIES 9839:9G4YG nidx=null parent=3YTRM]
Helix (Trochomorpha) conicoides
 - Helix (Trochomorpha) conicoides Metcalfe, 1851 [SYNONYM SPECIES 9837:7RKCN nidx=null parent=3FTBC]
 + Helix (Trochomorpha) conicoides Metcalfe, 1852 [SYNONYM SPECIES 9839:9G4YH nidx=null parent=3FTBC]
Helix (Trochomorpha) helicoides
 - Helix (Trochomorpha) helicoides Metcalfe, 1851 [SYNONYM SPECIES 9837:7RKCP nidx=null parent=3FTBC]
 + Helix (Trochomorpha) helicoides Metcalfe, 1852 [SYNONYM SPECIES 9839:9G96Z nidx=null parent=3FTBC]
Helix damnata
 - Helix damnata Brongniart, 1810 [SYNONYM SPECIES 9837:6LMGC nidx=null parent=34TSM]
 + Helix damnata Brongniart, 1823 [SYNONYM SPECIES 9839:9G4YJ nidx=null parent=34TSM]
Helix forabilis
 - Helix forabilis Benson, 1959 [SYNONYM SPECIES 9837:7RLFV nidx=null parent=7T6VM]
 + Helix forabilis Benson, 1859 [SYNONYM SPECIES 9839:9G972 nidx=null parent=7T6VM]
Helix malbatensis
 - Helix malbatensis Hidalgo, 1891 [SYNONYM SPECIES 9837:7RLY8 nidx=null parent=7QNP5]
 + Helix malbatensis Hidalgo, 1890 [SYNONYM SPECIES 9839:9G96Y nidx=null parent=7QNP5]
Helix motacilla
 - Helix motacilla Pfeiffer, 1855 [SYNONYM SPECIES 9837:6LLWP nidx=null parent=75NPM]
 + Helix motacilla L. Pfeiffer, 1855 [SYNONYM SPECIES 9839:6LM8P nidx=null parent=75NPM]
Helix peliomphala var. luchuana
 - Helix peliomphala var. luchuana Martens, 1867 [SYNONYM VARIETY 9837:7V7BD nidx=null parent=7TV2W]
 + Helix peliomphala var. luchuana [sic] [SYNONYM VARIETY 9839:9G6VF nidx=null parent=7TV2W]
Helix uitenhagensis
 - Helix uitenhagensis F. Krauss in L. Pfeiffer, 1846 [SYNONYM SPECIES 9837:6LNHL nidx=null parent=5CCXN]
 + Helix uitenhagensis L. Pfeiffer, 1846 [SYNONYM SPECIES 9839:9G4YM nidx=null parent=9G6LW]
Helonyx subfusiformis
 - Helonyx subfusiformis (Sars M., 1865) [SYNONYM SPECIES 9837:3KH95 nidx=null parent=P7LP]
 + Helonyx subfusiformis (M. Sars, 1865) [SYNONYM SPECIES 9839:9G4YS nidx=null parent=P7LP]
Hemiodus amazonum
 - Hemiodus amazonum (Humboldt, 1821) [ACCEPTED SPECIES 9837:99JB6 nidx=null]
 + Hemiodus amazonum (Humboldt, 1821) [ACCEPTED SPECIES 9839:9G4Z2 nidx=null]
Hemisarcoptidae
 - Hemisarcoptidae [ACCEPTED FAMILY 9837:6253G nidx=null]
 + Hemisarcoptidae Oudemans, 1908 [ACCEPTED FAMILY 9839:9G269 nidx=null]
Hemithraupis
 - Hemithraupis Cabanis, 1850 [ACCEPTED GENUS 9837:4VFM nidx=null]
 + Hemithraupis Cabanis, 1851 [ACCEPTED GENUS 9839:9G3BC nidx=null]
Hemitrichia striatula striatula
 - Hemitrichia striatula striatula Möllendorff, 1890 [SYNONYM SUBSPECIES 9837:7TWCC nidx=null parent=7TWCP]
 + Hemitrichia striatula striatula (C. Semper, 1870) [SYNONYM SUBSPECIES 9839:9G9MS nidx=null parent=7TWCP]
Hemitrichiella purpurascens
 - Hemitrichiella purpurascens (Möllendorff, 1895) [ACCEPTED SPECIES 9837:7RNT5 nidx=null]
 + Hemitrichiella purpurascens (Möllendorff, 1890) [ACCEPTED SPECIES 9839:9G973 nidx=null]
Hermaea lutescens
 - Hermaea lutescens Costa A., 1866 [SYNONYM SPECIES 9837:3KZ9D nidx=null parent=4JDJ3]
 + Hermaea lutescens A. Costa, 1866 [SYNONYM SPECIES 9839:9G4Z5 nidx=null parent=4JDJ3]
Hermaea orbicularis
 - Hermaea orbicularis Costa A., 1866 [SYNONYM SPECIES 9837:3KZ9H nidx=null parent=4JDJ3]
 + Hermaea orbicularis A. Costa, 1866 [SYNONYM SPECIES 9839:9G4Z6 nidx=null parent=4JDJ3]
Hermaeopsis variopicta
 - Hermaeopsis variopicta Costa A., 1869 [SYNONYM SPECIES 9837:6M472 nidx=null parent=3KZ9N]
 + Hermaeopsis variopicta A. Costa, 1869 [SYNONYM SPECIES 9839:9G4Z7 nidx=null parent=3KZ9N]
Himalusini
 - Himalusini Klimaszewski, Pace & Center, 2010 [ACCEPTED TRIBE 9837:8X6MN nidx=null]
 + Himalusini Klimaszewski, Pace & Center, 2010 [ACCEPTED TRIBE 9839:9G6Z9 nidx=null]
Hiratettix arisanus
 - Hiratettix arisanus Matsumura, 1932 [SYNONYM SPECIES 9837:3M3PW nidx=null parent=3M3PV]
 + Hiratettix arisanus (Matsumura, 1931) [SYNONYM SPECIES 9839:9G5RR nidx=null parent=3M3PV]
Hirotettix
 - Hirotettix Matsumura, 1931 [SYNONYM GENUS 9837:8JLB2 nidx=null parent=8HKJY]
 + Hirotettix Matsumura, 1932 [SYNONYM GENUS 9839:9G7S7 nidx=null parent=9G3BJ]
Histiomena marginata
 - Histiomena marginata (Mörch, 1859) [ACCEPTED SPECIES 9837:3M5DX nidx=null]
 + Histiomena marginata (Ørsted & Mörch, 1859) [ACCEPTED SPECIES 9839:9G4ZT nidx=null]
Histiostomatidae
 - Histiostomatidae [ACCEPTED FAMILY 9837:B47 nidx=null]
 + Histiostomatidae Berlese, 1897 [ACCEPTED FAMILY 9839:9G26B nidx=null]
Homolodromiidae
 - Homolodromiidae [ACCEPTED FAMILY 9837:B5L nidx=null]
 - Homolodromiidae Alcock, 1899 [ACCEPTED FAMILY 9837:7NHV9 nidx=null]
 + Homolodromiidae Alcock, 1900 [ACCEPTED FAMILY 9839:9G26C nidx=null]
Hudsonemini
 - Hudsonemini Morse, 1981 [ACCEPTED TRIBE 9837:KVZ nidx=null]
 + Hudsonemini Morse, 1981 [ACCEPTED TRIBE 9839:9G6ZB nidx=null]
Huechys (Huechys) sanguinea
 - Huechys (Huechys) sanguinea (DeGeer, 1773) [SYNONYM SPECIES 9837:8J64Q nidx=null parent=8JJKB]
 + Huechys (Huechys) sanguinea (De Geer, 1773) [SYNONYM SPECIES 9839:3MSPN nidx=null parent=9G9MX]
Huechys sanginea
 - Huechys sanginea DeGeer, 1773 [SYNONYM SPECIES 9837:8J65G nidx=null parent=8JJKB]
 + Huechys sanginea De Geer, 1773 [SYNONYM SPECIES 9839:9G977 nidx=null parent=9G9MX]
Huechys sanguinea
 - Huechys sanguinea (DeGeer, 1773) [ACCEPTED SPECIES 9837:3MSPQ nidx=null]
 - Huechys sanguinea (DeGeer, 1773) [AMBIGUOUS_SYNONYM SPECIES 9837:8J65H nidx=null parent=8JJKB]
 + Huechys sanguinea (De Geer, 1773) [ACCEPTED SPECIES 9839:9G7ZL nidx=null]
Huechys sanguinea sanguinea
 - Huechys sanguinea sanguinea (DeGeer, 1773) [ACCEPTED SUBSPECIES 9837:8JJKB nidx=null]
 + Huechys sanguinea sanguinea (De Geer, 1773) [ACCEPTED SUBSPECIES 9839:9G9MX nidx=null]
Huechys sanquiena
 - Huechys sanquiena DeGeer, 1773 [SYNONYM SPECIES 9837:8J65L nidx=null parent=8JJKB]
 + Huechys sanquiena De Geer, 1773 [SYNONYM SPECIES 9839:9G978 nidx=null parent=9G9MX]
Huechys sanquinea
 - Huechys sanquinea DeGeer, 1773 [SYNONYM SPECIES 9837:8J65M nidx=null parent=8JJKB]
 + Huechys sanquinea De Geer, 1773 [SYNONYM SPECIES 9839:9G979 nidx=null parent=9G9MX]
Hyadesia
 - Hyadesia Megnin, 1889 [ACCEPTED GENUS 9837:4ZCC nidx=null]
 + Hyadesia Mégnin, 1891 [ACCEPTED GENUS 9839:9G3BR nidx=null]
 + Hyadesia Mégnin, 1891 [ACCEPTED SUBGENUS 9839:9G3BS nidx=null]
Hyadesiidae
 - Hyadesiidae [ACCEPTED FAMILY 9837:6256V nidx=null]
 + Hyadesiidae Halbert, 1915 [ACCEPTED FAMILY 9839:9G26F nidx=null]
Hyderodini
 - Hyderodini K. B. Miller, 2000 [SYNONYM TRIBE 9837:8KTR4 nidx=null parent=KSW]
 + Hyderodini K. B. Miller, 2000 [SYNONYM TRIBE 9839:9G6ZC nidx=null parent=KSW]
Hypocolpus pararugosus
 - Hypocolpus pararugosus Crosnier, 1997 [ACCEPTED SPECIES 9837:6N3MX nidx=null]
 + Hypocolpus pararugosus Crosnier, 1996 [ACCEPTED SPECIES 9839:9G548 nidx=null]
Iassargus
 - Iassargus Zachvatkin, 1933 [SYNONYM GENUS 9837:8RRLR nidx=null parent=8RH25]
 + Iassargus Zakhvatkin, 1933 [SYNONYM GENUS 9839:9G7SD nidx=null parent=9G3CD]
Iassus undatus
 - Iassus undatus (DeGeer, 1773) [SYNONYM SPECIES 9837:8RL72 nidx=null parent=8RMW2]
 + Iassus undatus (De Geer, 1773) [SYNONYM SPECIES 9839:9G97C nidx=null parent=9G6TN]
Idaliella amoenula
 - Idaliella amoenula Bergh, 1908 [SYNONYM SPECIES 9837:3PC4J nidx=null parent=492BJ]
 + Idaliella amoenula Bergh, 1907 [SYNONYM SPECIES 9839:9G54C nidx=null parent=9G5M2]
Incultus alcocki
 - Incultus alcocki (Nobili, 1905) [ACCEPTED SPECIES 9837:9CBCF nidx=null]
 + Incultus alcocki (Nobili, 1906) [ACCEPTED SPECIES 9839:9GDFH nidx=null]
Indopyrgus bonnei
 - Indopyrgus bonnei R. T. Abbott, 1845 [SYNONYM SPECIES 9837:8P6BH nidx=null parent=8Q7RF]
 + Indopyrgus bonnei R. T. Abbott, 1945 [SYNONYM SPECIES 9839:9G97K nidx=null parent=8Q7RF]
Iniforis violaceus
 - Iniforis violaceus [SYNONYM SPECIES 9837:6N7NT nidx=null parent=6MVNS]
 + Iniforis violaceus [sic] [SYNONYM SPECIES 9839:9G54P nidx=null parent=6MVNS]
Inquisitor elegans
 - Inquisitor elegans Bozzetti, 1994 [ACCEPTED SPECIES 9837:3PSF7 nidx=null]
 + Inquisitor elegans Bozzetti, 1993 [ACCEPTED SPECIES 9839:9G54Q nidx=null]
Ischnochiton (Stenosemus) exaratus
 - Ischnochiton (Stenosemus) exaratus (Sars G. O., 1878) [SYNONYM SPECIES 9837:3Q4KQ nidx=null parent=6ZN8W]
 + Ischnochiton (Stenosemus) exaratus (G. O. Sars, 1878) [SYNONYM SPECIES 9839:9G54S nidx=null parent=9G69Q]
Ischnochiton exaratus
 - Ischnochiton exaratus (Sars G. O., 1878) [SYNONYM SPECIES 9837:3Q4MS nidx=null parent=6ZN8W]
 + Ischnochiton exaratus (G. O. Sars, 1878) [SYNONYM SPECIES 9839:9G54R nidx=null parent=9G69Q]
Isidora natalensis
 - Isidora natalensis (F. Krauss in Kuster, 1841) [SYNONYM SPECIES 9837:7RRF9 nidx=null parent=NTP9]
 + Isidora natalensis (Kuster, 1841) [SYNONYM SPECIES 9839:9G54T nidx=null parent=9G49K]
Isoclanculus philippi
 - Isoclanculus philippi (Koch in Philippi, 1843) [SYNONYM SPECIES 9837:8KT52 nidx=null parent=VQSN]
 + Isoclanculus philippi [sic] [SYNONYM SPECIES 9839:9G97M nidx=null parent=VQSN]
Isotriphora guanahacahibes
 - Isotriphora guanahacahibes [SYNONYM SPECIES 9837:3QCVL nidx=null parent=3QCVK]
 + Isotriphora guanahacahibes [sic] [SYNONYM SPECIES 9839:9G54V nidx=null parent=3QCVK]
Itala itala
 - Itala itala (G. von Martens, 1877) [SYNONYM SPECIES 9837:993LS nidx=null parent=TPN3]
 + Itala itala (G. von Martens, 1824) [SYNONYM SPECIES 9839:9GDCK nidx=null parent=TPN3]
Japonacteon pusillus
 - Japonacteon pusillus [SYNONYM SPECIES 9837:3QLX6 nidx=null parent=3QLX3]
 + Japonacteon pusillus [sic] [SYNONYM SPECIES 9839:9G555 nidx=null parent=3QLX3]
Jassargus
 - Jassargus Zachvatkin, 1933 [SYNONYM GENUS 9837:8R5C4 nidx=null parent=8RH25]
 - Jassargus Zachvatkin, 1933 [ACCEPTED GENUS 9837:8R5C5 nidx=null]
 + Jassargus Zakhvatkin, 1933 [SYNONYM GENUS 9839:9G3CB nidx=null parent=9G3CD]
 + Jassargus Zakhvatkin, 1933 [ACCEPTED GENUS 9839:9G3CC nidx=null]
Jassargus (Jassargus)
 - Jassargus (Jassargus) Zachvatkin, 1933 [SYNONYM INFRAGENERIC_NAME 9837:8RH24 nidx=null parent=8RH25]
 - Jassargus (Jassargus) Zachvatkin, 1933 [ACCEPTED SUBGENUS 9837:8RH25 nidx=null]
 + Jassargus (Jassargus) Zakhvatkin, 1933 [ACCEPTED SUBGENUS 9839:9G3CD nidx=null]
Jassopsaltriini
 - Jassopsaltriini Moulds, 2005 [ACCEPTED TRIBE 9837:8JK9X nidx=null]
 + Jassopsaltriini Moulds, 2005 [ACCEPTED TRIBE 9839:9G6ZD nidx=null]
Jassus (Platymetopius) undata
 - Jassus (Platymetopius) undata (DeGeer, 1773) [SYNONYM SPECIES 9837:8RLDB nidx=null parent=8RMW2]
 + Jassus (Platymetopius) undata (De Geer, 1773) [SYNONYM SPECIES 9839:9G97P nidx=null parent=9G6TN]
Jassus chrysographus
 - Jassus chrysographus Parr. [SYNONYM SPECIES 9837:8JP62 nidx=null parent=6YDQ8]
 + Jassus chrysographus Spinola, 1850 [SYNONYM SPECIES 9839:9G97R nidx=null parent=6YDQ8]
Jassus undata
 - Jassus undata (DeGeer, 1773) [SYNONYM SPECIES 9837:8RLKD nidx=null parent=8RMW2]
 + Jassus undata (De Geer, 1773) [SYNONYM SPECIES 9839:9G97Q nidx=null parent=9G6TN]
Joculator ridicula
 - Joculator ridicula [SYNONYM SPECIES 9837:3QPSZ nidx=null parent=3QPT2]
 + Joculator ridicula [sic] [SYNONYM SPECIES 9839:9G556 nidx=null parent=3QPT2]
Jorunna funebris
 - Jorunna funebris (Kelaart, 1859) [ACCEPTED SPECIES 9837:3QQYC nidx=null]
 + Jorunna funebris (Kelaart, 1858) [ACCEPTED SPECIES 9839:9G558 nidx=null]
Julus punctatus
 - Julus punctatus Leach, 1815 [AMBIGUOUS_SYNONYM SPECIES 9837:3QT49 nidx=null parent=333C8]
 + Julus punctatus Leach, 1816 [SYNONYM SPECIES 9839:9G55D nidx=null parent=9G4KP]
Kentrodoris funebris
 - Kentrodoris funebris (Kelaart, 1859) [SYNONYM SPECIES 9837:3R5HY nidx=null parent=3QQYC]
 + Kentrodoris funebris (Kelaart, 1858) [SYNONYM SPECIES 9839:9G55T nidx=null parent=9G558]
Kerkophorus knysnaensis
 - Kerkophorus knysnaensis (Pretson, 1912) [ACCEPTED SPECIES 9837:6NL64 nidx=null]
 + Kerkophorus knysnaensis (Preston, 1912) [ACCEPTED SPECIES 9839:9G55V nidx=null]
Kimberpsaltria
 - Kimberpsaltria [ACCEPTED GENUS 9837:8RVCK nidx=null]
 + Kimberpsaltria Moulds, Marshall & Popple, 2021 [ACCEPTED GENUS 9839:9G7SL nidx=null]
Kingsleya besti
 - Kingsleya besti C Magalhães, 1986 [ACCEPTED SPECIES 9837:3R7ZD nidx=null]
 + Kingsleya besti Magalhães, 1990 [ACCEPTED SPECIES 9839:9G55X nidx=null]
Knefastia attenuata
 - Knefastia attenuata (Sowerby J., 1816) [ACCEPTED SPECIES 9837:8YMV4 nidx=null]
 + Knefastia attenuata (J. Sowerby, 1816) [ACCEPTED SPECIES 9839:9GBYG nidx=null]
Kunashiria japonica
 - Kunashiria japonica (von Martens in Clessin, 1874) [SYNONYM SPECIES 9837:7RSJX nidx=null parent=7QBTW]
 + Kunashiria japonica (Clessin, 1874) [SYNONYM SPECIES 9839:9G97S nidx=null parent=9G7G3]
Kuznetsovium
 - Kuznetsovium Zachvatkin, 1953 [SYNONYM GENUS 9837:8K3QY nidx=null parent=8JMWJ]
 + Kuznetsovium Zakhvatkin, 1953 [SYNONYM GENUS 9839:9G7SP nidx=null parent=8JMWJ]
Kyboasca
 - Kyboasca Zachvatkin, 1953 [ACCEPTED GENUS 9837:8HL9G nidx=null]
 + Kyboasca Zakhvatkin, 1953 [ACCEPTED GENUS 9839:9G3CK nidx=null]
Kyboasca (Polynia)
 - Kyboasca (Polynia) Zachvatkin, 1953 [SYNONYM SUBGENUS 9837:8KN89 nidx=null parent=8HDJ5]
 + Kyboasca (Polynia) Zakhvatkin, 1953 [SYNONYM SUBGENUS 9839:9G7ZS nidx=null parent=8HDJ5]
Kyboasca fedshenkoi
 - Kyboasca fedshenkoi Zachvatkin, 1953 [SYNONYM SPECIES 9837:8J6Y8 nidx=null parent=3RGRS]
 + Kyboasca fedshenkoi Zakhvatkin, 1953 [SYNONYM SPECIES 9839:9G62S nidx=null parent=9G62T]
Kyboasca fedtchenkoi
 - Kyboasca fedtchenkoi Zachvatkin, 1953 [SYNONYM SPECIES 9837:8RVDC nidx=null parent=3RGRS]
 + Kyboasca fedtchenkoi Zakhvatkin, 1953 [SYNONYM SPECIES 9839:9G97T nidx=null parent=9G62T]
Kyboasca fedtshenkoi
 - Kyboasca fedtshenkoi (Zachvatkin, 1953) [ACCEPTED SPECIES 9837:3RGRS nidx=null]
 + Kyboasca fedtshenkoi (Zakhvatkin, 1953) [ACCEPTED SPECIES 9839:9G62T nidx=null]
Kyboasca kiritshenkoi
 - Kyboasca kiritshenkoi (Zachvatkin, 1947) [ACCEPTED SPECIES 9837:3RGRW nidx=null]
 + Kyboasca kiritshenkoi (Zakhvatkin, 1947) [ACCEPTED SPECIES 9839:9G62V nidx=null]
Kyboasca tedtshenkoi
 - Kyboasca tedtshenkoi Zachvatkin, 1953 [SYNONYM SPECIES 9837:8J6YF nidx=null parent=3RGRS]
 + Kyboasca tedtshenkoi Zakhvatkin, 1953 [SYNONYM SPECIES 9839:9G62X nidx=null parent=9G62T]
Kybos abstrusus
 - Kybos abstrusus (Linnavuori, 1949) [ACCEPTED SPECIES 9837:3RGSH nidx=null]
 + Kybos abstrusus (Linnavuori, 1950) [ACCEPTED SPECIES 9839:9G62Z nidx=null]
Kybos betulae
 - Kybos betulae Zachvatkin, 1953 [SYNONYM SPECIES 9837:3RGT6 nidx=null parent=6NQBY]
 + Kybos betulae Zakhvatkin, 1953 [SYNONYM SPECIES 9839:9G632 nidx=null parent=6NQBY]
Kybos bipunctatus ulmicola
 - Kybos bipunctatus ulmicola Zachvatkin, 1953 [SYNONYM SUBSPECIES 9837:5J7PZ nidx=null parent=3RGRM]
 + Kybos bipunctatus ulmicola Zakhvatkin, 1953 [SYNONYM SUBSPECIES 9839:9G7KL nidx=null parent=3RGRM]
Kybos fedtshenkoi
 - Kybos fedtshenkoi Zachvatkin, 1953 [SYNONYM SPECIES 9837:6NQBF nidx=null parent=3RGRS]
 + Kybos fedtshenkoi Zakhvatkin, 1953 [SYNONYM SPECIES 9839:9G633 nidx=null parent=9G62T]
Kybos mesasiaticus
 - Kybos mesasiaticus Zachvatkin, 1953 [ACCEPTED SPECIES 9837:3RGV3 nidx=null]
 - Kybos mesasiaticus Zachvatkin, 1953 [AMBIGUOUS_SYNONYM SPECIES 9837:8J6YM nidx=null parent=3RGV3]
 + Kybos mesasiaticus Zakhvatkin, 1953 [ACCEPTED SPECIES 9839:9G634 nidx=null]
Kybos mesasiaticus mesasiaticus
 - Kybos mesasiaticus mesasiaticus Zachvatkin, 1953 [SYNONYM INFRASPECIFIC_NAME 9837:8JJKS nidx=null parent=3RGV3]
 + Kybos mesasiaticus mesasiaticus Zakhvatkin, 1953 [SYNONYM INFRASPECIFIC_NAME 9839:5J7Q3 nidx=null parent=9G634]
Kybos mucronatus verbae
 - Kybos mucronatus verbae Zachvatkin, 1953 [SYNONYM SUBSPECIES 9837:5J7Q4 nidx=null parent=3RGV7]
 + Kybos mucronatus verbae Zakhvatkin, 1953 [SYNONYM SUBSPECIES 9839:9G7KM nidx=null parent=3RGV7]
Kybos niveicolor
 - Kybos niveicolor Zachvatkin, 1953 [ACCEPTED SPECIES 9837:3RGV8 nidx=null]
 - Kybos niveicolor Zachvatkin, 1953 [AMBIGUOUS_SYNONYM SPECIES 9837:8J6YN nidx=null parent=8K2SG]
 + Kybos niveicolor Zakhvatkin, 1953 [ACCEPTED SPECIES 9839:9G635 nidx=null]
Kybos niveicolor niveicolor
 - Kybos niveicolor niveicolor Zachvatkin, 1953 [ACCEPTED SUBSPECIES 9837:8K2SG nidx=null]
 + Kybos niveicolor niveicolor Zakhvatkin, 1953 [ACCEPTED SUBSPECIES 9839:9G9N2 nidx=null]
Kybos oschanini
 - Kybos oschanini Zachvatkin, 1953 [SYNONYM SPECIES 9837:8J6YP nidx=null parent=3RGVG]
 + Kybos oschanini Zakhvatkin, 1953 [SYNONYM SPECIES 9839:9G636 nidx=null parent=9G637]
Kybos oshanini
 - Kybos oshanini Zachvatkin, 1953 [ACCEPTED SPECIES 9837:3RGVG nidx=null]
 + Kybos oshanini Zakhvatkin, 1953 [ACCEPTED SPECIES 9839:9G637 nidx=null]
Kybos oshanini mesasiatica
 - Kybos oshanini mesasiatica Zachvatkin, 1953 [SYNONYM SUBSPECIES 9837:5J7Q5 nidx=null parent=3RGV3]
 + Kybos oshanini mesasiatica Zakhvatkin, 1953 [SYNONYM SUBSPECIES 9839:9G7KN nidx=null parent=9G634]
Kybos oshanini occidentalis
 - Kybos oshanini occidentalis Zachvatkin, 1953 [SYNONYM SUBSPECIES 9837:5J7Q6 nidx=null parent=3RGT7]
 + Kybos oshanini occidentalis Zakhvatkin, 1953 [SYNONYM SUBSPECIES 9839:9G7KP nidx=null parent=3RGT7]
Kybos populi tremulae
 - Kybos populi tremulae Zachvatkin, 1953 [SYNONYM SUBSPECIES 9837:5J7Q7 nidx=null parent=3RGVN]
 + Kybos populi tremulae Zakhvatkin, 1953 [SYNONYM SUBSPECIES 9839:9G7KQ nidx=null parent=3RGVN]
Kybos topoli
 - Kybos topoli Zachvatkin, 1953 [AMBIGUOUS_SYNONYM SPECIES 9837:3RGWP nidx=null parent=3RGSH]
 + Kybos topoli Zakhvatkin, 1953 [AMBIGUOUS_SYNONYM SPECIES 9839:9G638 nidx=null parent=9G62Z]
Lambrus hexacanthus
 - Lambrus hexacanthus Costa & Costa, 1840 [SYNONYM SPECIES 9837:6NW35 nidx=null parent=7Y225]
 + Lambrus hexacanthus A. Costa in Hope, 1851 [SYNONYM SPECIES 9839:9G567 nidx=null parent=7Y225]
Lamellaria glacialis
 - Lamellaria glacialis Sars M., 1851 [SYNONYM SPECIES 9837:3RYY9 nidx=null parent=49FQZ]
 + Lamellaria glacialis M. Sars, 1851 [SYNONYM SPECIES 9839:9G568 nidx=null parent=49FQZ]
Lamellophyllia
 - Lamellophyllia Chevalier, 1962 [ACCEPTED GENUS 9837:85FS3 nidx=null]
 + Lamellophyllia Chevalier, 1961 [ACCEPTED GENUS 9839:9G7SQ nidx=null]
Lamellophyllia alloiteaui
 - Lamellophyllia alloiteaui Chevalier, 1962 [ACCEPTED SPECIES 9837:8K4DJ nidx=null]
 + Lamellophyllia alloiteaui Chevalier, 1961 [ACCEPTED SPECIES 9839:9G97W nidx=null]
Lasioserica pilosella
 - Lasioserica pilosella (Brenske, 1894) [ACCEPTED SPECIES 9837:3SGCB nidx=null]
 + Lasioserica pilosella (Brenske, 1896) [ACCEPTED SPECIES 9839:9G4RP nidx=null]
Latalus (Adarrus) ocellaris
 - Latalus (Adarrus) ocellaris (Lethierry, 1880) [SYNONYM SPECIES 9837:8JVJH nidx=null parent=8JX92]
 + Latalus (Adarrus) ocellaris (Fallén, 1806) [SYNONYM SPECIES 9839:9G83H nidx=null parent=8RKCT]
Lehmannia valentiana
 - Lehmannia valentiana (A. Férussac, 1822) [SYNONYM SPECIES 9837:3SXH5 nidx=null parent=CL6W]
 + Lehmannia valentiana (A. Férussac, 1821) [SYNONYM SPECIES 9839:9G56P nidx=null parent=CL6W]
Leiostraca producta
 - Leiostraca producta Carpenter, 1863 [SYNONYM SPECIES 9837:7RVDS nidx=null parent=7S48M]
 + Leiostraca producta P. P. Carpenter, 1865 [SYNONYM SPECIES 9839:9G56Q nidx=null parent=7S48M]
Lenticulina inusitata
 - Lenticulina inusitata Kisselman, 1962 [ACCEPTED SPECIES 9837:9F4FQ nidx=null]
 + Lenticulina inusitata Kiselman, 1962 [ACCEPTED SPECIES 9839:9G97Y nidx=null]
Lepadogaster candolii
 - Lepadogaster candolii Risso, 1810 [ACCEPTED SPECIES 9837:9CRTR nidx=null]
 + Lepadogaster candolii Risso, 1810 [ACCEPTED SPECIES 9839:9G57C nidx=null]
Lepidozona elenensis
 - Lepidozona elenensis (Sowerby, 1832) [SYNONYM SPECIES 9837:6PBN9 nidx=null parent=68VYY]
 + Lepidozona elenensis (G. B. Sowerby I, 1832) [SYNONYM SPECIES 9839:9G57J nidx=null parent=68VYY]
Leptochiton arcticus
 - Leptochiton arcticus (Sars G. O., 1878) [ACCEPTED SPECIES 9837:3TLVT nidx=null]
 + Leptochiton arcticus (G. O. Sars, 1878) [ACCEPTED SPECIES 9839:9G57L nidx=null]
Lepton glabrum
 - Lepton glabrum Fischer P. in de Folin & Périer, 1873 [SYNONYM SPECIES 9837:3TRRP nidx=null parent=3VLQ9]
 + Lepton glabrum P. Fischer, 1873 [SYNONYM SPECIES 9839:9G57S nidx=null parent=3VLQ9]
Leptorussini
 - Leptorussini Morse, 1981 [ACCEPTED TRIBE 9837:KXW nidx=null]
 + Leptorussini Morse, 1981 [ACCEPTED TRIBE 9839:9G6ZF nidx=null]
Leucippa pentagona
 - Leucippa pentagona H. Milne Edwards, 1834 [ACCEPTED SPECIES 9837:6Q3NW nidx=null]
 + Leucippa pentagona H. Milne Edwards, 1833 [ACCEPTED SPECIES 9839:9G57W nidx=null]
Leucosia haematosticta
 - Leucosia haematosticta Adams in Belcher, 1848 [SYNONYM SPECIES 9837:6Q5ZG nidx=null parent=7DRWT]
 + Leucosia haematosticta Adams, 1847 [SYNONYM SPECIES 9839:9G57X nidx=null parent=9G6K5]
Leurocyclus gracilipes
 - Leurocyclus gracilipes (A. Milne-Edwards & Bouvier, 1898) [ACCEPTED SPECIES 9837:727DB nidx=null]
 + Leurocyclus gracilipes (A. Milne-Edwards & Bouvier, 1923) [SYNONYM SPECIES 9839:9G57Z nidx=null parent=6PVDC]
Licina aguadillensis turnerae
 - Licina aguadillensis turnerae (Clench, 1950) [SYNONYM SUBSPECIES 9837:8529J nidx=null parent=878BP]
 + Licina aguadillensis turnerae (Clench, 1951) [SYNONYM SUBSPECIES 9839:9G9N4 nidx=null parent=9G9MD]
Liguus flamellus
 - Liguus flamellus Clench, 1834 [ACCEPTED SPECIES 9837:7RWHP nidx=null]
 + Liguus flamellus Clench, 1934 [ACCEPTED SPECIES 9839:9G983 nidx=null]
Lima (Limatula) confusa
 - Lima (Limatula) confusa Smith E.A., 1885 [SYNONYM SPECIES 9837:84X8C nidx=null parent=6QBB3]
 + Lima (Limatula) confusa E. A. Smith, 1885 [SYNONYM SPECIES 9839:9G585 nidx=null parent=6QBB3]
Limatula (Limatuletta) japonica
 - Limatula (Limatuletta) japonica A. Adams, 1863 [SYNONYM SPECIES 9837:6PYZP nidx=null parent=6QBC4]
 + Limatula (Limatuletta) japonica A. Adams, 1864 [SYNONYM SPECIES 9839:9G587 nidx=null parent=6QBC4]
Limicolaria tulipa
 - Limicolaria tulipa Jousseaume, 1897 [ACCEPTED SPECIES 9837:72B6R nidx=null]
 + Limicolaria tulipa Jousseaume, 1887 [ACCEPTED SPECIES 9839:9G589 nidx=null]
Limnaeus gebleri
 - Limnaeus gebleri Middendorff, 1851 [SYNONYM SPECIES 9837:6QBYG nidx=null parent=4R9FR]
 + Limnaeus gebleri Middendorff, 1850 [SYNONYM SPECIES 9839:9G58C nidx=null parent=4R9FR]
Limnognathida
 - Limnognathida Kristensen & Funch, 2000 [ACCEPTED ORDER 9837:3GG nidx=null]
 + Limnognathida Kristensen & Funch, 2000 [ACCEPTED ORDER 9839:9G25L nidx=null]
Limnoscapha
 - Limnoscapha [ACCEPTED SUBGENUS 9837:62YLP nidx=null]
 + Limnoscapha Lindholm, 1932 [ACCEPTED GENUS 9839:9G3Q3 nidx=null]
Limnoscapha sulcata
 - Limnoscapha sulcata Lindholm, 1932 [SYNONYM SPECIES 9837:87TW4 nidx=null parent=3P5HQ]
 + Limnoscapha sulcata Lindholm, 1932 [ACCEPTED SPECIES 9839:6QCLD nidx=null]
Limotettix (Limotettix) ferganensis
 - Limotettix (Limotettix) ferganensis Dubovsky, 1966 [ACCEPTED SPECIES 9837:6QF9F nidx=null]
 + Limotettix (Limotettix) ferganensis Dubovsky, 1966 [SYNONYM SPECIES 9839:8J7BY nidx=null parent=9G9N5]
Limotettix kozhevnikovi
 - Limotettix kozhevnikovi Zachvatkin, 1938 [SYNONYM SPECIES 9837:8RLPR nidx=null parent=8RKC5]
 + Limotettix kozhevnikovi Zakhvatkin, 1938 [SYNONYM SPECIES 9839:9G83T nidx=null parent=9G7QJ]
Linnavuoriana (Linnavuoriana) intercedens
 - Linnavuoriana (Linnavuoriana) intercedens (Linnavuori, 1949) [ACCEPTED SPECIES 9837:3V3D8 nidx=null]
 + Linnavuoriana (Linnavuoriana) intercedens (Linnavuori, 1950) [ACCEPTED SPECIES 9839:9G66H nidx=null]
Linnavuoriana (Linnavuoriana) malicola
 - Linnavuoriana (Linnavuoriana) malicola (Zachvatkin, 1949) [ACCEPTED SPECIES 9837:3V3D9 nidx=null]
 + Linnavuoriana (Linnavuoriana) malicola (Zakhvatkin, 1949) [ACCEPTED SPECIES 9839:9G66J nidx=null]
Linnavuoriana intercedens
 - Linnavuoriana intercedens (Linnavuori, 1949) [SYNONYM SPECIES 9837:8J7CV nidx=null parent=3V3D8]
 + Linnavuoriana intercedens (Linnavuori, 1950) [SYNONYM SPECIES 9839:9G66G nidx=null parent=9G66H]
Littorina arctica var. elatior
 - Littorina arctica var. elatior Sars M., 1851 [SYNONYM VARIETY 9837:7M7FQ nidx=null parent=3VNQM]
 + Littorina arctica var. elatior M. Sars, 1851 [SYNONYM VARIETY 9839:9G6VK nidx=null parent=3VNQM]
Littorina decollata
 - Littorina decollata F. Krauss in Philippi, 1847 [SYNONYM SPECIES 9837:3VNN9 nidx=null parent=65H92]
 + Littorina decollata Philippi, 1847 [SYNONYM SPECIES 9839:9G58Y nidx=null parent=9G42D]
Littorina floccosa
 - Littorina floccosa Beck in Mörch, 1876 [SYNONYM SPECIES 9837:7RY5C nidx=null parent=6DVBX]
 + Littorina floccosa Mörch, 1876 [SYNONYM SPECIES 9839:9G592 nidx=null parent=6DVBX]
Littorina knysnaensis
 - Littorina knysnaensis F. Krauss in Philippi, 1847 [SYNONYM SPECIES 9837:3VNPG nidx=null parent=65GWR]
 + Littorina knysnaensis Philippi, 1847 [SYNONYM SPECIES 9839:9G593 nidx=null parent=9G42F]
Littorina vadorum
 - Littorina vadorum Sacchi, 1954 [SYNONYM SPECIES 9837:3VNSF nidx=null parent=3VNNH]
 + Littorina vadorum Sacchi, 1984 [SYNONYM SPECIES 9839:9G594 nidx=null parent=3VNNH]
Lora trevyliana
 - Lora trevyliana [SYNONYM SPECIES 9837:7RYB7 nidx=null parent=32KWT]
 + Lora trevyliana [sic] [SYNONYM SPECIES 9839:9G59K nidx=null parent=32KWT]
Loxia grossa
 - Loxia grossa Linnaeus, 1766 [SYNONYM SPECIES 9837:3W8WS nidx=null parent=6XFLD]
 + Loxia grossa Linnaeus, 1767 [SYNONYM SPECIES 9839:9G8FN nidx=null parent=9G7Y6]
Lucina goodhalli
 - Lucina goodhalli Sowerby J., 1837 [SYNONYM SPECIES 9837:8ZF8H nidx=null parent=8YPDK]
 + Lucina goodhalli J. Sowerby, 1837 [SYNONYM SPECIES 9839:9GCM5 nidx=null parent=9GC3D]
Lumpenopsis hypochroma
 - Lumpenopsis hypochroma (Hubbs & Schultz, 1932) [ACCEPTED SPECIES 9837:99JZM nidx=null]
 + Lumpenopsis hypochroma (Hubbs & Schultz, 1932) [ACCEPTED SPECIES 9839:9G59R nidx=null]
Lunulicardia retusa retusa
 - Lunulicardia retusa retusa (Linnaeus, 1767) [ACCEPTED SUBSPECIES 9837:8SY8F nidx=null]
 + Lunulicardia retusa retusa (Linnaeus, 1767) [SYNONYM SUBSPECIES 9839:5JFLH nidx=null parent=6QPLH]
Lunulicardia subretusa
 - Lunulicardia subretusa Sowerby [SYNONYM SPECIES 9837:7RYY7 nidx=null parent=6QPLH]
 + Lunulicardia subretusa (G. B. Sowerby II, 1834) [SYNONYM SPECIES 9839:9G59S nidx=null parent=6QPLH]
Lusitanops expansa
 - Lusitanops expansa (Sars G. O., 1878) [SYNONYM SPECIES 9837:3WFWX nidx=null parent=3WFWW]
 + Lusitanops expansa (G. O. Sars, 1878) [SYNONYM SPECIES 9839:9G59T nidx=null parent=9G59V]
Lusitanops expansus
 - Lusitanops expansus (Sars G. O., 1878) [ACCEPTED SPECIES 9837:3WFWW nidx=null]
 + Lusitanops expansus (G. O. Sars, 1878) [ACCEPTED SPECIES 9839:9G59V nidx=null]
Lusitanops sigmoidea
 - Lusitanops sigmoidea [SYNONYM SPECIES 9837:3WFX4 nidx=null parent=3WFX5]
 + Lusitanops sigmoidea [sic] [SYNONYM SPECIES 9839:9G59W nidx=null parent=3WFX5]
Lymnaea alamosensis
 - Lymnaea alamosensis Arnold, 1908 [ACCEPTED SPECIES 9837:3WRZS nidx=null]
 + Lymnaea alamosensis Arnold, 1907 [ACCEPTED SPECIES 9839:9G59Y nidx=null]
Lyonsiella abyssicola
 - Lyonsiella abyssicola (Sars G. O., 1872) [ACCEPTED SPECIES 9837:3WSWC nidx=null]
 + Lyonsiella abyssicola (G. O. Sars, 1872) [ACCEPTED SPECIES 9839:9G5B7 nidx=null]
Lyria (Harpeola) anna
 - Lyria (Harpeola) anna (Lesson, 1835) [SYNONYM SPECIES 9837:3WTGC nidx=null parent=3WTHK]
 + Lyria (Harpeola) anna (Lesson, 1833) [SYNONYM SPECIES 9839:9G5B8 nidx=null parent=9G5B9]
Lyria anna
 - Lyria anna (Lesson, 1835) [ACCEPTED SPECIES 9837:3WTHK nidx=null]
 + Lyria anna (Lesson, 1833) [ACCEPTED SPECIES 9839:9G5B9 nidx=null]
Lyristes lyricen
 - Lyristes lyricen (DeGeer, 1773) [SYNONYM SPECIES 9837:8JVTY nidx=null parent=8K2K8]
 + Lyristes lyricen (De Geer, 1773) [SYNONYM SPECIES 9839:9G98L nidx=null parent=9G8M6]
Macomona tortuosa
 - Macomona tortuosa (Sowerby, 1867) [SYNONYM SPECIES 9837:3WZYL nidx=null parent=5587S]
 + Macomona tortuosa (G. B. Sowerby II, 1867) [SYNONYM SPECIES 9839:9G5BC nidx=null parent=5587S]
Maia goltziana
 - Maia goltziana d'Oliveira, 1888 [SYNONYM SPECIES 9837:84GYR nidx=null parent=46M2G]
 + Maia goltziana d'Oliveira, 1889 [SYNONYM SPECIES 9839:9G98N nidx=null parent=46M2G]
Malletia obtusa
 - Malletia obtusa (Sars G. O., 1872) [SYNONYM SPECIES 9837:7S264 nidx=null parent=7S265]
 + Malletia obtusa (G. O. Sars, 1872) [SYNONYM SPECIES 9839:9G5BL nidx=null parent=7S265]
Mancosinodia manca
 - Mancosinodia manca (Braun, 1850) [SYNONYM SPECIES 9837:7S27J nidx=null parent=992X6]
 + Mancosinodia manca (A. Braun, 1851) [SYNONYM SPECIES 9839:9G5BN nidx=null parent=9GDC7]
Mangilia galli
 - Mangilia galli (Bivona Ant. in Bivona And., 1838) [SYNONYM SPECIES 9837:7S2C3 nidx=null parent=72SLK]
 + Mangilia galli (Ant. Bivona, 1838) [SYNONYM SPECIES 9839:9G98P nidx=null parent=72SLK]
Maorothiini
 - Maorothiini Assing, 2000 [ACCEPTED TRIBE 9837:8X6NQ nidx=null]
 + Maorothiini Assing, 2000 [ACCEPTED TRIBE 9839:9G6ZG nidx=null]
Marconia translucida
 - Marconia translucida (Dupuis & Putzeys, 1901) [SYNONYM SPECIES 9837:3Y367 nidx=null parent=6KQPD]
 + Marconia translucida (Dupuis & Putzeys, 1902) [SYNONYM SPECIES 9839:9G5BY nidx=null parent=6KQPD]
Margaron (Anodonta) nopalatensis
 - Margaron (Anodonta) nopalatensis (Sowerby, 1867) [SYNONYM SPECIES 9837:3Y4BP nidx=null parent=4QNGF]
 + Margaron (Anodonta) nopalatensis (G. B. Sowerby II, 1867) [SYNONYM SPECIES 9839:9G5C4 nidx=null parent=4QNGF]
Margaron (Unio) swainsoni
 - Margaron (Unio) swainsoni (Sowerby, 1868) [SYNONYM SPECIES 9837:3Y4SQ nidx=null parent=BF8Q]
 + Margaron (Unio) swainsoni (G. B. Sowerby II, 1868) [SYNONYM SPECIES 9839:9G5C5 nidx=null parent=BF8Q]
Marginella impudica var. subturrita
 - Marginella impudica var. subturrita Fischer P., 1884 [SYNONYM VARIETY 9837:7M8T3 nidx=null parent=3Y5VF]
 + Marginella impudica var. subturrita P. Fischer, 1884 [SYNONYM VARIETY 9839:9G6VL nidx=null parent=3Y5VF]
Martesia obtecta
 - Martesia obtecta (Sowerby, 1849) [SYNONYM SPECIES 9837:3Y9WT nidx=null parent=HHBM]
 + Martesia obtecta (G. B. Sowerby II, 1849) [SYNONYM SPECIES 9839:9G5CM nidx=null parent=HHBM]
Mauronapaeus terverii
 - Mauronapaeus terverii (Dupotet in E. A. Forbes, 1838) [ACCEPTED SPECIES 9837:3YG5X nidx=null]
 + Mauronapaeus terverii (Forbes, 1838) [ACCEPTED SPECIES 9839:9G5CT nidx=null]
Megalobulimus bereniceae
 - Megalobulimus bereniceae (Morretes, 1952) [SYNONYM SPECIES 9837:7S3H6 nidx=null parent=7S3J7]
 + Megalobulimus bereniceae (Morretes, 1955) [SYNONYM SPECIES 9839:9G9BL nidx=null parent=7S3J7]
Megalobulimus lopesi
 - Megalobulimus lopesi Leme, 1984 [ACCEPTED SPECIES 9837:7S3JD nidx=null]
 + Megalobulimus lopesi Leme, 1989 [ACCEPTED SPECIES 9839:9G9BM nidx=null]
Megipocerus
 - Megipocerus Zachvatkin, 1945 [ACCEPTED GENUS 9837:8HM56 nidx=null]
 + Megipocerus Zakhvatkin, 1945 [ACCEPTED GENUS 9839:9G3DY nidx=null]
Megipocerus mordvilkoi
 - Megipocerus mordvilkoi Zachvatkin, 1945 [ACCEPTED SPECIES 9837:3Z22Y nidx=null]
 + Megipocerus mordvilkoi Zakhvatkin, 1945 [ACCEPTED SPECIES 9839:9G69N nidx=null]
Meiopriapulomorpha
 - Meiopriapulomorpha Adrianov & Malakhov, 1995 [ACCEPTED ORDER 9837:84JXN nidx=null]
 + Meiopriapulomorpha Adrianov & Malakhov, 1995 [ACCEPTED ORDER 9839:9FZZD nidx=null]
Mejdalania
 - Mejdalania [ACCEPTED GENUS 9837:8RV3Y nidx=null]
 + Mejdalania Gonçalves, 2021 [ACCEPTED GENUS 9839:9G7TB nidx=null]
Melampus graniferus
 - Melampus graniferus [SYNONYM SPECIES 9837:3Z58S nidx=null parent=3Z58R]
 + Melampus graniferus [sic] [SYNONYM SPECIES 9839:9G5CZ nidx=null parent=3Z58R]
Melanella conoidalis
 - Melanella conoidalis (Sowerby, 1865) [ACCEPTED SPECIES 9837:84XG5 nidx=null]
 + Melanella conoidalis (G. B. Sowerby II, 1865) [ACCEPTED SPECIES 9839:9G5D3 nidx=null]
Melania (Acrostoma) hügeli
 - Melania (Acrostoma) hügeli Philippi, 1843 [SYNONYM SPECIES 9837:7S4D4 nidx=null parent=4CRMY]
 + Melania (Acrostoma) hügeli [sic] [SYNONYM SPECIES 9839:9G9BQ nidx=null parent=4CRMY]
Melania mirifica
 - Melania mirifica H. Adams, 1853 [SYNONYM SPECIES 9837:7S4JZ nidx=null parent=56G6Q]
 + Melania mirifica H. Adams, 1854 [SYNONYM SPECIES 9839:9G5D5 nidx=null parent=56G6Q]
Melanoides tuberculata curvicosta
 - Melanoides tuberculata curvicosta (Deshayes in Geoffroy Saint-Hilaire et al., 1832) [SYNONYM SUBSPECIES 9837:5JLCW nidx=null parent=3Z8MG]
 + Melanoides tuberculata curvicosta (Deshayes, 1835) [SYNONYM SUBSPECIES 9839:9G6RC nidx=null parent=3Z8MG]
Meliponocoptidae
 - Meliponocoptidae [ACCEPTED FAMILY 9837:CKK nidx=null]
 + Meliponocoptidae Fain & Rosa, 1983 [ACCEPTED FAMILY 9839:9G7L4 nidx=null]
Melozone biarcuata
 - Melozone biarcuata (Prévost & Des Murs, 1846) [ACCEPTED SPECIES 9837:72Y9M nidx=null]
 + Melozone biarcuata (Prévost & Des Murs, 1842) [ACCEPTED SPECIES 9839:9G69S nidx=null]
Melozone biarcuata biarcuata
 - Melozone biarcuata biarcuata (Prévost & Des Murs, 1846) [ACCEPTED SUBSPECIES 9837:5JMPG nidx=null]
 + Melozone biarcuata biarcuata (Prévost & Des Murs, 1842) [SYNONYM SUBSPECIES 9839:9G7MN nidx=null parent=9G69S]
Melozone biarcuatum
 - Melozone biarcuatum (Prévost & Des Murs, 1846) [SYNONYM SPECIES 9837:72XXM nidx=null parent=72Y9M]
 + Melozone biarcuatum (Prévost & Des Murs, 1842) [SYNONYM SPECIES 9839:9G69T nidx=null parent=9G69S]
Mesagallia
 - Mesagallia Zachvatkin, 1946 [ACCEPTED GENUS 9837:8HM8R nidx=null]
 + Mesagallia Zakhvatkin, 1946 [ACCEPTED GENUS 9839:9G3FD nidx=null]
Mesagallia georgii
 - Mesagallia georgii Zachvatkin, 1946 [ACCEPTED SPECIES 9837:3ZXHX nidx=null]
 + Mesagallia georgii Zakhvatkin, 1946 [ACCEPTED SPECIES 9839:9G69X nidx=null]
Mesogonia brevicornis
 - Mesogonia brevicornis Young Jr., 1977 [ACCEPTED SPECIES 9837:8KHTV nidx=null]
 + Mesogonia brevicornis Young, 1977 [ACCEPTED SPECIES 9839:423LX nidx=null]
Metula hindsii
 - Metula hindsii H. Adams & A. Adams, 1858 [SYNONYM SPECIES 9837:7S597 nidx=null parent=42K7X]
 + Metula hindsii H. Adams & A. Adams, 1853 [SYNONYM SPECIES 9839:9G5F4 nidx=null parent=42K7X]
Micippa curtispina
 - Micippa curtispina Haswell, 1870 [ACCEPTED SPECIES 9837:42MGC nidx=null]
 + Micippa curtispina Haswell, 1880 [ACCEPTED SPECIES 9839:9G5F6 nidx=null]
Micippa inermis
 - Micippa inermis Haswell, 1879 [SYNONYM SPECIES 9837:42MGG nidx=null parent=42MGV]
 + Micippa inermis Haswell, 1880 [SYNONYM SPECIES 9839:9G5F7 nidx=null parent=42MGV]
Micippa superciliosa
 - Micippa superciliosa Haswell, 1879 [SYNONYM SPECIES 9837:73GNB nidx=null parent=42MGP]
 + Micippa superciliosa Haswell, 1880 [SYNONYM SPECIES 9839:9G5F8 nidx=null parent=42MGP]
Microtrochus
 - Microtrochus Kitahara & Cairns, 2021 [ACCEPTED GENUS 9837:8PQ5X nidx=null]
 + Microtrochus [ACCEPTED GENUS 9839:9G7TF nidx=null]
Mimodrylix
 - Mimodrylix Zachvatkin, 1935 [SYNONYM GENUS 9837:8JLLB nidx=null parent=8HGG2]
 + Mimodrylix Zakhvatkin, 1935 [SYNONYM GENUS 9839:9G7TG nidx=null parent=8HGG2]
Mimohardya
 - Mimohardya Zachvatkin, 1946 [ACCEPTED GENUS 9837:8RGPJ nidx=null]
 + Mimohardya Zakhvatkin, 1946 [ACCEPTED GENUS 9839:9G7TH nidx=null]
Mimohardya heptneri
 - Mimohardya heptneri (Zachvatkin, 1946) [ACCEPTED SPECIES 9837:8RLY8 nidx=null]
 + Mimohardya heptneri (Zakhvatkin, 1946) [ACCEPTED SPECIES 9839:9G9BT nidx=null]
Mirabilopsaltria globulata
 - Mirabilopsaltria globulata de Boer, 1996 [ACCEPTED SPECIES 9837:855NB nidx=null]
 + Mirabilopsaltria globulata Boer, 1996 [ACCEPTED SPECIES 9839:43LJW nidx=null]
Mirabilopsaltria inconspicua
 - Mirabilopsaltria inconspicua de Boer, 1996 [ACCEPTED SPECIES 9837:7XBXR nidx=null]
 + Mirabilopsaltria inconspicua Boer, 1996 [ACCEPTED SPECIES 9839:43LK2 nidx=null]
Mirabilopsaltria inflata
 - Mirabilopsaltria inflata de Boer, 1996 [ACCEPTED SPECIES 9837:7XBXT nidx=null]
 + Mirabilopsaltria inflata Boer, 1996 [ACCEPTED SPECIES 9839:43LK7 nidx=null]
Mithraculus coronatus
 - Mithraculus coronatus White, 1847 [SYNONYM SPECIES 9837:73LD8 nidx=null parent=73LD5]
 + Mithraculus coronatus (Herbst, 1785) [SYNONYM SPECIES 9839:9G5FH nidx=null parent=73LD5]
Mitra crassula
 - Mitra crassula Cate, 1963 [SYNONYM SPECIES 9837:7S63H nidx=null parent=52ZPF]
 + Mitra crassula Dall MS [SYNONYM SPECIES 9839:9G5FK nidx=null parent=52ZPF]
Mitra stricta
 - Mitra stricta [SYNONYM SPECIES 9837:43QF3 nidx=null parent=6RL8W]
 + Mitra stricta [sic] [SYNONYM SPECIES 9839:9G5FP nidx=null parent=6RL8W]
Modiola strigata
 - Modiola strigata Hanley, 1843 [SYNONYM SPECIES 9837:7S6BS nidx=null parent=7S8TT]
 + Modiola strigata Hanley, 1843 [SYNONYM SPECIES 9839:43TLG nidx=null parent=44QCH]
Moerchiella deformis
 - Moerchiella deformis (Sowerby, 1833) [ACCEPTED SPECIES 9837:73MZR nidx=null]
 + Moerchiella deformis (G. B. Sowerby I, 1833) [ACCEPTED SPECIES 9839:9G5FT nidx=null]
Monadenia (Shastelix) troglodytes
 - Monadenia (Shastelix) troglodytes [SYNONYM SPECIES 9837:8L3HN nidx=null parent=8L3HQ]
 + Monadenia (Shastelix) troglodytes G. D. Hanna & A. G. Smith, 1933 [SYNONYM SPECIES 9839:9G5FX nidx=null parent=8L3HQ]
Monadenia fidelis beryllica
 - Monadenia fidelis beryllica E. P. Chace & E. M. Chace, 1951 [SYNONYM SUBSPECIES 9837:7TXV3 nidx=null parent=7TXV8]
 + Monadenia fidelis beryllica E. P. Chace & E. M. Chace, 1935 [SYNONYM SUBSPECIES 9839:9G6RL nidx=null parent=7TXV8]
Mongoloiassus
 - Mongoloiassus Zachvatkin, 1953 [SYNONYM GENUS 9837:8RGPS nidx=null parent=8R5L9]
 + Mongoloiassus Zakhvatkin, 1953 [SYNONYM GENUS 9839:9G7TK nidx=null parent=9G3FV]
Mongolojascus
 - Mongolojascus Zachvatkin, 1953 [SYNONYM GENUS 9837:8RGPT nidx=null parent=8R5L9]
 + Mongolojascus Zakhvatkin, 1953 [SYNONYM GENUS 9839:9G7TL nidx=null parent=9G3FV]
Mongolojassus
 - Mongolojassus Zachvatkin, 1953 [ACCEPTED GENUS 9837:8R5L9 nidx=null]
 + Mongolojassus Zakhvatkin, 1953 [ACCEPTED GENUS 9839:9G3FV nidx=null]
Mongolojassus elpatjevskii
 - Mongolojassus elpatjevskii (Zachvatkin, 1953) [ACCEPTED SPECIES 9837:443M6 nidx=null]
 + Mongolojassus elpatjevskii (Zakhvatkin, 1953) [ACCEPTED SPECIES 9839:9G6CW nidx=null]
Monilea masoni
 - Monilea masoni (G. Nevill & H. Nevill, 1874) [SYNONYM SPECIES 9837:8SX6L nidx=null parent=6RNJR]
 + Monilea masoni (G. Nevill & H. Nevill, 1874) [ACCEPTED SPECIES 9839:7S6NS nidx=null]
Monomyces pygmaea
 - Monomyces pygmaea (Risso, 1826) [ACCEPTED SPECIES 9837:448BM nidx=null]
 + Monomyces pygmaea (Risso, 1827) [ACCEPTED SPECIES 9839:9G5G2 nidx=null]
Montacuta donacina
 - Montacuta donacina Wood S., 1851 [ACCEPTED SPECIES 9837:73Q4Q nidx=null]
 + Montacuta donacina S. V. Wood, 1851 [ACCEPTED SPECIES 9839:9G5G3 nidx=null]
Montacuta nivea
 - Montacuta nivea (Sars G.O., 1878) [SYNONYM SPECIES 9837:73PSM nidx=null parent=5572L]
 + Montacuta nivea (G. O. Sars, 1878) [SYNONYM SPECIES 9839:9G5G4 nidx=null parent=5572L]
Moritschus caucasensis
 - Moritschus caucasensis MR Campos, C Magalhães & Rodríguez, 2002 [ACCEPTED SPECIES 9837:44DZL nidx=null]
 + Moritschus caucasensis Campos, Magalhães & Rodríguez, 2003 [ACCEPTED SPECIES 9839:9G5G6 nidx=null]
Murex blainvillii var. gracilis
 - Murex blainvillii var. gracilis Monterosato in Bucquoy, Dautzenberg & Dollfus, 1882 [SYNONYM VARIETY 9837:7M9RD nidx=null parent=44MXN]
 + Murex blainvillii var. gracilis Bucquoy, Dautzenberg & Dollfus, 1882 [SYNONYM VARIETY 9839:9G6VQ nidx=null parent=44MXN]
Murex blainvillii var. violacea
 - Murex blainvillii var. violacea Monterosato in Bucquoy, Dautzenberg & Dollfus, 1882 [SYNONYM VARIETY 9837:5Q7HY nidx=null parent=44MXN]
 + Murex blainvillii var. violacea Bucquoy, Dautzenberg & Dollfus, 1882 [SYNONYM VARIETY 9839:9G6VR nidx=null parent=44MXN]
Murex costellifer
 - Murex costellifer Sowerby J. de C., 1832 [SYNONYM SPECIES 9837:44LY8 nidx=null parent=6558T]
 + Murex costellifer J. de C. Sowerby, 1832 [SYNONYM SPECIES 9839:9G5GC nidx=null parent=6558T]
Murex latus
 - Murex latus Sowerby J., 1813 [SYNONYM SPECIES 9837:8ZFPT nidx=null parent=8YM9G]
 + Murex latus J. Sowerby, 1813 [SYNONYM SPECIES 9839:9GCMH nidx=null parent=9GBXV]
Murex literatus
 - Murex literatus [SYNONYM SPECIES 9837:7S7JH nidx=null parent=SZ96]
 + Murex literatus [sic] [SYNONYM SPECIES 9839:9G5GJ nidx=null parent=SZ96]
Murex obtusus
 - Murex obtusus G. B. Sowerby III, 1894 [SYNONYM SPECIES 9837:742K6 nidx=null parent=3DWHG]
 + Murex obtusus G. B. Sowerby III, 1894 [SYNONYM SPECIES 9839:73QK6 nidx=null parent=3DWJG]
 + Murex obtusus G. B. Sowerby II, 1879 [SYNONYM SPECIES 9839:9G5GB nidx=null parent=3DWJN]
Murex recurvirostrus
 - Murex recurvirostrus [SYNONYM SPECIES 9837:73QM5 nidx=null parent=5BP5T]
 + Murex recurvirostrus [sic] [SYNONYM SPECIES 9839:9G5GM nidx=null parent=5BP5T]
Murex richardi
 - Murex richardi Fischer P., 1882 [SYNONYM SPECIES 9837:73QLS nidx=null parent=5ZZXZ]
 + Murex richardi P. Fischer, 1882 [SYNONYM SPECIES 9839:9G5GN nidx=null parent=5ZZXZ]
Murex smithii
 - Murex smithii Sowerby J. de C., 1827 [SYNONYM SPECIES 9837:8ZFJK nidx=null parent=8YJZF]
 + Murex smithii J. de C. Sowerby, 1827 [SYNONYM SPECIES 9839:9GCMC nidx=null parent=8YJZF]
Muricanthus varius
 - Muricanthus varius (Sowerby, 1834) [SYNONYM SPECIES 9837:8HW2Z nidx=null parent=8HVJZ]
 + Muricanthus varius (G. B. Sowerby II, 1834) [SYNONYM SPECIES 9839:9G5GW nidx=null parent=8HVJZ]
Musculus strigatus
 - Musculus strigatus (Hanley, 1843) [SYNONYM SPECIES 9837:7S8GF nidx=null parent=7S8TT]
 + Musculus strigatus (Hanley, 1843) [ACCEPTED SPECIES 9839:44QCH nidx=null]
Mutilus cymbaeformis
 - Mutilus cymbaeformis [ACCEPTED SPECIES 9837:85VNK nidx=null]
 + Mutilus cymbaeformis (Seguenza, 1883) [SYNONYM SPECIES 9839:9G5H2 nidx=null parent=9G5GZ]
Mya ferruginea
 - Mya ferruginea Gray J.E., 1847 [SYNONYM SPECIES 9837:44RJN nidx=null parent=5572L]
 + Mya ferruginea J. E. Gray, 1847 [SYNONYM SPECIES 9839:9G5H3 nidx=null parent=5572L]
Mytilopsis ungulacaprae
 - Mytilopsis ungulacaprae (Münster, 1838) [SYNONYM SPECIES 9837:8QH84 nidx=null parent=8QGM8]
 + Mytilopsis ungulacaprae (Münster, 1837) [SYNONYM SPECIES 9839:9G9C3 nidx=null parent=8QGM8]
Nanaloricida
 - Nanaloricida Kristensen, 1983 [ACCEPTED ORDER 9837:7NFCL nidx=null]
 + Nanaloricida Kristensen, 1983 [ACCEPTED ORDER 9839:9FZZF nidx=null]
Nanina brookei
 - Nanina brookei (A. Adams & Reeve, 1848) [SYNONYM SPECIES 9837:87WV5 nidx=null parent=87QYP]
 + Nanina brookei (A. Adams & Reeve, 1850) [SYNONYM SPECIES 9839:9G9C5 nidx=null parent=87QYP]
Nannosalarias nativitatis
 - Nannosalarias nativitatis (Regan, 1909) [ACCEPTED SPECIES 9837:45MQF nidx=null]
 + Nannosalarias nativitatis (Regan, 1909) [ACCEPTED SPECIES 9839:9G5HL nidx=null]
Nassa (Arcularia) gibbosula
 - Nassa (Arcularia) gibbosula [SYNONYM SPECIES 9837:8KRW7 nidx=null parent=5942Q]
 + Nassa (Arcularia) gibbosula (Linnaeus, 1758) [SYNONYM SPECIES 9839:9G5HW nidx=null parent=5942Q]
Nassarius (Niotha) desmoulioides
 - Nassarius (Niotha) desmoulioides (Sowerby, 1903) [SYNONYM SPECIES 9837:7S9NZ nidx=null parent=45RNK]
 + Nassarius (Niotha) desmoulioides (G. B. Sowerby III, 1903) [SYNONYM SPECIES 9839:9G5J2 nidx=null parent=45RNK]
Nassarius (Pygmaeonassa) subconstrictus
 - Nassarius (Pygmaeonassa) subconstrictus (Sowerby, 1899) [SYNONYM SPECIES 9837:746JH nidx=null parent=73TYP]
 + Nassarius (Pygmaeonassa) subconstrictus (G. B. Sowerby III, 1899) [SYNONYM SPECIES 9839:9G5J3 nidx=null parent=73TYP]
Natica effusa
 - Natica effusa Swainson, 1840 [SYNONYM SPECIES 9837:45TL5 nidx=null parent=4KXXX]
 + Natica effusa Swainson, 1822 [SYNONYM SPECIES 9839:9G5J6 nidx=null parent=9G5YJ]
Natica subsolida
 - Natica subsolida d'Orbigny, 1847 [ACCEPTED SPECIES 9837:45TVX nidx=null]
 + Natica subsolida A. d'Orbigny, 1852 [SYNONYM SPECIES 9839:9G5J8 nidx=null parent=9GJCX]
Natica undulata
 - Natica undulata [SYNONYM SPECIES 9837:45TX2 nidx=null parent=54P3K]
 + Natica undulata [sic] [SYNONYM SPECIES 9839:9G5JB nidx=null parent=54P3K]
Neaera glacialis
 - Neaera glacialis Sars G. O., 1878 [SYNONYM SPECIES 9837:45XMQ nidx=null parent=32M9T]
 + Neaera glacialis G. O. Sars, 1878 [SYNONYM SPECIES 9839:9G5JD nidx=null parent=9G4JX]
Neaera pectinata
 - Neaera pectinata Carpenter, 1865 [SYNONYM SPECIES 9837:45XNY nidx=null parent=R5KH]
 + Neaera pectinata P. P. Carpenter, 1864 [SYNONYM SPECIES 9839:9G5JF nidx=null parent=9G4BV]
Neanthes trifasciata
 - Neanthes trifasciata (Ehlers, 1901) [ACCEPTED SPECIES 9837:45Y68 nidx=null]
 - Neanthes trifasciata (Ehlers, 1901) [PROVISIONALLY_ACCEPTED SPECIES 9837:89JHV nidx=null]
 + Neanthes trifasciata (Grube, 1878) [ACCEPTED SPECIES 9839:9G4KF nidx=null]
 + Neanthes trifasciata (Grube, 1878) [PROVISIONALLY_ACCEPTED SPECIES 9839:9G4KG nidx=null]
Nebalia strausi
 - Nebalia strausi Risso, 1826 [ACCEPTED SPECIES 9837:45YKB nidx=null]
 + Nebalia strausi Risso, 1827 [ACCEPTED SPECIES 9839:9G5JG nidx=null]
Nectopsychini
 - Nectopsychini Morse, 1981 [ACCEPTED TRIBE 9837:L28 nidx=null]
 + Nectopsychini Morse, 1981 [ACCEPTED TRIBE 9839:9G6ZH nidx=null]
Nehelina
 - Nehelina Zachvatkin, 1946 [ACCEPTED SUBTRIBE 9837:8JKKX nidx=null]
 + Nehelina Zakhvatkin, 1946 [ACCEPTED SUBTRIBE 9839:9G7MF nidx=null]
Neliocarus
 - Neliocarus Thomson, C.G., 1859 [ACCEPTED GENUS 9837:8HMTH nidx=null]
 + Neliocarus Thomson C.G., 1859 [SYNONYM GENUS 9839:9G3GC nidx=null parent=9CLF5]
 + Neliocarus Thomson, C.G., 1859 [ACCEPTED GENUS 9839:9G3GD nidx=null]
Neniauchenia dautzenbergi dautzenbergi
 - Neniauchenia dautzenbergi dautzenbergi (Morlet, 1892) [SYNONYM SUBSPECIES 9837:7TY84 nidx=null parent=7H7JW]
 + Neniauchenia dautzenbergi dautzenbergi (Morlet, 1893) [SYNONYM SUBSPECIES 9839:9G6RN nidx=null parent=9G6QK]
Neoaliturus (Circulifer)
 - Neoaliturus (Circulifer) Zachvatkin, 1935 [ACCEPTED SUBGENUS 9837:8RH3C nidx=null]
 + Neoaliturus (Circulifer) Zakhvatkin, 1935 [ACCEPTED SUBGENUS 9839:8CLV nidx=null]
Neoaliturus (Circulifer) arabicus
 - Neoaliturus (Circulifer) arabicus (Zachvatkin, 1946) [ACCEPTED SPECIES 9837:8RM5L nidx=null]
 + Neoaliturus (Circulifer) arabicus (Zakhvatkin, 1946) [ACCEPTED SPECIES 9839:9G9C7 nidx=null]
Neoaliturus (Circulifer) chinai
 - Neoaliturus (Circulifer) chinai (Zachvatkin, 1946) [ACCEPTED SPECIES 9837:6S6Y8 nidx=null]
 + Neoaliturus (Circulifer) chinai (Zakhvatkin, 1946) [ACCEPTED SPECIES 9839:9G6FV nidx=null]
Neoaliturus (Circulifer) chinai caspius
 - Neoaliturus (Circulifer) chinai caspius (Zachvatkin, 1946) [ACCEPTED SUBSPECIES 9837:7HJSL nidx=null]
 + Neoaliturus (Circulifer) chinai caspius (Zakhvatkin, 1946) [ACCEPTED SUBSPECIES 9839:9G7NC nidx=null]
Neoaliturus (Circulifer) chinai chinai
 - Neoaliturus (Circulifer) chinai chinai (Zachvatkin, 1946) [ACCEPTED SUBSPECIES 9837:8RPCR nidx=null]
 + Neoaliturus (Circulifer) chinai chinai (Zakhvatkin, 1946) [ACCEPTED SUBSPECIES 9839:9G9NF nidx=null]
Neoaliturus (Circulifer) jenjouriste
 - Neoaliturus (Circulifer) jenjouriste (Zachvatkin, 1946) [ACCEPTED SPECIES 9837:8RM5M nidx=null]
 + Neoaliturus (Circulifer) jenjouriste (Zakhvatkin, 1946) [ACCEPTED SPECIES 9839:9G9C8 nidx=null]
Neodartus vinulus
 - Neodartus vinulus (Stål, 1855) [ACCEPTED SPECIES 9837:99R3M nidx=null]
 + Neodartus vinulus (Stål, 1855) [ACCEPTED SPECIES 9839:9G6FY nidx=null]
Neotibicen lyricen
 - Neotibicen lyricen (DeGeer, 1773) [ACCEPTED SPECIES 9837:46V9Z nidx=null]
 + Neotibicen lyricen (De Geer, 1773) [ACCEPTED SPECIES 9839:9G85N nidx=null]
Neotibicen lyricen lyricen
 - Neotibicen lyricen lyricen (DeGeer, 1773) [ACCEPTED SUBSPECIES 9837:8K2K8 nidx=null]
 + Neotibicen lyricen lyricen (De Geer, 1773) [ACCEPTED SUBSPECIES 9839:9G8M6 nidx=null]
Neptunia jeffreysiana
 - Neptunia jeffreysiana (Fischer P., 1868) [SYNONYM SPECIES 9837:4745X nidx=null parent=XD3M]
 + Neptunia jeffreysiana (P. Fischer, 1868) [SYNONYM SPECIES 9839:9G5K5 nidx=null parent=XD3M]
Neritina (Vittoida) coromandeliana
 - Neritina (Vittoida) coromandeliana G. B. Sowerby I, 1832 [SYNONYM SPECIES 9837:7SBRK nidx=null parent=7FT8W]
 + Neritina (Vittoida) coromandeliana G. B. Sowerby I, 1836 [SYNONYM SPECIES 9839:9G5K7 nidx=null parent=7FT8W]
Neritina belladonna
 - Neritina belladonna Mousson, 1874 [SYNONYM SPECIES 9837:8H9QY nidx=null parent=56C4B]
 + Neritina belladonna Mousson, 1854 [SYNONYM SPECIES 9839:9G9CB nidx=null parent=56C4B]
Neritina subpunctata
 - Neritina subpunctata (Récluz, 1843) [SYNONYM SPECIES 9837:7SBW9 nidx=null parent=W87R]
 + Neritina subpunctata (Récluz, 1844) [SYNONYM SPECIES 9839:9G6GL nidx=null parent=W87R]
Nesotetix
 - Nesotetix Matsumura, 1931 [SYNONYM GENUS 9837:8JLNJ nidx=null parent=8HCF6]
 + Nesotetix Matsumura, 1932 [SYNONYM GENUS 9839:9G7V2 nidx=null parent=8HCF6]
Nicania banksii var. globosa
 - Nicania banksii var. globosa Sars G.O., 1878 [SYNONYM VARIETY 9837:7LYZY nidx=null parent=HN58]
 + Nicania banksii var. globosa G. O. Sars, 1878 [SYNONYM VARIETY 9839:9G6VY nidx=null parent=HN58]
Nioniini
 - Nioniini Oman, 1943 [ACCEPTED TRIBE 9837:8JKCP nidx=null]
 - Nioniini Oman, 1943 [SYNONYM TRIBE 9837:8JKCQ nidx=null parent=8JKCP]
 + Nioniini Oman, 1943 [SYNONYM SUBFAMILY 9839:9G7LQ nidx=null parent=8JK54]
Nioninae
 - Nioninae Oman, 1943 [SYNONYM TRIBE 9837:8RGB4 nidx=null parent=8JKCP]
 + Nioninae Oman, 1943 [SYNONYM SUBFAMILY 9839:9G7LR nidx=null parent=8JK54]
Nodilittorina africana
 - Nodilittorina africana (F. Krauss in Philippi, 1847) [SYNONYM SPECIES 9837:7SCCB nidx=null parent=65H92]
 + Nodilittorina africana (Philippi, 1847) [SYNONYM SPECIES 9839:9G5KL nidx=null parent=9G42D]
Nodilittorina knysnaensis
 - Nodilittorina knysnaensis (F. Krauss in Philippi, 1847) [SYNONYM SPECIES 9837:7SCCK nidx=null parent=65GWR]
 + Nodilittorina knysnaensis (Philippi, 1847) [SYNONYM SPECIES 9839:9G5KM nidx=null parent=9G42F]
Nodilittorina natalensis
 - Nodilittorina natalensis (F. Krauss in Philippi, 1847) [SYNONYM SPECIES 9837:47L79 nidx=null parent=6DVBF]
 + Nodilittorina natalensis (Philippi, 1847) [SYNONYM SPECIES 9839:9G5KN nidx=null parent=6DVBF]
Nododelphinula buckmani
 - Nododelphinula buckmani (Morris & Lycett, 1850) [ACCEPTED SPECIES 9837:6RYVX nidx=null]
 + Nododelphinula buckmani (J. Morris & Lycett, 1851) [ACCEPTED SPECIES 9839:9G5KP nidx=null]
Nolanomelissini
 - Nolanomelissini Rozen, 2003 [ACCEPTED TRIBE 9837:L2H nidx=null]
 + Nolanomelissini Rozen, 2003 [ACCEPTED TRIBE 9839:9G6ZJ nidx=null]
Norvellina bicolorata
 - Norvellina bicolorata (Ball, 1905) [ACCEPTED SPECIES 9837:47QVF nidx=null]
 + Norvellina bicolorata (Ball, 1905) [ACCEPTED SPECIES 9839:9G6J3 nidx=null]
Notoplax (Amblyplax) brookesi
 - Notoplax (Amblyplax) brookesi Ashby, 1929 [SYNONYM SPECIES 9837:8TNZW nidx=null parent=47XV6]
 + Notoplax (Amblyplax) brookesi Ashby, 1929 [SYNONYM SPECIES 9839:6SBGS nidx=null parent=47XVX]
Nubithia gayi
 - Nubithia gayi (Spinola, 1852) [ACCEPTED SPECIES 9837:85639 nidx=null]
 + Nubithia gayi Spinola, 1852 [SYNONYM SPECIES 9839:9G9CD nidx=null parent=9G9CF]
 + Nubithia gayi (Spinola, 1852) [ACCEPTED SPECIES 9839:9G9CF nidx=null]
Nucula sulcata
 - Nucula sulcata ronn, 1831, sensu Nicklès, 1955 [AMBIGUOUS_SYNONYM SPECIES 9837:7SCRL nidx=null parent=482ZC]
 + Nucula sulcata Bronn, 1831 [SYNONYM SPECIES 9839:9G5KX nidx=null parent=482ZC]
Ochrotrichiini
 - Ochrotrichiini Marshall, 1979 [ACCEPTED TRIBE 9837:L35 nidx=null]
 + Ochrotrichiini Marshall, 1979 [ACCEPTED TRIBE 9839:9G6ZK nidx=null]
Ochthexenus clavicornis
 - Ochthexenus clavicornis Motschulsky, 1860 [SYNONYM SPECIES 9837:48G3B nidx=null parent=499Z4]
 + Ochthexenus clavicornis Hochhuth, 1860 [SYNONYM SPECIES 9839:9G8J2 nidx=null parent=499Z4]
Octopoteuthis neilseni
 - Octopoteuthis neilseni [sic] [SYNONYM SPECIES 9837:48KJ5 nidx=null parent=48KJ6]
 + Octopoteuthis neilseni G. C. Robson, 1948 [SYNONYM SPECIES 9839:9G5LM nidx=null parent=48KJ6]
Odostomia magnifica
 - Odostomia magnifica (Seguenza G., 1880) [SYNONYM SPECIES 9837:48SYM nidx=null parent=59NXW]
 + Odostomia magnifica (G. Seguenza, 1880) [SYNONYM SPECIES 9839:9G5LQ nidx=null parent=9G6JJ]
Odostomia unidentata var. turgida
 - Odostomia unidentata var. turgida Sars G. O., 1878 [SYNONYM VARIETY 9837:5QBT7 nidx=null parent=48T99]
 + Odostomia unidentata var. turgida G. O. Sars, 1878 [SYNONYM VARIETY 9839:9G6W2 nidx=null parent=48T99]
Oenopota angulosa
 - Oenopota angulosa (Sars G. O., 1878) [SYNONYM SPECIES 9837:48XJ6 nidx=null parent=6VY3H]
 + Oenopota angulosa (G. O. Sars, 1878) [SYNONYM SPECIES 9839:9G5LS nidx=null parent=9G5ZF]
Oenopota assimilis
 - Oenopota assimilis (Sars G. O., 1878) [SYNONYM SPECIES 9837:48XJ8 nidx=null parent=4MTND]
 + Oenopota assimilis (G. O. Sars, 1878) [SYNONYM SPECIES 9839:9G5LT nidx=null parent=9G5ZG]
Oenopota conoidea
 - Oenopota conoidea (Sars G. O., 1878) [SYNONYM SPECIES 9837:48XJN nidx=null parent=32KW5]
 + Oenopota conoidea (G. O. Sars, 1878) [SYNONYM SPECIES 9839:9G5LV nidx=null parent=9G4JS]
Oenopota harpularia
 - Oenopota harpularia Grieg, 1931 [AMBIGUOUS_SYNONYM SPECIES 9837:48XKC nidx=null parent=D5Z9]
 + Oenopota harpularia Couthouy, 1838 [SYNONYM SPECIES 9839:9G5LW nidx=null parent=D5Z9]
Oenopota obliqua
 - Oenopota obliqua (Sars G. O., 1878) [ACCEPTED SPECIES 9837:48XL2 nidx=null]
 + Oenopota obliqua (G. O. Sars, 1878) [ACCEPTED SPECIES 9839:9G5LX nidx=null]
Oenopota scalaroides
 - Oenopota scalaroides (Sars G. O., 1878) [SYNONYM SPECIES 9837:48XLQ nidx=null parent=4MTPX]
 + Oenopota scalaroides (G. O. Sars, 1878) [SYNONYM SPECIES 9839:9G5LY nidx=null parent=9G5ZH]
Oenopota tenuicostata
 - Oenopota tenuicostata (Sars G. O., 1878) [ACCEPTED SPECIES 9837:48XM3 nidx=null]
 + Oenopota tenuicostata (G. O. Sars, 1878) [ACCEPTED SPECIES 9839:9G5LZ nidx=null]
Okenia amoenula
 - Okenia amoenula (Bergh, 1908) [ACCEPTED SPECIES 9837:492BJ nidx=null]
 + Okenia amoenula (Bergh, 1907) [ACCEPTED SPECIES 9839:9G5M2 nidx=null]
Oliva branderi
 - Oliva branderi Sowerby J., 1821 [SYNONYM SPECIES 9837:8ZFC2 nidx=null parent=8YNSJ]
 + Oliva branderi J. Sowerby, 1821 [SYNONYM SPECIES 9839:9GCM6 nidx=null parent=9GC2Q]
Omalaxis
 - Omalaxis Deshayes, 1830 [ACCEPTED GENUS 9837:7PB7H nidx=null]
 + Omalaxis Deshayes, 1832 [ACCEPTED GENUS 9839:9G3V5 nidx=null]
Omalogyra
 - Omalogyra Jeffreys, 1860 [ACCEPTED GENUS 9837:8V5TH nidx=null]
 + Omalogyra Jeffreys, 1859 [ACCEPTED GENUS 9839:9G3H7 nidx=null]
Omalogyra simplex
 - Omalogyra simplex (Costa O. G., 1861) [ACCEPTED SPECIES 9837:8V8VT nidx=null]
 + Omalogyra simplex (O. G. Costa, 1861) [ACCEPTED SPECIES 9839:9G5MD nidx=null]
Omphalorissa purchasi
 - Omphalorissa purchasi (Pfeiffer, 1862) [SYNONYM SPECIES 9837:49F4W nidx=null parent=6KBGH]
 + Omphalorissa purchasi (L. Pfeiffer, 1861) [SYNONYM SPECIES 9839:9G5MG nidx=null parent=6KBGH]
Onchidella remanei
 - Onchidella remanei Marcus Ev., 1956 [SYNONYM SPECIES 9837:49FQR nidx=null parent=7SHZR]
 + Onchidella remanei Ev. Marcus, 1956 [SYNONYM SPECIES 9839:9G5MH nidx=null parent=7SHZR]
Onchidoris fusca
 - Onchidoris fusca (Müller O. F., 1776) [SYNONYM SPECIES 9837:49FSR nidx=null parent=49FSG]
 + Onchidoris fusca (O. F. Müller, 1776) [SYNONYM SPECIES 9839:9G5MK nidx=null parent=49FSG]
Onchodia valeriae
 - Onchodia valeriae (Giusti Fr., 1987) [ACCEPTED SPECIES 9837:49FVS nidx=null]
 + Onchodia valeriae (Fr. Giusti, 1987) [ACCEPTED SPECIES 9839:9G5MM nidx=null]
Onchoproteocephalidea
 - Onchoproteocephalidea Caira, Jensen, Waeschenbach, Olson & Littlewood, 2014 [ACCEPTED ORDER 9837:7NFD8 nidx=null]
 + Onchoproteocephalidea Caira, Jensen, Waeschenbach, Olson & Littlewood, 2014 [ACCEPTED ORDER 9839:9FZZG nidx=null]
Onithochiton lyelli
 - Onithochiton lyelli Sowerby, 1832 [SYNONYM SPECIES 9837:49K9N nidx=null parent=49K9P]
 + Onithochiton lyelli (G. B. Sowerby I, 1832) [SYNONYM SPECIES 9839:9G5MN nidx=null parent=49K9P]
Onukiana
 - Onukiana [ACCEPTED GENUS 9837:8RSLW nidx=null]
 + Onukiana Yang & Zhang, 2004 [ACCEPTED GENUS 9839:9G7VV nidx=null]
Orthalicoidea
 - Orthalicoidea Martens, 1860 [ACCEPTED SUPERFAMILY 9837:7NGTL nidx=null]
 + Orthalicoidea E. von Martens, 1860 [ACCEPTED SUPERFAMILY 9839:5FP nidx=null]
Orthogibbus (Orthogibbus) duponti
 - Orthogibbus (Orthogibbus) duponti [SYNONYM SPECIES 9837:8M4R4 nidx=null parent=3GZMW]
 + Orthogibbus (Orthogibbus) duponti [sic] [SYNONYM SPECIES 9839:9G9CQ nidx=null parent=3GZMW]
Oxypoda praecox
 - Oxypoda praecox Hochhuth, 1862 [AMBIGUOUS_SYNONYM SPECIES 9837:8XTYR nidx=null parent=8YDXH]
 + Oxypoda praecox Hochhuth, 1863 [AMBIGUOUS_SYNONYM SPECIES 9839:9G86G nidx=null parent=8YDXH]
Pachydon cuneatus
 - Pachydon cuneatus (Conrad, 1871) [ACCEPTED SPECIES 9837:868J3 nidx=null]
 + Pachydon cuneatus (H. Woodward, 1871) [ACCEPTED SPECIES 9839:9G9CY nidx=null]
Pachydontinae
 - Pachydontinae H. A. Vokes, 1945 [ACCEPTED SUBFAMILY 9837:8K44W nidx=null]
 + Pachydontinae H. E. Vokes, 1945 [ACCEPTED SUBFAMILY 9839:9G7LB nidx=null]
Padollus orbigny
 - Padollus orbigny Costa O.G., 1838 [SYNONYM SPECIES 9837:4BWHD nidx=null parent=4VN7P]
 + Padollus orbigny O. G. Costa, 1838 [SYNONYM SPECIES 9839:9G5PC nidx=null parent=4VN7P]
Pagiphora annulata
 - Pagiphora annulata (Brullé, 1832) [ACCEPTED SPECIES 9837:8Z457 nidx=null]
 + Pagiphora annulata (Brullé, 1832) [ACCEPTED SPECIES 9839:9G86J nidx=null]
Palaina (Cylindropalaina) occidentalis
 - Palaina (Cylindropalaina) occidentalis (Guppy, 1872) [SYNONYM SPECIES 9837:8H9CH nidx=null parent=8HPPC]
 + Palaina (Cylindropalaina) occidentalis (Godwin-Austen, 1886) [SYNONYM SPECIES 9839:9G9D2 nidx=null parent=8HPPC]
Palaina occidentalis
 - Palaina occidentalis (Guppy, 1872) [SYNONYM SPECIES 9837:7SL9B nidx=null parent=8HPPC]
 + Palaina occidentalis Godwin-Austen, 1886 [SYNONYM SPECIES 9839:9G9D3 nidx=null parent=8HPPC]
Paleoastroides
 - Paleoastroides Chevalier, 1962 [ACCEPTED GENUS 9837:85KZ6 nidx=null]
 + Paleoastroides Chevalier, 1961 [ACCEPTED GENUS 9839:9G7W5 nidx=null]
Paleoastroides michelini
 - Paleoastroides michelini Chevalier, 1962 [ACCEPTED SPECIES 9837:8KD7B nidx=null]
 + Paleoastroides michelini Chevalier, 1961 [ACCEPTED SPECIES 9839:9G9D5 nidx=null]
Palliolum prestwichi
 - Palliolum prestwichi (Morris in Prestwich, 1852) [ACCEPTED SPECIES 9837:8YNH7 nidx=null]
 + Palliolum prestwichi [sic] [SYNONYM SPECIES 9839:9GC27 nidx=null parent=9GJY9]
Paludinella andrewsiana
 - Paludinella andrewsiana (E. A. Smith, 1990) [SYNONYM SPECIES 9837:7SLJH nidx=null parent=672LY]
 + Paludinella andrewsiana (E. A. Smith, 1900) [SYNONYM SPECIES 9839:9G9D6 nidx=null parent=672LY]
Pangasius larnaudii
 - Pangasius larnaudii Bocourt, 1866 [ACCEPTED SPECIES 9837:99MK5 nidx=null]
 + Pangasius larnaudii Bocourt, 1866 [ACCEPTED SPECIES 9839:9G5PP nidx=null]
Panopea norvegica var. nana
 - Panopea norvegica var. nana Sowerby J. de C., 1840 [SYNONYM VARIETY 9837:5QGQJ nidx=null parent=4CG42]
 + Panopea norvegica var. nana J. de C. Sowerby, 1840 [SYNONYM VARIETY 9839:9G6W4 nidx=null parent=4CG42]
Pantodon buchholzi
 - Pantodon buchholzi Peters, 1876 [ACCEPTED SPECIES 9837:9CZ6M nidx=null]
 + Pantodon buchholzi Peters, 1876 [ACCEPTED SPECIES 9839:9G5PR nidx=null]
Parachela
 - Parachela Schuster, Nelson, Grigarick & Christenberry, 1980 [ACCEPTED ORDER 9837:623DR nidx=null]
 + Parachela Schuster, Nelson, Grigarick & Christenberry, 1980 [ACCEPTED ORDER 9839:9G25M nidx=null]
Paradicodia
 - Paradicodia [ACCEPTED GENUS 9837:8KD82 nidx=null]
 + Paradicodia Nielson & Weideman, 2017 [ACCEPTED GENUS 9839:9G7W6 nidx=null]
Paradorydium (Semenovium) aristidae
 - Paradorydium (Semenovium) aristidae (Zachvatkin, 1953) [ACCEPTED SPECIES 9837:8JXGS nidx=null]
 + Paradorydium (Semenovium) aristidae (Zakhvatkin, 1953) [ACCEPTED SPECIES 9839:9G9DH nidx=null]
Paradorydium aristidae
 - Paradorydium aristidae (Zachvatkin, 1953) [SYNONYM SPECIES 9837:8JXGW nidx=null parent=8JXGS]
 + Paradorydium aristidae (Zakhvatkin, 1953) [SYNONYM SPECIES 9839:9G9DJ nidx=null parent=9G9DH]
Paradorydium stipae
 - Paradorydium stipae Zachvatkin, 1953 [ACCEPTED SPECIES 9837:4CTV4 nidx=null]
 + Paradorydium stipae Zakhvatkin, 1953 [ACCEPTED SPECIES 9839:9G6NK nidx=null]
Paralimnus angusticeps
 - Paralimnus angusticeps Zachvatkin, 1953 [SYNONYM SPECIES 9837:8RQLP nidx=null parent=4CZ63]
 + Paralimnus angusticeps Zakhvatkin, 1953 [SYNONYM SPECIES 9839:9G6NR nidx=null parent=4CZ63]
Parallaxis colorata
 - Parallaxis colorata Linnavuori, 1954 [ACCEPTED SPECIES 9837:4CZJ6 nidx=null]
 + Parallaxis colorata Linnavuori, 1955 [ACCEPTED SPECIES 9839:9G6P3 nidx=null]
Parallaxis imitans
 - Parallaxis imitans Linnavuori, 1954 [ACCEPTED SPECIES 9837:4CZJD nidx=null]
 + Parallaxis imitans Linnavuori, 1955 [ACCEPTED SPECIES 9839:9G6P4 nidx=null]
Parallaxis praenubila
 - Parallaxis praenubila Linnavuori, 1954 [ACCEPTED SPECIES 9837:4CZJM nidx=null]
 + Parallaxis praenubila Linnavuori, 1955 [ACCEPTED SPECIES 9839:9G6P5 nidx=null]
Paramesonchium angelae
 - Paramesonchium angelae (Inglis, 1967) [SYNONYM SPECIES 9837:8K43L nidx=null parent=92Y9H]
 + Paramesonchium angelae (Inglis, 1968) [SYNONYM SPECIES 9839:9G5Q4 nidx=null parent=92Y9H]
Paramuricea clavata
 - Paramuricea clavata (Risso, 1826) [ACCEPTED SPECIES 9837:4D452 nidx=null]
 + Paramuricea clavata (Risso, 1827) [ACCEPTED SPECIES 9839:9G5Q6 nidx=null]
Parapinnixa nitida
 - Parapinnixa nitida (Lockington, 1876) [ACCEPTED SPECIES 9837:4D8SH nidx=null]
 + Parapinnixa nitida (Lockington, 1877) [ACCEPTED SPECIES 9839:9G5Q8 nidx=null]
Parhyposomata
 - Parhyposomata Balogh & Mahunka, 1979 [ACCEPTED INFRAORDER 9837:4MS nidx=null]
 + Parhyposomata Balogh & Mahunka, 1979 [ACCEPTED INFRAORDER 9839:9G6YB nidx=null]
Parvamussium duodecimlamellatum
 - Parvamussium duodecimlamellatum (Bronn, 1832) [ACCEPTED SPECIES 9837:6TT6H nidx=null]
 + Parvamussium duodecimlamellatum (Bronn, 1831) [ACCEPTED SPECIES 9839:9G5QB nidx=null]
Paryphostomum huaccaci
 - Paryphostomum huaccaci Ibanez H, 1974 [ACCEPTED SPECIES 9837:8RW42 nidx=null]
 + Paryphostomum huaccaci Ibanez H, 1974 [ACCEPTED SPECIES 9839:9G9DQ nidx=null]
Patella (Ancistromesus) fischeri
 - Patella (Ancistromesus) fischeri Christiaens, 1973 [SYNONYM SPECIES 9837:4DZN2 nidx=null parent=3K45N]
 + Patella (Ancistromesus) fischeri Christiaens, 1974 [SYNONYM SPECIES 9839:9G5QC nidx=null parent=3K45N]
Patella ulyssiponensis deserta
 - Patella ulyssiponensis deserta Christiaens, 1973 [SYNONYM SUBSPECIES 9837:7KHPX nidx=null parent=75SHQ]
 + Patella ulyssiponensis deserta Christiaens, 1974 [SYNONYM SUBSPECIES 9839:9G6S5 nidx=null parent=75SHQ]
Patelloida saccharinoides
 - Patelloida saccharinoides Habe & Kosuge, 1996 [ACCEPTED SPECIES 9837:75TZV nidx=null]
 + Patelloida saccharinoides Habe & Kosuge, 1966 [ACCEPTED SPECIES 9839:9G5QK nidx=null]
Pecchiolia abyssicola
 - Pecchiolia abyssicola Sars G. O., 1872 [SYNONYM SPECIES 9837:767SK nidx=null parent=3WSWC]
 + Pecchiolia abyssicola G. O. Sars, 1872 [SYNONYM SPECIES 9839:9G5QQ nidx=null parent=9G5B7]
Pecten altiplicatus
 - Pecten altiplicatus Conrad, 1857 [SYNONYM SPECIES 9837:6TW72 nidx=null parent=69WSC]
 + Pecten altiplicatus [sic] [SYNONYM SPECIES 9839:9G5QS nidx=null parent=69WSC]
Pecten duodecimlamellatus
 - Pecten duodecimlamellatus Bronn, 1832 [SYNONYM SPECIES 9837:6TVH5 nidx=null parent=6TT6H]
 + Pecten duodecimlamellatus Bronn, 1831 [SYNONYM SPECIES 9839:9G5R2 nidx=null parent=9G5QB]
Pecten jamesoni
 - Pecten jamesoni Smith J., 1839 [SYNONYM SPECIES 9837:767G4 nidx=null parent=4NK3R]
 + Pecten jamesoni J. Smith, 1839 [SYNONYM SPECIES 9839:9G5R5 nidx=null parent=4NK3R]
Pecten laurenti
 - Pecten laurenti (Gmelin, 1791) [SYNONYM SPECIES 9837:767G7 nidx=null parent=6HJYH]
 + Pecten laurenti [sic] [SYNONYM SPECIES 9839:9G5R6 nidx=null parent=6HJYH]
Pedicellaster sexradiatus
 - Pedicellaster sexradiatus Perrier in Milne-Edwards, 1882 [SYNONYM SPECIES 9837:75WTJ nidx=null parent=3N4LR]
 + Pedicellaster sexradiatus Perrier in Milne-Edwards, 1882 [SYNONYM SPECIES 9839:9G5RK nidx=null parent=3N4LR]
Pelodrilus africanus
 - Pelodrilus africanus Michaelsen, 1905 [SYNONYM SPECIES 9837:8568Y nidx=null parent=869WR]
 + Pelodrilus africanus Michaelsen, 1905 [ACCEPTED SPECIES 9839:76CTG nidx=null]
Penestragania (Abdistragania) noxina
 - Penestragania (Abdistragania) noxina Blocker, 1979 [SYNONYM SPECIES 9837:8JBT3 nidx=null parent=8JN52]
 + Penestragania (Abdistragania) noxina Blocker, 1979 [ACCEPTED SPECIES 9839:76H5V nidx=null]
Penion petitianus
 - Penion petitianus (d'Orbigny, 1842) [ACCEPTED SPECIES 9837:76KFN nidx=null]
 + Penion petitianus (A. d'Orbigny, 1843) [ACCEPTED SPECIES 9839:9G5RT nidx=null]
Penthimia maculipennis
 - Penthimia maculipennis Spinola, 1852 [ACCEPTED SPECIES 9837:6V26S nidx=null]
 + Penthimia maculipennis Blanchard, 1852 [ACCEPTED SPECIES 9839:9G6R2 nidx=null]
Petelodoris triphylla
 - Petelodoris triphylla Bergh, 1881 [SYNONYM SPECIES 9837:4FD7J nidx=null parent=J7W3]
 + Petelodoris triphylla Bergh, 1882 [SYNONYM SPECIES 9839:9G5SD nidx=null parent=J7W3]
Pettancylus farquhari
 - Pettancylus farquhari (B. Walker, 1912) [ACCEPTED SPECIES 9837:6V7TM nidx=null]
 + Pettancylus farquhari (B. Walker, 1924) [ACCEPTED SPECIES 9839:9G5SH nidx=null]
Phalium (Semicassis) vector
 - Phalium (Semicassis) vector R. T. Abbott, 1993 [SYNONYM SPECIES 9837:9F4Z8 nidx=null parent=4WG7M]
 + Phalium (Semicassis) vector R. T. Abbott, 1993 [SYNONYM SPECIES 9839:9G9DT nidx=null parent=4WG7M]
Phasianella umbilicata
 - Phasianella umbilicata d'Orbigny, 1840 [SYNONYM SPECIES 9837:99478 nidx=null parent=3CBPL]
 + Phasianella umbilicata d'Orbigny, 1842 [SYNONYM SPECIES 9839:9GDCW nidx=null parent=9G4RZ]
Philinoglossa remanei
 - Philinoglossa remanei Marcus Ev. & Er., 1958 [ACCEPTED SPECIES 9837:779ZC nidx=null]
 + Philinoglossa remanei Ev. Marcus & Er. Marcus, 1958 [ACCEPTED SPECIES 9839:9G5SN nidx=null]
Phlepsius (Phlepsius) asiaticus
 - Phlepsius (Phlepsius) asiaticus Zachvatkin, 1945 [SYNONYM SPECIES 9837:8KN3R nidx=null parent=8JY57]
 + Phlepsius (Phlepsius) asiaticus Zakhvatkin, 1945 [SYNONYM SPECIES 9839:9G8JT nidx=null parent=9G8JV]
Phlepsius asiaticus
 - Phlepsius asiaticus Zachvatkin, 1945 [ACCEPTED SPECIES 9837:8JY57 nidx=null]
 + Phlepsius asiaticus Zakhvatkin, 1945 [ACCEPTED SPECIES 9839:9G8JV nidx=null]
Phlepsius asiaticus angorensis
 - Phlepsius asiaticus angorensis Zachvatkin, 1945 [SYNONYM SUBSPECIES 9837:8KKKM nidx=null parent=8JY57]
 + Phlepsius asiaticus angorensis Zakhvatkin, 1945 [SYNONYM SUBSPECIES 9839:9G9NZ nidx=null parent=9G8JV]
Phlepsius rodendorfi
 - Phlepsius rodendorfi Zachvatkin, 1924 [SYNONYM SPECIES 9837:8RRM6 nidx=null parent=6GG4V]
 + Phlepsius rodendorfi (Zakhvatkin, 1924) [SYNONYM SPECIES 9839:9G9DX nidx=null parent=9G57V]
Phlyxia erosa
 - Phlyxia erosa A. Milne-Edwards, 1874 [SYNONYM SPECIES 9837:4GJTH nidx=null parent=38C85]
 + Phlyxia erosa A. Milne-Edwards, 1873 [SYNONYM SPECIES 9839:9G5SV nidx=null parent=9G4Q4]
Phylactophallus
 - Phylactophallus Pocock, 1909 [ACCEPTED GENUS 9837:7PRP7 nidx=null]
 + Phylactophallus Pocock, 1910 [ACCEPTED GENUS 9839:9G3JK nidx=null]
Phyllidia pulitzeri
 - Phyllidia pulitzeri Pruvot-Fol, 1962 [SYNONYM SPECIES 9837:4H4YB nidx=null parent=4H4XG]
 + Phyllidia pulitzeri Pruvot-Fol, 1963 [SYNONYM SPECIES 9839:9G5T5 nidx=null parent=4H4XG]
Phylliroe bucephalum
 - Phylliroe bucephalum Lamarck, 1816 [SYNONYM SPECIES 9837:4H52Z nidx=null parent=7SPNK]
 + Phylliroe bucephalum [sic] [SYNONYM SPECIES 9839:9G5T7 nidx=null parent=7SPNK]
Phylliroe lichtensteini
 - Phylliroe lichtensteini Eschscholtz, 1825 [SYNONYM SPECIES 9837:4H534 nidx=null parent=4H535]
 + Phylliroe lichtensteini [sic] [SYNONYM SPECIES 9839:9G5T8 nidx=null parent=4H535]
Physa natalensis
 - Physa natalensis F. Krauss, 1841 [SYNONYM SPECIES 9837:4HF4T nidx=null parent=NTP9]
 + Physa natalensis Küster, 1841 [SYNONYM SPECIES 9839:9G5T9 nidx=null parent=9G49K]
Pilidiophora
 - Pilidiophora Thollesson & Norenburg, 2003 [ACCEPTED CLASS 9837:84JV2 nidx=null]
 + Pilidiophora Thollesson & Norenburg, 2003 [ACCEPTED CLASS 9839:9FZZB nidx=null]
Piliscus radiatus
 - Piliscus radiatus (Sars M., 1851) [SYNONYM SPECIES 9837:4HTS3 nidx=null parent=4HTRY]
 + Piliscus radiatus (M. Sars, 1851) [SYNONYM SPECIES 9839:9G5TB nidx=null parent=4HTRY]
Pinndorama
 - Pinndorama [ACCEPTED GENUS 9837:8RV6X nidx=null]
 + Pinndorama Domahovski, 2021 [ACCEPTED GENUS 9839:9G7WF nidx=null]
Pinnixa nitida
 - Pinnixa nitida Lockington, 1876 [SYNONYM SPECIES 9837:4HZ3Y nidx=null parent=4D8SH]
 + Pinnixa nitida Lockington, 1877 [SYNONYM SPECIES 9839:9G5TQ nidx=null parent=9G5Q8]
Pitar tellinoidea
 - Pitar tellinoidea (Sowerby, 1851) [SYNONYM SPECIES 9837:6VMBW nidx=null parent=YWHC]
 + Pitar tellinoidea (G. B. Sowerby II, 1851) [SYNONYM SPECIES 9839:9G5TX nidx=null parent=YWHC]
Pitar tumidus
 - Pitar tumidus (Sowerby, 1895) [SYNONYM SPECIES 9837:6VMBZ nidx=null parent=YWHM]
 + Pitar tumidus (G. B. Sowerby III, 1895) [SYNONYM SPECIES 9839:9G5TY nidx=null parent=YWHM]
Pitaria tellinoidea
 - Pitaria tellinoidea (Sowerby, 1851) [SYNONYM SPECIES 9837:6VMD2 nidx=null parent=YWHC]
 + Pitaria tellinoidea (G. B. Sowerby II, 1851) [SYNONYM SPECIES 9839:9G5TZ nidx=null parent=YWHC]
Pitylus grossus
 - Pitylus grossus (Linnaeus, 1766) [SYNONYM SPECIES 9837:4JCJ8 nidx=null parent=6XFLD]
 + Pitylus grossus (Linnaeus, 1767) [SYNONYM SPECIES 9839:9G8JX nidx=null parent=9G6XM]
Planktonemertes agassizi
 - Planktonemertes agassizi ? [SYNONYM SPECIES 9837:9D42Z nidx=null parent=8549B]
 + Planktonemertes agassizi ? [SYNONYM SPECIES 9839:9G5V3 nidx=null parent=8549B]
Planorbella trivolvis intertextum
 - Planorbella trivolvis intertextum (Sowerby, 1878) [ACCEPTED SUBSPECIES 9837:8SYFJ nidx=null]
 + Planorbella trivolvis intertextum (G. B. Sowerby II, 1877) [ACCEPTED SUBSPECIES 9839:9G6SD nidx=null]
Planorbis (Gyraulus) albus
 - Planorbis (Gyraulus) albus (O. F. Müller, 1776) [SYNONYM SPECIES 9837:7SQQW nidx=null parent=3HYFW]
 + Planorbis (Gyraulus) albus (O. F. Müller, 1774) [SYNONYM SPECIES 9839:9G5V7 nidx=null parent=3HYFW]
Planorbis isseli
 - Planorbis isseli Sacco, 1884 [SYNONYM SPECIES 9837:4JKVH nidx=null parent=77P32]
 + Planorbis isseli Sacco, 1886 [SYNONYM SPECIES 9839:9G5V9 nidx=null parent=77P32]
Platymetopius (Platymetopius) undatus
 - Platymetopius (Platymetopius) undatus (DeGeer, 1773) [ACCEPTED SPECIES 9837:8RMW2 nidx=null]
 + Platymetopius (Platymetopius) undatus (De Geer, 1773) [ACCEPTED SPECIES 9839:9G6TN nidx=null]
Platymetopius undatus
 - Platymetopius undatus (DeGeer, 1773) [SYNONYM SPECIES 9837:8RD8V nidx=null parent=8RMW2]
 + Platymetopius undatus (De Geer, 1773) [SYNONYM SPECIES 9839:4JSVV nidx=null parent=9G6TN]
Platypetasus futtereri
 - Platypetasus futtereri (Andreae, 1903) [SYNONYM SPECIES 9837:7SQYS nidx=null parent=7STSV]
 + Platypetasus futtereri (Andreae, 1904) [SYNONYM SPECIES 9839:9G9F2 nidx=null parent=7STSV]
Platypleura nigrolinea
 - Platypleura nigrolinea (DeGeer, 1773) [SYNONYM SPECIES 9837:8JCDR nidx=null parent=4JW2L]
 + Platypleura nigrolinea (De Geer, 1773) [SYNONYM SPECIES 9839:9G9F3 nidx=null parent=4JW2L]
Platypleura ocellata
 - Platypleura ocellata (DeGeer, 1773) [AMBIGUOUS_SYNONYM SPECIES 9837:8JCDV nidx=null parent=3JJKX]
 + Platypleura ocellata (De Geer, 1773) [AMBIGUOUS_SYNONYM SPECIES 9839:9G9F4 nidx=null parent=3JJKX]
Platyprosopini
 - Platyprosopini Coiffait, 1972 [SYNONYM TRIBE 9837:8X6RD nidx=null parent=8X6RC]
 + Platyprosopini Coiffait, 1972 [SYNONYM TRIBE 9839:9G6ZL nidx=null parent=8X6RC]
Platyrhaphe (Platyrhaphe) mucronata mucronata
 - Platyrhaphe (Platyrhaphe) mucronata mucronata (Sowerby, 1843) [SYNONYM SUBSPECIES 9837:7TZSR nidx=null parent=7TZTL]
 + Platyrhaphe (Platyrhaphe) mucronata mucronata (G. B. Sowerby I, 1843) [SYNONYM SUBSPECIES 9839:9G6SG nidx=null parent=7TZTL]
Pleuromamma indica
 - Pleuromamma indica Wolfenden, 1905 [ACCEPTED SPECIES 9837:4KBRP nidx=null]
 + Pleuromamma indica Wolfenden, 1906 [ACCEPTED SPECIES 9839:9G5W4 nidx=null]
Pleurophyllidia marginata
 - Pleurophyllidia marginata Mörch, 1859 [SYNONYM SPECIES 9837:4KC93 nidx=null parent=3M5DX]
 + Pleurophyllidia marginata Ørsted & Mörch, 1859 [SYNONYM SPECIES 9839:9G5W5 nidx=null parent=9G4ZT]
Pleurotoma attenuata
 - Pleurotoma attenuata Sowerby J., 1816 [SYNONYM SPECIES 9837:8YYGQ nidx=null parent=8YMV4]
 + Pleurotoma attenuata J. Sowerby, 1816 [SYNONYM SPECIES 9839:9G5WB nidx=null parent=9GBYG]
Pleurotoma rugulata
 - Pleurotoma rugulata Reeve, 1846 [SYNONYM SPECIES 9837:783VW nidx=null parent=4MTPV]
 + Pleurotoma rugulata [sic] [SYNONYM SPECIES 9839:9G5XD nidx=null parent=4MTPV]
Podarcis lilfordi gigliolii
 - Podarcis lilfordi gigliolii (Bedriaga, 1879) [ACCEPTED SUBSPECIES 9837:7HT72 nidx=null]
 + Podarcis lilfordi gigliolii (Bedriaga, 1879) [ACCEPTED SUBSPECIES 9839:9G7TM nidx=null]
 + Podarcis lilfordi gigliolii (Bedriaga, 1879) [AMBIGUOUS_SYNONYM INFRASPECIFIC_NAME 9839:9G7TN nidx=null parent=4KPHW]
Poecilimon jonicus
 - Poecilimon jonicus Fieber, 1853 [AMBIGUOUS_SYNONYM SPECIES 9837:9DJH7 nidx=null parent=8QJPH]
 + Poecilimon jonicus (Fieber, 1853) [AMBIGUOUS_SYNONYM SPECIES 9839:9G6V2 nidx=null parent=7KNGG]
 + Poecilimon jonicus Fieber, 1853 [AMBIGUOUS_SYNONYM SPECIES 9839:9G6V3 nidx=null parent=8QJPH]
Polinices effusus
 - Polinices effusus (Swainson, 1840) [ACCEPTED SPECIES 9837:4KXXX nidx=null]
 + Polinices effusus (Swainson, 1822) [ACCEPTED SPECIES 9839:9G5YJ nidx=null]
Polycerella comyna
 - Polycerella comyna Marcus Er., 1957 [SYNONYM SPECIES 9837:4L3W4 nidx=null parent=4L3W7]
 + Polycerella comyna Er. Marcus, 1957 [SYNONYM SPECIES 9839:9G5YN nidx=null parent=4L3W7]
Polyconitidae
 - Polyconitidae Mac Gillavry, 1937 [ACCEPTED FAMILY 9837:7NKKZ nidx=null]
 + Polyconitidae MacGillavry, 1937 [ACCEPTED FAMILY 9839:9G33J nidx=null]
Polydesmus serridens
 - Polydesmus serridens Peters, 1864 [SYNONYM SPECIES 9837:4L5TS nidx=null parent=7CR8R]
 + Polydesmus serridens Peters, 1865 [SYNONYM SPECIES 9839:9G5YR nidx=null parent=9G6G4]
Polymesoda (Isodomella) naumanni
 - Polymesoda (Isodomella) naumanni (Neumayr, 1880) [SYNONYM SPECIES 9837:8ZJ39 nidx=null parent=8KTBF]
 + Polymesoda (Isodomella) naumanni (Neumayr, 1890) [SYNONYM SPECIES 9839:9GCMZ nidx=null parent=8KTBF]
Polystomatidea
 - Polystomatidea Lebedev, 1988 [ACCEPTED ORDER 9837:7NG9G nidx=null]
 + Polystomatidea Lebedev, 1988 [ACCEPTED ORDER 9839:9G25N nidx=null]
Pontalmyra medeae
 - Pontalmyra medeae (Davitashvili, 1933) [ACCEPTED SPECIES 9837:878WT nidx=null]
 + Pontalmyra medeae (Davitashvili, 1932) [ACCEPTED SPECIES 9839:9G9FH nidx=null]
Potamides concavus
 - Potamides concavus Sowerby J., 1822 [SYNONYM SPECIES 9837:8ZHZB nidx=null parent=8YPNJ]
 + Potamides concavus J. Sowerby, 1822 [SYNONYM SPECIES 9839:9GCMY nidx=null parent=9GC4B]
Potamilus metnecktayi
 - Potamilus metnecktayi Johnson R.I., 1998 [ACCEPTED SPECIES 9837:4M3D6 nidx=null]
 + Potamilus metnecktayi R. I. Johnson, 1998 [ACCEPTED SPECIES 9839:9G5Z3 nidx=null]
Propebela angulosa
 - Propebela angulosa (Sars G. O., 1878) [ACCEPTED SPECIES 9837:6VY3H nidx=null]
 + Propebela angulosa (G. O. Sars, 1878) [ACCEPTED SPECIES 9839:9G5ZF nidx=null]
Propebela assimilis
 - Propebela assimilis (Sars G. O., 1878) [ACCEPTED SPECIES 9837:4MTND nidx=null]
 + Propebela assimilis (G. O. Sars, 1878) [ACCEPTED SPECIES 9839:9G5ZG nidx=null]
Propebela scalaroides
 - Propebela scalaroides (Sars G. O., 1878) [ACCEPTED SPECIES 9837:4MTPX nidx=null]
 + Propebela scalaroides (G. O. Sars, 1878) [ACCEPTED SPECIES 9839:9G5ZH nidx=null]
Prosodacnomya osijeki
 - Prosodacnomya osijeki (Basch, 1991) [ACCEPTED SPECIES 9837:876JF nidx=null]
 + Prosodacnomya osijeki (Basch, 1990) [ACCEPTED SPECIES 9839:9G9FM nidx=null]
Protomedea ornata
 - Protomedea ornata Costa O.G., 1861 [SYNONYM SPECIES 9837:4N5XY nidx=null parent=QTWK]
 + Protomedea ornata O. G. Costa, 1861 [SYNONYM SPECIES 9839:9G5ZM nidx=null parent=QTWK]
Protostaphylinus mirus
 - Protostaphylinus mirus Lin, Qibin, 1976 [ACCEPTED SPECIES 9837:4N76Q nidx=null]
 + Protostaphylinus mirus Lin, Qibin, 1976 [ACCEPTED SPECIES 9839:9G6VH nidx=null]
Protothaca asperrima
 - Protothaca asperrima (Sowerby, 1835) [SYNONYM SPECIES 9837:4N7DV nidx=null parent=727C5]
 + Protothaca asperrima (G. B. Sowerby I, 1835) [SYNONYM SPECIES 9839:9G5ZN nidx=null parent=727C5]
Psaltoda harrisii
 - Psaltoda harrisii (Leach, 1814) [ACCEPTED SPECIES 9837:78C24 nidx=null]
 + Psaltoda harrisii (Leach, 1814) [ACCEPTED SPECIES 9839:9G9FN nidx=null]
Psammotettix jenjouristi
 - Psammotettix jenjouristi (Zachvatkin, 1933) [ACCEPTED SPECIES 9837:8RN3S nidx=null]
 + Psammotettix jenjouristi (Zakhvatkin, 1933) [ACCEPTED SPECIES 9839:9G9FS nidx=null]
Psammotettix koeleriae
 - Psammotettix koeleriae Zachvatkin, 1948 [ACCEPTED SPECIES 9837:4ND8K nidx=null]
 + Psammotettix koeleriae Zakhvatkin, 1948 [ACCEPTED SPECIES 9839:9G6VM nidx=null]
Psammotettix orientalior
 - Psammotettix orientalior Zachvatkin, 1945 [ACCEPTED SPECIES 9837:8RN3W nidx=null]
 + Psammotettix orientalior Zakhvatkin, 1945 [ACCEPTED SPECIES 9839:9G9FT nidx=null]
Psammotettix orientalior badghyzicus
 - Psammotettix orientalior badghyzicus Zachvatkin, 1945 [SYNONYM SUBSPECIES 9837:8RSQD nidx=null parent=8RN3W]
 + Psammotettix orientalior badghyzicus Zakhvatkin, 1945 [SYNONYM SUBSPECIES 9839:9G9P5 nidx=null parent=9G9FT]
Pseudamussium sulcatum
 - Pseudamussium sulcatum (Müller O. F., 1776) [SYNONYM SPECIES 9837:4NK3T nidx=null parent=3R2W4]
 + Pseudamussium sulcatum (O. F. Müller, 1776) [SYNONYM SPECIES 9839:9G5ZS nidx=null parent=3R2W4]
Pseudolivella branderi
 - Pseudolivella branderi (Sowerby J., 1821) [ACCEPTED SPECIES 9837:8YNSJ nidx=null]
 + Pseudolivella branderi (J. Sowerby, 1821) [ACCEPTED SPECIES 9839:9GC2Q nidx=null]
Pseudomalletia obtusa
 - Pseudomalletia obtusa (Sars G. O., 1872) [SYNONYM SPECIES 9837:7SV4H nidx=null parent=7S265]
 + Pseudomalletia obtusa (G. O. Sars, 1872) [SYNONYM SPECIES 9839:9G624 nidx=null parent=7S265]
Pseudonapaeus labiellus
 - Pseudonapaeus labiellus (E. v. Martens, 1880) [ACCEPTED SPECIES 9837:7SV8T nidx=null]
 + Pseudonapaeus labiellus (E. von Martens, 1881) [ACCEPTED SPECIES 9839:9G625 nidx=null]
Pseudophilyra nanshaensis
 - Pseudophilyra nanshaensis HL Chen, 1995 [ACCEPTED SPECIES 9837:4P79X nidx=null]
 + Pseudophilyra nanshaensis Chen, 1996 [ACCEPTED SPECIES 9839:9G62P nidx=null]
Pseudophlepsius
 - Pseudophlepsius Zachvatkin, 1924 [ACCEPTED GENUS 9837:8R5Z2 nidx=null]
 + Pseudophlepsius Zakhvatkin, 1924 [ACCEPTED GENUS 9839:9G3L2 nidx=null]
Pseudophlepsius binotatus pseudoalhageos
 - Pseudophlepsius binotatus pseudoalhageos Zachvatkin, 1953 [SYNONYM SUBSPECIES 9837:8RRF2 nidx=null parent=6WH9V]
 + Pseudophlepsius binotatus pseudoalhageos Zakhvatkin, 1953 [SYNONYM SUBSPECIES 9839:9G9P6 nidx=null parent=6WH9V]
Pseudophlepsius binotatus septentrionalis
 - Pseudophlepsius binotatus septentrionalis Zachvatkin, 1953 [SYNONYM SUBSPECIES 9837:8RSNM nidx=null parent=6WH9V]
 + Pseudophlepsius binotatus septentrionalis Zakhvatkin, 1953 [SYNONYM SUBSPECIES 9839:9G9P7 nidx=null parent=6WH9V]
Pseudophlepsius septentrionalis
 - Pseudophlepsius septentrionalis Zachvatkin, 1953 [SYNONYM SPECIES 9837:8RN4C nidx=null parent=6WH9V]
 + Pseudophlepsius septentrionalis Zakhvatkin, 1953 [SYNONYM SPECIES 9839:9G9FY nidx=null parent=6WH9V]
Pseudosabinia
 - Pseudosabinia Morris & Skelton, 1995 [ACCEPTED GENUS 9837:7PDYQ nidx=null]
 + Pseudosabinia N. Morris & Skelton, 1996 [ACCEPTED GENUS 9839:9G3WL nidx=null]
Pseudovermis axi
 - Pseudovermis axi Marcus Ev. & Er., 1955 [ACCEPTED SPECIES 9837:78HHY nidx=null]
 + Pseudovermis axi Ev. Marcus & Er. Marcus, 1955 [ACCEPTED SPECIES 9839:9G63B nidx=null]
Pseudovermis schultzi
 - Pseudovermis schultzi Marcus Ev. & Er., 1955 [ACCEPTED SPECIES 9837:78JB8 nidx=null]
 + Pseudovermis schultzi Ev. Marcus & Er. Marcus, 1955 [ACCEPTED SPECIES 9839:9G63C nidx=null]
Pterocyclos subulatus
 - Pterocyclos subulatus Benson, 1903 [ACCEPTED SPECIES 9837:7SVTX nidx=null]
 + Pterocyclos subulatus [sic] [SYNONYM SPECIES 9839:9G63J nidx=null parent=78KL4]
Pterocyclus subulatus
 - Pterocyclus subulatus Benson, 1903 [SYNONYM SPECIES 9837:7SVWT nidx=null parent=7SVTX]
 + Pterocyclus subulatus Sykes, 1903 [SYNONYM SPECIES 9839:9G63K nidx=null parent=78KL4]
Ptychocochlis corrugata
 - Ptychocochlis corrugata (Menke, 1830) [SYNONYM SPECIES 9837:7SVYP nidx=null parent=7SSXL]
 + Ptychocochlis corrugata (Menke, 1829) [SYNONYM SPECIES 9839:9G9G6 nidx=null parent=7SSXL]
Ptychognathus johannae
 - Ptychognathus johannae Rathbun, 1914 [ACCEPTED SPECIES 9837:6WNLT nidx=null]
 + Ptychognathus johannae Rathbun, 1913 [ACCEPTED SPECIES 9839:9G63N nidx=null]
Puncturella dorcas
 - Puncturella dorcas Kira & Habe, 1951 [ACCEPTED SPECIES 9837:6WPGG nidx=null]
 + Puncturella dorcas Kira & Habe, 1949 [ACCEPTED SPECIES 9839:9G63Q nidx=null]
Purpuranus
 - Purpuranus Zachvatkin, 1933 [SYNONYM GENUS 9837:8JLWQ nidx=null parent=8HSP6]
 + Purpuranus Zakhvatkin, 1933 [SYNONYM GENUS 9839:9G7WX nidx=null parent=8HSP6]
Pyrgiscus fulvizonatus
 - Pyrgiscus fulvizonatus (Melvill, 1910) [SYNONYM SPECIES 9837:4QSXL nidx=null parent=59NQH]
 + Pyrgiscus fulvizonatus (Nomura, 1938) [SYNONYM SPECIES 9839:9G63Z nidx=null parent=59NQH]
Quoyula madreporarum
 - Quoyula madreporarum (G. B. Sowerby I, 1832) [SYNONYM SPECIES 9837:99P4N nidx=null parent=Y9ZS]
 + Quoyula madreporarum (G. B. Sowerby I, 1834) [SYNONYM SPECIES 9839:9G646 nidx=null parent=6JVJB]
Raphitoma amoena
 - Raphitoma amoena Sars G.O., 1878 [SYNONYM SPECIES 9837:4RKR9 nidx=null parent=4735B]
 + Raphitoma amoena G. O. Sars, 1878 [SYNONYM SPECIES 9839:9G648 nidx=null parent=4735B]
Raphitoma crassifunata
 - Raphitoma crassifunata Morellet J., 1943 [ACCEPTED SPECIES 9837:8YNW7 nidx=null]
 + Raphitoma crassifunata J. Morellet, 1943 [ACCEPTED SPECIES 9839:9GC2Z nidx=null]
Recilia elongatoocellata
 - Recilia elongatoocellata (de Motschulsky, 1859) [ACCEPTED SPECIES 9837:7YR78 nidx=null]
 - Recilia elongatoocellata (de Motschulsky, 1859) [AMBIGUOUS_SYNONYM SPECIES 9837:8RDS3 nidx=null parent=8RS8W]
 + Recilia elongatoocellata (Motschulsky, 1859) [ACCEPTED SPECIES 9839:4RNTG nidx=null]
Recilia elongatoocellata jenjouristi
 - Recilia elongatoocellata jenjouristi Zachvatkin, 1935 [ACCEPTED SUBSPECIES 9837:7HYVT nidx=null]
 + Recilia elongatoocellata jenjouristi Zakhvatkin, 1935 [ACCEPTED SUBSPECIES 9839:9G7WZ nidx=null]
Recilia elongatoocellata var. jenjouristi
 - Recilia elongatoocellata var. jenjouristi Zachvatkin, 1935 [SYNONYM VARIETY 9837:8RRCN nidx=null parent=7HYVT]
 + Recilia elongatoocellata var. jenjouristi Zakhvatkin, 1935 [SYNONYM VARIETY 9839:9G7WY nidx=null parent=9G7WZ]
Recilia jenjouristi
 - Recilia jenjouristi Zachvatkin, 1935 [SYNONYM SPECIES 9837:8RN5C nidx=null parent=7HYVT]
 + Recilia jenjouristi Zakhvatkin, 1935 [SYNONYM SPECIES 9839:9G9GF nidx=null parent=9G7WZ]
Rhysota (Hemiplecta) darondeaui
 - Rhysota (Hemiplecta) darondeaui (Souleyet, 1842) [SYNONYM SPECIES 9837:8HWWJ nidx=null parent=7RNL9]
 + Rhysota (Hemiplecta) darondeaui [sic] [SYNONYM SPECIES 9839:9G9GL nidx=null parent=7RNL9]
Ribautiana
 - Ribautiana Zachvatkin, 1947 [ACCEPTED GENUS 9837:8HQP4 nidx=null]
 + Ribautiana Zakhvatkin, 1947 [ACCEPTED GENUS 9839:9G24P nidx=null]
Ribautiana ognevi
 - Ribautiana ognevi (Zachvatkin, 1948) [ACCEPTED SPECIES 9837:4SY4L nidx=null]
 + Ribautiana ognevi (Zakhvatkin, 1948) [ACCEPTED SPECIES 9839:9G6XK nidx=null]
Ribautiana tenerrima disjuncta
 - Ribautiana tenerrima disjuncta Zachvatkin, 1947 [SYNONYM SUBSPECIES 9837:5KXL5 nidx=null parent=4SY4V]
 + Ribautiana tenerrima disjuncta Zakhvatkin, 1947 [SYNONYM SUBSPECIES 9839:9G7XF nidx=null parent=4SY4V]
Ribautiella
 - Ribautiella Zachvatkin, 1933 [SYNONYM GENUS 9837:8HQLW nidx=null parent=8HCX3]
 + Ribautiella Zakhvatkin, 1933 [SYNONYM GENUS 9839:9G3X3 nidx=null parent=8HCX3]
Ribautiellus
 - Ribautiellus Zachvatkin, 1933 [SYNONYM GENUS 9837:8JLY3 nidx=null parent=8HCX3]
 + Ribautiellus Zakhvatkin, 1933 [SYNONYM GENUS 9839:9G7X6 nidx=null parent=8HCX3]
Ribaytiana
 - Ribaytiana Zachvatkin, 1947 [SYNONYM GENUS 9837:8JLY2 nidx=null parent=8HQP4]
 + Ribaytiana Zakhvatkin, 1947 [SYNONYM GENUS 9839:9G7X7 nidx=null parent=9G24P]
Rihana lyricen
 - Rihana lyricen (DeGeer, 1773) [SYNONYM SPECIES 9837:8JYRM nidx=null parent=8K2K8]
 + Rihana lyricen (De Geer, 1773) [SYNONYM SPECIES 9839:9G9GN nidx=null parent=9G8M6]
Risbecia godeffroyana
 - Risbecia godeffroyana (Bergh, 1977) [SYNONYM SPECIES 9837:4T52N nidx=null parent=3P33Q]
 + Risbecia godeffroyana (Bergh, 1877) [SYNONYM SPECIES 9839:9G64H nidx=null parent=3P33Q]
Rissoa angulata
 - Rissoa angulata Seguenza G., 1876 [AMBIGUOUS_SYNONYM SPECIES 9837:4T5B3 nidx=null parent=CBQR]
 + Rissoa angulata G. Seguenza, 1876 [SYNONYM SPECIES 9839:9G64L nidx=null parent=CBQR]
Rissoa elegantissima
 - Rissoa elegantissima Seguenza G., 1876 [AMBIGUOUS_SYNONYM SPECIES 9837:4T5GF nidx=null parent=CBR8]
 + Rissoa elegantissima G. Seguenza, 1876 [SYNONYM SPECIES 9839:9G64Q nidx=null parent=CBR8]
Rissoa fraudulenta
 - Rissoa fraudulenta Melvill & Standen, 1907 [SYNONYM SPECIES 9837:4T5HJ nidx=null parent=49KRW]
 + Rissoa fraudulenta [SYNONYM SPECIES 9839:9G64S nidx=null parent=49KRW]
Rissoa interrupta var. bifasciata
 - Rissoa interrupta var. bifasciata Sars G.O., 1878 [SYNONYM VARIETY 9837:5R88H nidx=null parent=7994R]
 + Rissoa interrupta var. bifasciata G. O. Sars, 1878 [SYNONYM VARIETY 9839:9G6WH nidx=null parent=7994R]
Rissoa intersecta
 - Rissoa intersecta Wood S., 1857 [SYNONYM SPECIES 9837:4T5KQ nidx=null parent=48BFG]
 + Rissoa intersecta S. V. Wood, 1857 [SYNONYM SPECIES 9839:9G64V nidx=null parent=48BFG]
Rissoa seminuda
 - Rissoa seminuda Seguenza L., 1903 [SYNONYM SPECIES 9837:4T5TH nidx=null parent=4QKXW]
 + Rissoa seminuda L. Seguenza, 1903 [SYNONYM SPECIES 9839:9G652 nidx=null parent=4QKXW]
Rissoa soluta var. laevis
 - Rissoa soluta var. laevis Sars M., 1870 [SYNONYM VARIETY 9837:5R88Z nidx=null parent=78GGB]
 + Rissoa soluta var. laevis M. Sars, 1870 [SYNONYM VARIETY 9839:9G6WK nidx=null parent=78GGB]
Rissoa sowerbyi
 - Rissoa sowerbyi W. H. Turton, 1932 [ACCEPTED SPECIES 9837:6WX55 nidx=null]
 + Rissoa sowerbyi Deshayes, 1838 [SYNONYM SPECIES 9839:9G655 nidx=null parent=9GJCR]
Rissoia (Alvania) plicata var. lyalliana
 - Rissoia (Alvania) plicata var. lyalliana Suter, 1908 [SYNONYM VARIETY 9837:7V9FF nidx=null parent=3ZTM4]
 + Rissoia (Alvania) plicata var. lyalliana Suter, 1898 [SYNONYM VARIETY 9839:9G6WL nidx=null parent=3ZTM4]
Rostanga atrata
 - Rostanga atrata (Kelaart, 1859) [SYNONYM SPECIES 9837:4TFH2 nidx=null parent=34Q6B]
 + Rostanga atrata (Kelaart, 1858) [SYNONYM SPECIES 9839:9G65P nidx=null parent=34Q6B]
Rostrisepta parva
 - Rostrisepta parva Seguenza G., 1866 [SYNONYM SPECIES 9837:4TFPX nidx=null parent=6W9S4]
 + Rostrisepta parva G. Seguenza, 1866 [SYNONYM SPECIES 9839:9G65Q nidx=null parent=6W9S4]
Rotella gigantea
 - Rotella gigantea Lesson, 1831 [SYNONYM SPECIES 9837:4TG82 nidx=null parent=7DGHY]
 + Rotella gigantea Lesson, 1832 [SYNONYM SPECIES 9839:9G65R nidx=null parent=9G6JY]
Rotundopotamonautes bourgaultae
 - Rotundopotamonautes bourgaultae (Cumberlidge & Meyer, 2009) [ACCEPTED SPECIES 9837:9FY8W nidx=null]
 + Rotundopotamonautes bourgaultae (Cumberlidge & Meyer, 2011) [ACCEPTED SPECIES 9839:9GDGC nidx=null]
Rotundopotamonautes holthuisi
 - Rotundopotamonautes holthuisi (Cumberlidge & Meyer, 2009) [ACCEPTED SPECIES 9837:9FY6C nidx=null]
 + Rotundopotamonautes holthuisi (Cumberlidge & Meyer, 2010) [ACCEPTED SPECIES 9839:9GDG7 nidx=null]
Ryssota lamarckiana
 - Ryssota lamarckiana (Lea, 1852) [SYNONYM SPECIES 9837:7T37T nidx=null parent=7TWNN]
 + Ryssota lamarckiana (I. Lea, 1840) [SYNONYM SPECIES 9839:9G65S nidx=null parent=7TWNN]
Sabellides brevicirrata
 - Sabellides brevicirrata McIntosh, 1922 [SYNONYM SPECIES 9837:4TV7J nidx=null parent=CDBQ]
 + Sabellides brevicirrata [auct. misspelling for 'brevicaudata'] [SYNONYM SPECIES 9839:9G4LB nidx=null parent=CDBQ]
Sahlbergiini
 - Sahlbergiini Kistner, 1993 [ACCEPTED TRIBE 9837:8X6SD nidx=null]
 + Sahlbergiini Kistner, 1993 [ACCEPTED TRIBE 9839:9G6ZM nidx=null]
Sahlbergotettix
 - Sahlbergotettix Zachvatkin, 1953 [ACCEPTED GENUS 9837:8JLYM nidx=null]
 + Sahlbergotettix Zakhvatkin, 1953 [ACCEPTED GENUS 9839:9G7XC nidx=null]
Salbergotettix
 - Salbergotettix Zachvatkin, 1953 [SYNONYM GENUS 9837:8RV4T nidx=null parent=8JLYM]
 + Salbergotettix Zakhvatkin, 1953 [SYNONYM GENUS 9839:9G7XD nidx=null parent=9G7XC]
Saltator grossus
 - Saltator grossus (Linnaeus, 1766) [ACCEPTED SPECIES 9837:6XFLD nidx=null]
 + Saltator grossus (Linnaeus, 1767) [ACCEPTED SPECIES 9839:9G6XM nidx=null]
Saltator grossus grossus
 - Saltator grossus grossus (Linnaeus, 1766) [ACCEPTED SUBSPECIES 9837:5KZK9 nidx=null]
 + Saltator grossus grossus (Linnaeus, 1767) [ACCEPTED SUBSPECIES 9839:9G7Y6 nidx=null]
Saxidomus nuttalli latus
 - Saxidomus nuttalli latus Stewart in Woodring et al., 1941 [SYNONYM SUBSPECIES 9837:7KRWB nidx=null parent=79R3G]
 + Saxidomus nuttalli latus Stewart, 1940 [SYNONYM SUBSPECIES 9839:9G6SW nidx=null parent=79R3G]
Scala (Clathrus) histriaca
 - Scala (Clathrus) histriaca Fenaux, 1943 [SYNONYM SPECIES 9837:8YNZB nidx=null parent=6FXL3]
 + Scala (Clathrus) histriaca [sic] [SYNONYM SPECIES 9839:9GC39 nidx=null parent=6FXL3]
Scalaria brevissima
 - Scalaria brevissima Seguenza G., 1876 [SYNONYM SPECIES 9837:6XSL9 nidx=null parent=6G9L8]
 + Scalaria brevissima G. Seguenza, 1876 [SYNONYM SPECIES 9839:9G667 nidx=null parent=6G9L8]
Scalaria histriaca
 - Scalaria histriaca Fenaux, 1943 [SYNONYM SPECIES 9837:8WX7N nidx=null parent=6FXL3]
 + Scalaria histriaca [sic] [SYNONYM SPECIES 9839:9G66C nidx=null parent=6FXL3]
Scalaria polygyrella
 - Scalaria polygyrella Fischer P. in Locard, 1897 [SYNONYM SPECIES 9837:79SCV nidx=null parent=774PQ]
 + Scalaria polygyrella P. Fischer, 1897 [SYNONYM SPECIES 9839:9G66D nidx=null parent=774PQ]
Scalaria semicostata
 - Scalaria semicostata Sowerby J., 1814 [SYNONYM SPECIES 9837:8ZFZF nidx=null parent=8YKZ9]
 + Scalaria semicostata J. Sowerby, 1814 [SYNONYM SPECIES 9839:9GCMJ nidx=null parent=9GBVV]
Scalenostoma thomasiae
 - Scalenostoma thomasiae (Sowerby, 1878) [SYNONYM SPECIES 9837:7T46W nidx=null parent=6Y4CK]
 + Scalenostoma thomasiae (G. B. Sowerby II, 1878) [SYNONYM SPECIES 9839:9G66K nidx=null parent=6Y4CK]
Scalenostoma thomasii
 - Scalenostoma thomasii (Sowerby, 1884) [SYNONYM SPECIES 9837:7T46X nidx=null parent=6Y4CK]
 + Scalenostoma thomasii (G. B. Sowerby II, 1884) [SYNONYM SPECIES 9839:9G66L nidx=null parent=6Y4CK]
Scapophyllia menzelensis
 - Scapophyllia menzelensis Chevalier, 1962 [SYNONYM SPECIES 9837:9FPH2 nidx=null parent=9FXXJ]
 + Scapophyllia menzelensis Chevalier, 1961 [SYNONYM SPECIES 9839:9GCHS nidx=null parent=9FXXJ]
Scariites
 - Scariites Hamilton, 1992 [SYNONYM GENUS 9837:8RVFQ nidx=null parent=8JKRG]
 + Scariites Hamilton, 1996 [ACCEPTED GENUS 9839:9G7XH nidx=null]
Sceptobiini
 - Sceptobiini Seevers, 1978 [ACCEPTED TRIBE 9837:8X6SK nidx=null]
 + Sceptobiini Seevers, 1978 [ACCEPTED TRIBE 9839:9G6ZN nidx=null]
Schizoglyphidae
 - Schizoglyphidae [ACCEPTED FAMILY 9837:G2Y nidx=null]
 + Schizoglyphidae Mahunka, 1978 [ACCEPTED FAMILY 9839:9G7L6 nidx=null]
Scieroptera sanguinea
 - Scieroptera sanguinea (DeGeer, 1773) [SYNONYM SPECIES 9837:8JF62 nidx=null parent=8JJKB]
 + Scieroptera sanguinea (De Geer, 1773) [SYNONYM SPECIES 9839:9G9GW nidx=null parent=9G9MX]
Scintilla recondita
 - Scintilla recondita Fischer P. in de Folin, 1872 [SYNONYM SPECIES 9837:4VKMS nidx=null parent=4ZDNK]
 + Scintilla recondita P. Fischer, 1872 [SYNONYM SPECIES 9839:9G66X nidx=null parent=4ZDNK]
Selenocephalus obsoletus rossicus
 - Selenocephalus obsoletus rossicus Zachvatkin, 1945 [ACCEPTED SUBSPECIES 9837:8K2LR nidx=null]
 + Selenocephalus obsoletus rossicus Zakhvatkin, 1945 [ACCEPTED SUBSPECIES 9839:9G9PG nidx=null]
Selenocephalus rossicus
 - Selenocephalus rossicus Zachvatkin, 1945 [SYNONYM SPECIES 9837:8JF7Q nidx=null parent=8K2LR]
 + Selenocephalus rossicus Zakhvatkin, 1945 [SYNONYM SPECIES 9839:9G6XY nidx=null parent=9G9PG]
Selenocephalus rossicus rossicus
 - Selenocephalus rossicus rossicus Zachvatkin, 1945 [SYNONYM INFRASPECIFIC_NAME 9837:8K2LS nidx=null parent=8K2LR]
 + Selenocephalus rossicus rossicus Zakhvatkin, 1945 [SYNONYM INFRASPECIFIC_NAME 9839:9G9LR nidx=null parent=9G9PG]
Selenocephalus rossicus tesquicola
 - Selenocephalus rossicus tesquicola Zachvatkin, 1945 [SYNONYM SUBSPECIES 9837:8JJ5K nidx=null parent=8K2LR]
 + Selenocephalus rossicus tesquicola Zakhvatkin, 1945 [SYNONYM SUBSPECIES 9839:9G7YN nidx=null parent=9G9PG]
Selenocephalus stenopterus simavensis
 - Selenocephalus stenopterus simavensis Zachvatkin, 1946 [SYNONYM SUBSPECIES 9837:8JJ5L nidx=null parent=4WDG9]
 + Selenocephalus stenopterus simavensis Zakhvatkin, 1946 [SYNONYM SUBSPECIES 9839:9G7YP nidx=null parent=4WDG9]
Selenocephalus stenopterus tauricus
 - Selenocephalus stenopterus tauricus Zachvatkin, 1946 [SYNONYM SUBSPECIES 9837:8JJ5M nidx=null parent=4WDG9]
 + Selenocephalus stenopterus tauricus Zakhvatkin, 1946 [SYNONYM SUBSPECIES 9839:9G7YQ nidx=null parent=4WDG9]
Selenocephalus uvarovi
 - Selenocephalus uvarovi Zachvatkin, 1946 [ACCEPTED SPECIES 9837:4WDGH nidx=null]
 - Selenocephalus uvarovi Zachvatkin, 1945 [SYNONYM SPECIES 9837:8JF7T nidx=null parent=4WDGH]
 + Selenocephalus uvarovi Zakhvatkin, 1946 [ACCEPTED SPECIES 9839:9G6XZ nidx=null]
Semailia
 - Semailia Morris & Skelton, 1995 [ACCEPTED GENUS 9837:7PGJ2 nidx=null]
 + Semailia N. Morris & Skelton, 1996 [ACCEPTED GENUS 9839:9G3XB nidx=null]
Semelangulus unifasciatus
 - Semelangulus unifasciatus (Sowerby, 1867) [SYNONYM SPECIES 9837:4WFS2 nidx=null parent=47JJV]
 + Semelangulus unifasciatus (G. B. Sowerby II, 1867) [SYNONYM SPECIES 9839:9G676 nidx=null parent=47JJV]
Semele (Abra) profundorum
 - Semele (Abra) profundorum Smith E.A., 1885 [SYNONYM SPECIES 9837:6YFQV nidx=null parent=8LGN]
 + Semele (Abra) profundorum E. A. Smith, 1885 [SYNONYM SPECIES 9839:9G677 nidx=null parent=8LGN]
Semele crenulata
 - Semele crenulata (Reeve, 1853) [ACCEPTED SPECIES 9837:4WFTV nidx=null]
 + Semele crenulata (G. B. Sowerby I, 1853) [ACCEPTED SPECIES 9839:9G678 nidx=null]
Semele piperata var. atterina
 - Semele piperata var. atterina de Gregorio, 1884 [SYNONYM VARIETY 9837:7MPPF nidx=null parent=4VYNX]
 + Semele piperata var. atterina De Gregorio, 1885 [SYNONYM VARIETY 9839:9G6WM nidx=null parent=4VYNX]
Serica pilosella
 - Serica pilosella Brenske, 1894 [SYNONYM SPECIES 9837:4WTSY nidx=null parent=3SGCB]
 + Serica pilosella Brenske, 1896 [SYNONYM SPECIES 9839:9G4VQ nidx=null parent=9G4RP]
Setodini
 - Setodini Morse, 1981 [ACCEPTED TRIBE 9837:L8F nidx=null]
 + Setodini Morse, 1981 [ACCEPTED TRIBE 9839:9G6ZP nidx=null]
Shaddai hummeli
 - Shaddai hummeli (Zachvatkin, 1936) [ACCEPTED SPECIES 9837:6YM9H nidx=null]
 + Shaddai hummeli (Zakhvatkin, 1936) [ACCEPTED SPECIES 9839:9G6Y5 nidx=null]
Shibinga
 - Shibinga [ACCEPTED GENUS 9837:8KHM9 nidx=null]
 + Shibinga Song, Yuan & Jiang, 2021 [ACCEPTED GENUS 9839:9G7XJ nidx=null]
Sicrana
 - Sicrana [ACCEPTED GENUS 9837:8KHTK nidx=null]
 + Sicrana Gonçalves, Domahovski, Mejdalani & Takiya, 2021 [ACCEPTED GENUS 9839:9G7XK nidx=null]
Siliquaria senegalensis
 - Siliquaria senegalensis (Mörch, 1860) [SYNONYM SPECIES 9837:4XDN4 nidx=null parent=7BR4V]
 + Siliquaria senegalensis Mörch, 1861 [SYNONYM SPECIES 9839:9G688 nidx=null parent=7BR4V]
Sinalebra
 - Sinalebra Zachvatkin, 1936 [SYNONYM GENUS 9837:8JM28 nidx=null parent=8HR2Q]
 + Sinalebra Zakhvatkin, 1936 [SYNONYM GENUS 9839:9G7XL nidx=null parent=8HR2Q]
Sinalebra hummeli
 - Sinalebra hummeli Zachvatkin, 1936 [SYNONYM SPECIES 9837:6YRCH nidx=null parent=6YM9H]
 + Sinalebra hummeli Zakhvatkin, 1936 [SYNONYM SPECIES 9839:9G6YC nidx=null parent=9G6Y5]
Sinanodonta japonica
 - Sinanodonta japonica (von Martens in Clessin, 1874) [SYNONYM SPECIES 9837:7T5HF nidx=null parent=7QBTW]
 + Sinanodonta japonica (Clessin, 1874) [SYNONYM SPECIES 9839:9G68F nidx=null parent=9G7G3]
Sipho tortuosus var. attenuata
 - Sipho tortuosus var. attenuata Sars G.O., 1878 [SYNONYM VARIETY 9837:5RJ7R nidx=null parent=XD3D]
 + Sipho tortuosus var. attenuata G. O. Sars, 1878 [SYNONYM VARIETY 9839:9G6WP nidx=null parent=XD3D]
Siphonium maximum
 - Siphonium maximum (Sowerby, 1825) [SYNONYM SPECIES 9837:4XPPX nidx=null parent=SGDG]
 + Siphonium maximum (G. B. Sowerby I, 1825) [SYNONYM SPECIES 9839:9G68G nidx=null parent=SGDG]
Siphonochelus (Laevityphis) muticus
 - Siphonochelus (Laevityphis) muticus (Sowerby J. de C., 1835) [SYNONYM SPECIES 9837:8Z9GG nidx=null parent=8YXML]
 + Siphonochelus (Laevityphis) muticus (J. de C. Sowerby, 1835) [SYNONYM SPECIES 9839:9GB42 nidx=null parent=8YXML]
Siphonodentalium affine
 - Siphonodentalium affine Sars M., 1865 [SYNONYM SPECIES 9837:6YR5C nidx=null parent=4QGX4]
 + Siphonodentalium affine M. Sars, 1865 [SYNONYM SPECIES 9839:9G68H nidx=null parent=4QGX4]
Siphonodentalium subfusiforme
 - Siphonodentalium subfusiforme Sars M., 1865 [SYNONYM SPECIES 9837:6YR3J nidx=null parent=P7LP]
 + Siphonodentalium subfusiforme M. Sars, 1865 [SYNONYM SPECIES 9839:9G68J nidx=null parent=P7LP]
Siphonodictyon infestum
 - Siphonodictyon infestum (Johnson, 1889) [ACCEPTED SPECIES 9837:4XPVT nidx=null]
 + Siphonodictyon infestum (Johnson, 1899) [ACCEPTED SPECIES 9839:9G68K nidx=null]
Siphonodictyon insidiosum
 - Siphonodictyon insidiosum (Johnson, 1889) [ACCEPTED SPECIES 9837:6Z2RJ nidx=null]
 + Siphonodictyon insidiosum (Johnson, 1899) [ACCEPTED SPECIES 9839:9G68L nidx=null]
Skenea planorbis
 - Skenea planorbis (Fabricius O., 1780) [SYNONYM SPECIES 9837:6YSGW nidx=null parent=6Z3YK]
 + Skenea planorbis (O. Fabricius, 1780) [SYNONYM SPECIES 9839:9G68R nidx=null parent=6Z3YK]
Skenea rugulosa
 - Skenea rugulosa (Sars G. O., 1878) [ACCEPTED SPECIES 9837:6Z4GX nidx=null]
 + Skenea rugulosa (G. O. Sars, 1878) [ACCEPTED SPECIES 9839:9G68S nidx=null]
Solarium cancellatum
 - Solarium cancellatum F. Krauss, 1848 [SYNONYM SPECIES 9837:8V9DR nidx=null parent=8V97S]
 + Solarium cancellatum Krauss, 1848 [SYNONYM SPECIES 9839:4Y52T nidx=null parent=8V97S]
Solarium sulcatum
 - Solarium sulcatum Costa O.G., 1841 [SYNONYM SPECIES 9837:8V9GK nidx=null parent=8V7JV]
 + Solarium sulcatum O. G. Costa, 1841 [SYNONYM SPECIES 9839:9G68Y nidx=null parent=8V7JV]
Solatisonax alleryi
 - Solatisonax alleryi (Seguenza G., 1876) [ACCEPTED SPECIES 9837:8V9GS nidx=null]
 + Solatisonax alleryi (G. Seguenza, 1876) [ACCEPTED SPECIES 9839:9G68Z nidx=null]
Solecardia obliqua
 - Solecardia obliqua (Sowerby, 1862) [SYNONYM SPECIES 9837:4Y5DP nidx=null parent=4VKL9]
 + Solecardia obliqua (G. B. Sowerby II, 1862) [SYNONYM SPECIES 9839:9G693 nidx=null parent=4VKL9]
Solen jonesii
 - Solen jonesii Sowerby, 1874 [ACCEPTED SPECIES 9837:4Y5MC nidx=null]
 + Solen jonesii [sic] [SYNONYM SPECIES 9839:9G694 nidx=null parent=4Y5LR]
Solen philippianus
 - Solen philippianus Sowerby, 1874 [SYNONYM SPECIES 9837:4Y5NL nidx=null parent=4Y5Q4]
 + Solen philippianus G. B. Sowerby II, 1874 [SYNONYM SPECIES 9839:9G695 nidx=null parent=4Y5Q4]
Solena gracilis
 - Solena gracilis (Sowerby J. de C, 1844) [ACCEPTED SPECIES 9837:8X6CS nidx=null]
 + Solena gracilis (J. de C. Sowerby, 1844) [ACCEPTED SPECIES 9839:9G6Y3 nidx=null]
Solenopyx kozhevnikovi
 - Solenopyx kozhevnikovi (Zachvatkin, 1938) [SYNONYM SPECIES 9837:8RNHX nidx=null parent=8RKC5]
 + Solenopyx kozhevnikovi (Zakhvatkin, 1938) [SYNONYM SPECIES 9839:9G8B5 nidx=null parent=9G7QJ]
Sorhoanus kiritshenkoi
 - Sorhoanus kiritshenkoi (Zachvatkin, 1953) [SYNONYM SPECIES 9837:8RNJW nidx=null parent=4YCH5]
 + Sorhoanus kiritshenkoi (Zakhvatkin, 1953) [SYNONYM SPECIES 9839:9G9H5 nidx=null parent=4YCH5]
Sphaerosyllis claparedei
 - Sphaerosyllis claparedei Ehlers, 1864 [ACCEPTED SPECIES 9837:8YWXM nidx=null]
 + Sphaerosyllis claparedei Ehlers, 1864 [ACCEPTED SPECIES 9839:9G4LH nidx=null]
Sphenotrochus cestasensis
 - Sphenotrochus cestasensis Chevalier, 1962 [ACCEPTED SPECIES 9837:8KQR4 nidx=null]
 + Sphenotrochus cestasensis Chevalier, 1961 [ACCEPTED SPECIES 9839:9G9HB nidx=null]
Spilomenina
 - Spilomenina Menke, 1989 [ACCEPTED SUBTRIBE 9837:627WW nidx=null]
 + Spilomenina Menke, 1989 [ACCEPTED SUBTRIBE 9839:9G6ZZ nidx=null]
Spirialis recurvirostra
 - Spirialis recurvirostra Costa A., 1865 [SYNONYM SPECIES 9837:4Z78H nidx=null parent=76RMF]
 + Spirialis recurvirostra A. Costa, 1865 [SYNONYM SPECIES 9839:9G69G nidx=null parent=76RMF]
Spirularia
 - Spirularia den Hartog, 1977 [ACCEPTED ORDER 9837:7NGBP nidx=null]
 + Spirularia den Hartog, 1977 [ACCEPTED ORDER 9839:9FZZH nidx=null]
Sporophila torqueola atriceps
 - Sporophila torqueola atriceps (Lawrence, 1867) [ACCEPTED SUBSPECIES 9837:7L3K2 nidx=null]
 + Sporophila torqueola atriceps (S. F. Baird, 1867) [ACCEPTED SUBSPECIES 9839:9G9PH nidx=null]
Squamopleura miles
 - Squamopleura miles (Carpenter in Pilsbry, 1893) [ACCEPTED SPECIES 9837:6ZFTM nidx=null]
 + Squamopleura miles (Pilsbry, 1893) [ACCEPTED SPECIES 9839:9G69L nidx=null]
Stenometopiellus angorensis
 - Stenometopiellus angorensis Zachvatkin, 1946 [ACCEPTED SPECIES 9837:522XJ nidx=null]
 + Stenometopiellus angorensis Zakhvatkin, 1946 [ACCEPTED SPECIES 9839:9G73Z nidx=null]
Stenometopiellus araxis
 - Stenometopiellus araxis Zachvatkin, 1946 [ACCEPTED SPECIES 9837:522XK nidx=null]
 + Stenometopiellus araxis Zakhvatkin, 1946 [ACCEPTED SPECIES 9839:9G742 nidx=null]
Stenometopiellus iranicus
 - Stenometopiellus iranicus Zachvatkin, 1946 [ACCEPTED SPECIES 9837:522XQ nidx=null]
 + Stenometopiellus iranicus Zakhvatkin, 1946 [ACCEPTED SPECIES 9839:9G743 nidx=null]
Stenonycterini
 - Stenonycterini Nesi, Kadjo, Pourrut, Leroy, Shongo, Cruaud & Hassanin, 2013 [ACCEPTED TRIBE 9837:7NMB6 nidx=null]
 + Stenonycterini Nesi, Kadjo, Pourrut, Leroy, Shongo, Cruaud & Hassanin, 2013 [ACCEPTED TRIBE 9839:9G6ZR nidx=null]
Stenosemus exaratus
 - Stenosemus exaratus (Sars G. O., 1878) [ACCEPTED SPECIES 9837:6ZN8W nidx=null]
 + Stenosemus exaratus (G. O. Sars, 1878) [ACCEPTED SPECIES 9839:9G69Q nidx=null]
Stenothyra lubricella
 - Stenothyra lubricella (Sandberger, 1858) [SYNONYM SPECIES 9837:5263C nidx=null parent=7T7ZS]
 + Stenothyra lubricella (A. Braun, 1851) [SYNONYM SPECIES 9839:9G69R nidx=null parent=7T7ZS]
Stichocotylida
 - Stichocotylida Gibson & Chinabut, 1984 [ACCEPTED ORDER 9837:7NGBQ nidx=null]
 + Stichocotylida Gibson & Chinabut, 1984 [ACCEPTED ORDER 9839:9G25P nidx=null]
Stilifer thomasiae
 - Stilifer thomasiae Sowerby, 1878 [SYNONYM SPECIES 9837:52PRS nidx=null parent=6Y4CK]
 + Stilifer thomasiae G. B. Sowerby II, 1878 [SYNONYM SPECIES 9839:9G69V nidx=null parent=6Y4CK]
Stomopneustoida
 - Stomopneustoida Kroh & Smith, 2010 [ACCEPTED ORDER 9837:7NGBR nidx=null]
 + Stomopneustoida Kroh & Smith, 2010 [ACCEPTED ORDER 9839:9FZZJ nidx=null]
Streptanus okaensis
 - Streptanus okaensis Zachvatkin, 1948 [SYNONYM SPECIES 9837:8RN4X nidx=null parent=8RNLH]
 + Streptanus okaensis Zakhvatkin, 1948 [SYNONYM SPECIES 9839:9G9HG nidx=null parent=8RNLH]
Streptaxis (Artemon) prostrata
 - Streptaxis (Artemon) prostrata Gould in L. Pfeiffer, 1856 [SYNONYM SPECIES 9837:52XJ2 nidx=null parent=6KQPN]
 + Streptaxis (Artemon) prostrata L. Pfeiffer, 1856 [SYNONYM SPECIES 9839:9G6B2 nidx=null parent=9G4WM]
Strophitus undulatus quadriplicatus
 - Strophitus undulatus quadriplicatus (Sowerby, 1870) [SYNONYM SUBSPECIES 9837:5LC3D nidx=null parent=535NZ]
 + Strophitus undulatus quadriplicatus (G. B. Sowerby II, 1870) [SYNONYM SUBSPECIES 9839:9G6T2 nidx=null parent=535NZ]
Strophocheilus (Chiliborus) bridgesii
 - Strophocheilus (Chiliborus) bridgesii (L. Pfeiffer, 1842) [SYNONYM SPECIES 9837:8QGJ6 nidx=null parent=7QN35]
 + Strophocheilus (Chiliborus) bridgesii (L. Pfeiffer, 1843) [SYNONYM SPECIES 9839:9G9HH nidx=null parent=7QN35]
Stylotrochus tenuisculptus
 - Stylotrochus tenuisculptus Seguenza, 1876 [SYNONYM SPECIES 9837:7B2D6 nidx=null parent=6N8S3]
 + Stylotrochus tenuisculptus G. Seguenza, 1876 [SYNONYM SPECIES 9839:7B2CT nidx=null parent=6N8S3]
Surcula similis
 - Surcula similis (Bivona Ant. in Bivona And., 1838) [SYNONYM SPECIES 9837:7T9XH nidx=null parent=6JTX2]
 + Surcula similis (Ant. Bivona, 1838) [SYNONYM SPECIES 9839:9G9HJ nidx=null parent=9G4TM]
Surcula undatiruga
 - Surcula undatiruga (Bivona Ant. in Bivona And., 1838) [SYNONYM SPECIES 9837:7T9XK nidx=null parent=6K68Q]
 + Surcula undatiruga (Ant. Bivona, 1838) [SYNONYM SPECIES 9839:9G9HK nidx=null parent=9G4TN]
Surrepifungium patamakanthini
 - Surrepifungium patamakanthini Gittenberger A. & Gittenberger E., 2005 [ACCEPTED SPECIES 9837:53HFF nidx=null]
 + Surrepifungium patamakanthini A. Gittenberger & E. Gittenberger, 2005 [ACCEPTED SPECIES 9839:9G6CF nidx=null]
Sycodorus hystrix
 - Sycodorus hystrix Haeckel, 1870 [ACCEPTED SPECIES 9837:53LQ8 nidx=null]
 + Sycodorus hystrix Haeckel, 1872 [ACCEPTED SPECIES 9839:9G6CG nidx=null]
Symbiida
 - Symbiida Funch & Kristensen, 1995 [ACCEPTED ORDER 9837:46M nidx=null]
 + Symbiida Funch & Kristensen, 1995 [ACCEPTED ORDER 9839:9G25Q nidx=null]
Syphax
 - Syphax A. Milne-Edwards, 1864 [ACCEPTED GENUS 9837:9F829 nidx=null]
 + Syphax A. Milne-Edwards, 1863 [ACCEPTED GENUS 9839:9G9SZ nidx=null]
Syphax crassus
 - Syphax crassus A. Milne-Edwards, 1864 [ACCEPTED SPECIES 9837:9FY6Z nidx=null]
 + Syphax crassus A. Milne-Edwards, 1863 [ACCEPTED SPECIES 9839:9GDG8 nidx=null]
Syringius rebellatrix
 - Syringius rebellatrix (Dlabola, 1997) [ACCEPTED SPECIES 9837:7BB7M nidx=null]
 + Syringius rebellatrix (Dlabola, 1995) [ACCEPTED SPECIES 9839:9G74S nidx=null]
Syrotrigonia
 - Syrotrigonia Cox, 1952 [ACCEPTED GENUS 9837:7PHWZ nidx=null]
 + Syrotrigonia L. R. Cox, 1952 [ACCEPTED GENUS 9839:9G3Y3 nidx=null]
Syrotrigonia fraasi
 - Syrotrigonia fraasi (Cox, 1952) [ACCEPTED SPECIES 9837:54343 nidx=null]
 + Syrotrigonia fraasi (L. R. Cox, 1952) [ACCEPTED SPECIES 9839:9G6CL nidx=null]
Tamaricella
 - Tamaricella Zachvatkin, 1946 [ACCEPTED GENUS 9837:8HRRX nidx=null]
 + Tamaricella Zakhvatkin, 1946 [ACCEPTED GENUS 9839:9G3PL nidx=null]
Tamaricella astrachanica
 - Tamaricella astrachanica (Zachvatkin, 1953) [ACCEPTED SPECIES 9837:7BJGF nidx=null]
 + Tamaricella astrachanica (Zakhvatkin, 1953) [ACCEPTED SPECIES 9839:9G74Y nidx=null]
Tamaricella ribauti
 - Tamaricella ribauti (Zachvatkin, 1947) [ACCEPTED SPECIES 9837:54M8J nidx=null]
 + Tamaricella ribauti (Zakhvatkin, 1947) [ACCEPTED SPECIES 9839:9G74Z nidx=null]
Tamaricella statices
 - Tamaricella statices (Zachvatkin, 1946) [ACCEPTED SPECIES 9837:54M8L nidx=null]
 + Tamaricella statices (Zakhvatkin, 1953) [ACCEPTED SPECIES 9839:9G752 nidx=null]
Tamasini
 - Tamasini Moulds, 2005 [ACCEPTED TRIBE 9837:8JKG4 nidx=null]
 + Tamasini Moulds, 2005 [ACCEPTED TRIBE 9839:9G6ZS nidx=null]
Tanagra brasiliensis
 - Tanagra brasiliensis Linnaeus, 1766 [SYNONYM SPECIES 9837:54NM9 nidx=null parent=7KTTH]
 + Tanagra brasiliensis Linnaeus, 1767 [SYNONYM SPECIES 9839:9G9HM nidx=null parent=9G82Y]
Tanea mozaica
 - Tanea mozaica (Sowerby, 1883) [ACCEPTED SPECIES 9837:54P38 nidx=null]
 + Tanea mozaica (G. B. Sowerby II, 1883) [ACCEPTED SPECIES 9839:9G6CM nidx=null]
Tangara guttata
 - Tangara guttata (Cabanis, 1850) [ACCEPTED SPECIES 9837:54P5J nidx=null]
 + Tangara guttata (Cabanis, 1851) [SYNONYM SPECIES 9839:9G754 nidx=null parent=9G833]
Tangara guttata guttata
 - Tangara guttata guttata (Cabanis, 1850) [ACCEPTED SUBSPECIES 9837:7L65R nidx=null]
 + Tangara guttata guttata (Cabanis, 1851) [SYNONYM SUBSPECIES 9839:9G82X nidx=null parent=9GBJV]
Tangara heinei
 - Tangara heinei (Cabanis, 1850) [ACCEPTED SPECIES 9837:54P5L nidx=null]
 + Tangara heinei (Cabanis, 1851) [SYNONYM SPECIES 9839:9G755 nidx=null parent=9GCSJ]
Tangara mexicana brasiliensis
 - Tangara mexicana brasiliensis (Linnaeus, 1766) [ACCEPTED SUBSPECIES 9837:7KTTH nidx=null]
 + Tangara mexicana brasiliensis (Linnaeus, 1767) [ACCEPTED SUBSPECIES 9839:9G82Y nidx=null]
Tangara preciosa
 - Tangara preciosa (Cabanis, 1850) [ACCEPTED SPECIES 9837:54P63 nidx=null]
 + Tangara preciosa (Cabanis, 1851) [SYNONYM SPECIES 9839:9G756 nidx=null parent=9GD72]
Tangara vitriolina
 - Tangara vitriolina (Cabanis, 1850) [ACCEPTED SPECIES 9837:54P6F nidx=null]
 + Tangara vitriolina (Cabanis, 1851) [SYNONYM SPECIES 9839:9G757 nidx=null parent=9GCSL]
Tannuella chaoi
 - Tannuella chaoi Chen M., Chen Y. & Zhang S., 1981 [ACCEPTED SPECIES 9837:7TBCQ nidx=null]
 + Tannuella chaoi M.-E. Chen, Y.-Y. Chen & S.-S. Zhang, 1981 [ACCEPTED SPECIES 9839:9G9HN nidx=null]
Tanzanitrigonia stephaninii
 - Tanzanitrigonia stephaninii (Venzo, 1942) [SYNONYM SPECIES 9837:84ZRL nidx=null parent=879XY]
 + Tanzanitrigonia stephaninii [sic] [SYNONYM SPECIES 9839:9G6CP nidx=null parent=879XY]
Taphura nitida
 - Taphura nitida (DeGeer, 1773) [ACCEPTED SPECIES 9837:54SP4 nidx=null]
 + Taphura nitida (De Geer, 1773) [ACCEPTED SPECIES 9839:9G9HP nidx=null]
Tartessidae
 - Tartessidae Distant, 1908 [SYNONYM SUBFAMILY 9837:8RG7Y nidx=null parent=9DMY5]
 + Tartessidae Distant, 1908 [SYNONYM TRIBE 9839:9G7LF nidx=null parent=9G7LH]
Tartessini
 - Tartessini Distant, 1908 [SYNONYM SUBFAMILY 9837:8RG7Z nidx=null parent=9DMY5]
 + Tartessini Distant, 1908 [SYNONYM TRIBE 9839:9G7LG nidx=null parent=9G7LH]
 + Tartessini Distant, 1908 [ACCEPTED TRIBE 9839:9G7LH nidx=null]
Tectura fulva
 - Tectura fulva (Müller O.F., 1776) [SYNONYM SPECIES 9837:553PP nidx=null parent=6N8XN]
 + Tectura fulva (O. F. Müller, 1776) [SYNONYM SPECIES 9839:9G6CX nidx=null parent=6N8XN]
Tegula
 - Tegula Lesson, 1832 [ACCEPTED GENUS 9837:7PJ4Y nidx=null]
 + Tegula Lesson, 1833 [ACCEPTED GENUS 9839:9G3Q2 nidx=null]
Tegula elegans
 - Tegula elegans Lesson, 1832 [SYNONYM SPECIES 9837:554HN nidx=null parent=7BN4K]
 + Tegula elegans Lesson, 1833 [SYNONYM SPECIES 9839:9G6CY nidx=null parent=7BN4K]
Tellimya nivea
 - Tellimya nivea Sars G.O., 1878 [SYNONYM SPECIES 9837:5572X nidx=null parent=5572L]
 + Tellimya nivea G. O. Sars, 1878 [SYNONYM SPECIES 9839:9G6D4 nidx=null parent=5572L]
Tellimya ovalis
 - Tellimya ovalis Sars G.O., 1878 [AMBIGUOUS_SYNONYM SPECIES 9837:5572Z nidx=null parent=5573G]
 + Tellimya ovalis G. O. Sars, 1878 [SYNONYM SPECIES 9839:9G6D5 nidx=null parent=5573G]
Telmessus acutidens
 - Telmessus acutidens (Stimpson, 1848) [ACCEPTED SPECIES 9837:558M3 nidx=null]
 + Telmessus acutidens (Stimpson, 1858) [ACCEPTED SPECIES 9839:9G6D7 nidx=null]
Tenagodus senegalensis
 - Tenagodus senegalensis (Récluz in Mörch, 1860) [SYNONYM SPECIES 9837:7C356 nidx=null parent=7BR4V]
 + Tenagodus senegalensis (Mörch, 1861) [SYNONYM SPECIES 9839:9G6D8 nidx=null parent=7BR4V]
Tenuilapotamon inflatum
 - Tenuilapotamon inflatum Dai & YC Song in Dai, YC Song, MG Li, ZY Chen, PP Wang & Hu, 1985 [SYNONYM SPECIES 9837:7BQFQ nidx=null parent=64G6L]
 + Tenuilapotamon inflatum Dai & Song in Dai, Song, Li, Chen, Wang & Hu, 1984 [SYNONYM SPECIES 9839:9G6D9 nidx=null parent=9G3W6]
Terebra fernandae
 - Terebra fernandae Aubry, 1991 [ACCEPTED SPECIES 9837:7TBZG nidx=null]
 + Terebra fernandae Aubry, 1995 [ACCEPTED SPECIES 9839:9G9HT nidx=null]
Terebra flammea
 - Terebra flammea Lesson, 1832 [AMBIGUOUS_SYNONYM SPECIES 9837:7C3Q6 nidx=null parent=4BFTM]
 + Terebra flammea Lesson, 1833 [SYNONYM SPECIES 9839:9G6DC nidx=null parent=4BFTM]
Terebra taurina
 - Terebra taurina ( [Lightfoot] , 1786) [ACCEPTED SPECIES 9837:9DDQ5 nidx=null]
 + Terebra taurina ( [Lightfoot] , 1786) [ACCEPTED SPECIES 9839:9G6DG nidx=null]
Tettigella albonervosa
 - Tettigella albonervosa (Spinola, 1852) [SYNONYM SPECIES 9837:8JFQ5 nidx=null parent=3KGXJ]
 + Tettigella albonervosa (Blanchard, 1852) [SYNONYM SPECIES 9839:9G9HV nidx=null parent=3KGXJ]
Tettigonia hieroghlyphica
 - Tettigonia hieroghlyphica Say, 1830 [SYNONYM SPECIES 9837:9DPZ7 nidx=null parent=8K2RV]
 + Tettigonia hieroghlyphica (Say, 1830) [SYNONYM SPECIES 9839:9G75X nidx=null parent=8JJP5]
Tettigonia sangvinolenta
 - Tettigonia sangvinolenta DeGeer, 1773 [SYNONYM SPECIES 9837:8JG9X nidx=null parent=8JJKB]
 + Tettigonia sangvinolenta (De Geer, 1773) [SYNONYM SPECIES 9839:9G9HY nidx=null parent=9G9MX]
Teuthirostriidae
 - Teuthirostriidae [ACCEPTED FAMILY 9837:8ZH3M nidx=null]
 + Teuthirostriidae Haszprunar, Wendler, Jöst, Ruthensteiner & Heß, 2022 [ACCEPTED FAMILY 9839:9GCMR nidx=null]
Thalassoalaimus spissus
 - Thalassoalaimus spissus Allgen, 1932 [ACCEPTED SPECIES 9837:89927 nidx=null]
 + Thalassoalaimus spissus (Allgen, 1932) Wieser, 1953 [ACCEPTED SPECIES 9839:9G6DN nidx=null]
Thordisa diuda
 - Thordisa diuda Marcus Er., 1955 [ACCEPTED SPECIES 9837:56KKM nidx=null]
 + Thordisa diuda Er. Marcus, 1955 [ACCEPTED SPECIES 9839:9G6DW nidx=null]
Thraupis glaucocolpa
 - Thraupis glaucocolpa Cabanis, 1850 [ACCEPTED SPECIES 9837:56LM7 nidx=null]
 + Thraupis glaucocolpa Cabanis, 1851 [ACCEPTED SPECIES 9839:9G766 nidx=null]
Thuridilla coerulea
 - Thuridilla coerulea (Kelaart, 1857) [ACCEPTED SPECIES 9837:7BY2J nidx=null]
 + Thuridilla coerulea (Kelaart, 1858) [ACCEPTED SPECIES 9839:9G6DZ nidx=null]
Thyasira goodhalli
 - Thyasira goodhalli (Sowerby J., 1837) [ACCEPTED SPECIES 9837:8YPDK nidx=null]
 + Thyasira goodhalli (J. Sowerby, 1837) [ACCEPTED SPECIES 9839:9GC3D nidx=null]
Thyasira grandis
 - Thyasira grandis (A. E. Verrill & S. Smith [in Verrill] , 1885) [SYNONYM SPECIES 9837:8SXNN nidx=null parent=8SW73]
 + Thyasira grandis (A. E. Verrill & S. Smith, 1885) [SYNONYM SPECIES 9839:56PFB nidx=null parent=K44Y]
Tibicen lyricen
 - Tibicen lyricen (DeGeer, 1773) [SYNONYM SPECIES 9837:8J7MM nidx=null parent=8K2K8]
 + Tibicen lyricen (De Geer, 1773) [SYNONYM SPECIES 9839:9G8DH nidx=null parent=9G8M6]
Tibicen lyricen lyricen
 - Tibicen lyricen lyricen (DeGeer, 1773) [SYNONYM INFRASPECIFIC_NAME 9837:8J9XT nidx=null parent=8K2K8]
 + Tibicen lyricen lyricen (De Geer, 1773) [SYNONYM INFRASPECIFIC_NAME 9839:9G8KZ nidx=null parent=9G8M6]
Tibicen texanus
 - Tibicen texanus (Davis, 1916) [AMBIGUOUS_SYNONYM SPECIES 9837:9F2MN nidx=null parent=35JS3]
 + Tibicen texanus (Davis, 1916) [AMBIGUOUS_SYNONYM SPECIES 9839:9G8DM nidx=null parent=35JS3]
 + Tibicen texanus Metcalf, 1963 [AMBIGUOUS_SYNONYM SPECIES 9839:9G8DN nidx=null parent=3J6QL]
Tichogonia brardii
 - Tichogonia brardii (Brongniart, 1822) [SYNONYM SPECIES 9837:8VQHC nidx=null parent=7QRSL]
 + Tichogonia brardii (Brongniart, 1823) [SYNONYM SPECIES 9839:9G9JP nidx=null parent=7QRSL]
Tihkia karrooensis
 - Tihkia karrooensis (Cox, 1932) [ACCEPTED SPECIES 9837:8V324 nidx=null]
 + Tihkia karrooensis (L. R. Cox, 1932) [ACCEPTED SPECIES 9839:9G9JQ nidx=null]
Titanocarcinus
 - Titanocarcinus A. Milne-Edwards, 1864 [ACCEPTED GENUS 9837:9F4M4 nidx=null]
 + Titanocarcinus A. Milne-Edwards, 1863 [ACCEPTED GENUS 9839:9G98H nidx=null]
Toamasina
 - Toamasina Leevera, Daniels, Soma & Cumberlidge, 2022 [ACCEPTED SUPERTRIBE 9837:9FY7P nidx=null]
 - Toamasina [ACCEPTED GENUS 9837:9FZMD nidx=null]
 + Toamasina Leevera, Daniels, Soma & Cumberlidge, 2022 [ACCEPTED GENUS 9839:9GDG9 nidx=null]
Trachycystis (Xerocystis) uitenhagensis
 - Trachycystis (Xerocystis) uitenhagensis (F. Krauss in L. Pfeiffer, 1846) [SYNONYM SPECIES 9837:57Q3Y nidx=null parent=5CCXN]
 + Trachycystis (Xerocystis) uitenhagensis (L. Pfeiffer, 1846) [SYNONYM SPECIES 9839:9G6FN nidx=null parent=9G6LW]
Trachycystis uitenhagensis
 - Trachycystis uitenhagensis (F. Krauss, in L. Pfeiffer, 1846) [SYNONYM SPECIES 9837:57Q7T nidx=null parent=5CCXN]
 + Trachycystis uitenhagensis (L. Pfeiffer, 1846) [SYNONYM SPECIES 9839:9G6FP nidx=null parent=9G6LW]
Trachysma delicata var. expansa
 - Trachysma delicata var. expansa Sars G.O., 1878 [SYNONYM VARIETY 9837:7N47Q nidx=null parent=57FG3]
 + Trachysma delicata var. expansa G. O. Sars, 1878 [SYNONYM VARIETY 9839:9G6WR nidx=null parent=57FG3]
Trechmannellidae
 - Trechmannellidae Cox, 1934 [ACCEPTED FAMILY 9837:7NLD7 nidx=null]
 + Trechmannellidae L. R. Cox, 1934 [ACCEPTED FAMILY 9839:9G33M nidx=null]
Tremaster
 - Tremaster Verrill, 1880 [ACCEPTED GENUS 9837:7Q4XB nidx=null]
 + Tremaster Verrill, 1879 [ACCEPTED GENUS 9839:9G3QW nidx=null]
Triaenodini
 - Triaenodini Morse, 1981 [ACCEPTED TRIBE 9837:628FV nidx=null]
 + Triaenodini Morse, 1981 [ACCEPTED TRIBE 9839:9G6ZT nidx=null]
Trichocera porcellana
 - Trichocera porcellana White, 1848 [SYNONYM SPECIES 9837:7D2C7 nidx=null parent=6NMMN]
 + Trichocera porcellana Adams & White, 1849 [SYNONYM SPECIES 9839:9G6FX nidx=null parent=6NMMN]
Trichomorpha sculpta
 - Trichomorpha sculpta (Peters, 1864) [ACCEPTED SPECIES 9837:7CQX3 nidx=null]
 + Trichomorpha sculpta (Peters, 1865) [ACCEPTED SPECIES 9839:9G6G3 nidx=null]
Trichomorpha serridens
 - Trichomorpha serridens (Peters, 1864) [ACCEPTED SPECIES 9837:7CR8R nidx=null]
 + Trichomorpha serridens (Peters, 1865) [ACCEPTED SPECIES 9839:9G6G4 nidx=null]
Trichopeltarioidea
 - Trichopeltarioidea [ACCEPTED SUPERFAMILY 9837:5RR nidx=null]
 - Trichopeltarioidea Tavares & Cleva, 2010 [ACCEPTED SUPERFAMILY 9837:7NH32 nidx=null]
 + Trichopeltarioidea Tavares & Cleva, 2010 [ACCEPTED SUPERFAMILY 9839:9G25V nidx=null]
Trichothraupis
 - Trichothraupis Cabanis, 1850 [ACCEPTED GENUS 9837:7ZPT nidx=null]
 + Trichothraupis Cabanis, 1851 [ACCEPTED GENUS 9839:9G3R2 nidx=null]
Tricolia tricolor
 - Tricolia tricolor (Monterosato in Bucquoy, Dautzenberg & Dollfus, 1884) [SYNONYM SPECIES 9837:7D4KJ nidx=null parent=58MSR]
 + Tricolia tricolor (Monterosato, 1880) [SYNONYM SPECIES 9839:9G6G5 nidx=null parent=58MSR]
Tricolia umbilicata
 - Tricolia umbilicata (d'Orbigny, 1840) [SYNONYM SPECIES 9837:58MTD nidx=null parent=3CBPL]
 + Tricolia umbilicata (d'Orbigny, 1842) [SYNONYM SPECIES 9839:9G6G6 nidx=null parent=9G4RZ]
Trierarchus demani
 - Trierarchus demani (Nobili, 1905) [ACCEPTED SPECIES 9837:84HDY nidx=null]
 + Trierarchus demani (Nobili, 1906) [ACCEPTED SPECIES 9839:9G8DZ nidx=null]
Trierarchus sankarankuttyi
 - Trierarchus sankarankuttyi (Crosnier & Thomassin, 1974) [ACCEPTED SPECIES 9837:84HF6 nidx=null]
 + Trierarchus sankarankuttyi (Crosnier & Thomassin, 1975) [ACCEPTED SPECIES 9839:9G9JT nidx=null]
Trimma necopina
 - Trimma necopina (Whitley, 1959) [ACCEPTED SPECIES 9837:99R4K nidx=null]
 + Trimma necopina (Whitley, 1959) [ACCEPTED SPECIES 9839:9G6GF nidx=null]
Triopella incisa
 - Triopella incisa (Sars G. O., 1872) [SYNONYM SPECIES 9837:58WL5 nidx=null parent=64WPV]
 + Triopella incisa (G. O. Sars, 1872) [SYNONYM SPECIES 9839:9G6GJ nidx=null parent=9G3YG]
Triphora aequilirata
 - Triphora aequilirata Boettger, 1901 [SYNONYM SPECIES 9837:7TDRM nidx=null parent=7TDV5]
 + Triphora aequilirata O. Boettger, 1902 [SYNONYM SPECIES 9839:9G9JV nidx=null parent=9G9JX]
Triphora clarae
 - Triphora clarae Boettger, 1901 [ACCEPTED SPECIES 9837:7TDT8 nidx=null]
 + Triphora clarae O. Boettger, 1902 [ACCEPTED SPECIES 9839:9G9JW nidx=null]
Triphora eugeniae
 - Triphora eugeniae Boettger, 1901 [ACCEPTED SPECIES 9837:7TDV5 nidx=null]
 + Triphora eugeniae O. Boettger, 1902 [ACCEPTED SPECIES 9839:9G9JX nidx=null]
Triphora imperatrix
 - Triphora imperatrix Boettger, 1901 [ACCEPTED SPECIES 9837:7TDVQ nidx=null]
 + Triphora imperatrix O. Boettger, 1902 [ACCEPTED SPECIES 9839:9G9JY nidx=null]
Triphora regina
 - Triphora regina Boettger, 1901 [ACCEPTED SPECIES 9837:7TDYH nidx=null]
 + Triphora regina O. Boettger, 1902 [ACCEPTED SPECIES 9839:9G6GK nidx=null]
Trippa intecta
 - Trippa intecta (Kelaart, 1859) [SYNONYM SPECIES 9837:58Z7B nidx=null parent=J7VY]
 + Trippa intecta (Kelaart, 1858) [SYNONYM SPECIES 9839:9G6GN nidx=null parent=9G475]
Tritia pellucida
 - Tritia pellucida (Risso, 1826) [ACCEPTED SPECIES 9837:7D6FT nidx=null]
 + Tritia pellucida (Risso, 1827) [ACCEPTED SPECIES 9839:9G6GX nidx=null]
Tritodynamia dilatatum
 - Tritodynamia dilatatum S. Yang & Sun, 1986 [SYNONYM SPECIES 9837:7Z6FZ nidx=null parent=594M5]
 + Tritodynamia dilatatum Yang & Sun, 1996 [SYNONYM SPECIES 9839:9G6GY nidx=null parent=594M5]
Tritonalia margaritensis
 - Tritonalia margaritensis Dall in M. Smith, 1939 [SYNONYM SPECIES 9837:594Y6 nidx=null parent=3DWHH]
 + Tritonalia margaritensis M. Smith, 1939 [SYNONYM SPECIES 9839:9G6GZ nidx=null parent=3DWHH]
Tritonia acuminata
 - Tritonia acuminata Costa A., 1840 [SYNONYM SPECIES 9837:594YR nidx=null parent=735N6]
 + Tritonia acuminata A. Costa, 1840 [SYNONYM SPECIES 9839:9G6H2 nidx=null parent=735N6]
Tritonidoxa
 - Tritonidoxa Bergh, 1908 [ACCEPTED GENUS 9837:7PJZ9 nidx=null]
 + Tritonidoxa Bergh, 1907 [ACCEPTED GENUS 9839:9G3YD nidx=null]
Tritonidoxa capensis
 - Tritonidoxa capensis Bergh, 1908 [ACCEPTED SPECIES 9837:5956H nidx=null]
 + Tritonidoxa capensis Bergh, 1907 [ACCEPTED SPECIES 9839:9G6H4 nidx=null]
Tritonium ciliatum
 - Tritonium ciliatum Fabricius O., 1780 [SYNONYM SPECIES 9837:5958B nidx=null parent=68SFC]
 + Tritonium ciliatum O. Fabricius, 1780 [SYNONYM SPECIES 9839:9G6H5 nidx=null parent=68SFC]
Tritonium eburneum
 - Tritonium eburneum Sars M., 1851 [SYNONYM SPECIES 9837:5958H nidx=null parent=3V6R6]
 + Tritonium eburneum M. Sars, 1851 [SYNONYM SPECIES 9839:9G6H6 nidx=null parent=3V6R6]
Tritonium fornicatum
 - Tritonium fornicatum Fabricius O., 1780 [SYNONYM SPECIES 9837:5958J nidx=null parent=4742Z]
 + Tritonium fornicatum O. Fabricius, 1780 [SYNONYM SPECIES 9839:9G6H7 nidx=null parent=4742Z]
Tritonium turritum
 - Tritonium turritum Sars M., 1859 [AMBIGUOUS_SYNONYM SPECIES 9837:5959N nidx=null parent=XD3M]
 + Tritonium turritum M. Sars, 1859 [SYNONYM SPECIES 9839:9G6H8 nidx=null parent=XD3M]
Trochomorpha luedersi
 - Trochomorpha luedersi (L. Pfeiffer, 1855) [SYNONYM SPECIES 9837:7TFRN nidx=null parent=7TFRM]
 + Trochomorpha luedersi (L. Pfeiffer, 1859) [SYNONYM SPECIES 9839:9G6HD nidx=null parent=7TFRM]
Trochonanina conicoides
 - Trochonanina conicoides (Metcalfe, 1851) [SYNONYM SPECIES 9837:7TFV2 nidx=null parent=3FTBC]
 + Trochonanina conicoides (Metcalfe, 1852) [SYNONYM SPECIES 9839:9G9K3 nidx=null parent=3FTBC]
Trochus (Clanculus) depressus
 - Trochus (Clanculus) depressus Martens, 1874 [SYNONYM SPECIES 9837:597VC nidx=null parent=VQS6]
 + Trochus (Clanculus) depressus [SYNONYM SPECIES 9839:9GJQ9 nidx=null parent=VQS6]
Trochus (Monilea) masoni
 - Trochus (Monilea) masoni G. Nevill & H. Nevill, 1874 [SYNONYM SPECIES 9837:8SXP7 nidx=null parent=6RNJR]
 + Trochus (Monilea) masoni G. Nevill & H. Nevill, 1874 [SYNONYM SPECIES 9839:7TFZ4 nidx=null parent=7S6NS]
Trochus (Solariella) lusitanicus
 - Trochus (Solariella) lusitanicus Fischer P., 1882 [SYNONYM SPECIES 9837:597WY nidx=null parent=4Y4W3]
 + Trochus (Solariella) lusitanicus P. Fischer, 1882 [SYNONYM SPECIES 9839:9G6HJ nidx=null parent=4Y4W3]
Trochus bilabiatus
 - Trochus bilabiatus Philippi, 1846 [SYNONYM SPECIES 9837:597YV nidx=null parent=343Z4]
 + Trochus bilabiatus Philippi, 1852 [SYNONYM SPECIES 9839:9G6HK nidx=null parent=343Z4]
Trochus borealis
 - Trochus borealis Philippi, 1850 [SYNONYM SPECIES 9837:9BXHM nidx=null parent=3Y42B]
 + Trochus borealis Philippi, 1855 [SYNONYM SPECIES 9839:9GDCX nidx=null parent=3Y42B]
Trochus horridus
 - Trochus horridus Costa O.G., 1861 [AMBIGUOUS_SYNONYM SPECIES 9837:5985Z nidx=null parent=343Z4]
 + Trochus horridus O. G. Costa, 1861 [SYNONYM SPECIES 9839:9G6HP nidx=null parent=343Z4]
Trochus laevigatus
 - Trochus laevigatus Sowerby J., 1817 [AMBIGUOUS_SYNONYM SPECIES 9837:5986T nidx=null parent=PS2Z]
 + Trochus laevigatus J. Sowerby, 1817 [SYNONYM SPECIES 9839:9G6HQ nidx=null parent=PS2Z]
Trochus nobilis
 - Trochus nobilis Philippi, 1848 [SYNONYM SPECIES 9837:7TG5K nidx=null parent=HNRT]
 + Trochus nobilis Philippi, 1849 [SYNONYM SPECIES 9839:9G6HT nidx=null parent=HNRT]
Trochus polaris
 - Trochus polaris Philippi, 1846 [SYNONYM SPECIES 9837:7CVMC nidx=null parent=3Y3ZV]
 + Trochus polaris Philippi, 1852 [SYNONYM SPECIES 9839:9G6HV nidx=null parent=3Y3ZV]
Trochus socius
 - Trochus socius Fischer P., 1895 [SYNONYM SPECIES 9837:598BY nidx=null parent=6NFN2]
 + Trochus socius P. Fischer, 1895 [SYNONYM SPECIES 9839:9G6HW nidx=null parent=6NFN2]
Trophon clavatus
 - Trophon clavatus Sars G.O., 1878 [SYNONYM SPECIES 9837:7CVD7 nidx=null parent=MJXT]
 + Trophon clavatus G. O. Sars, 1878 [SYNONYM SPECIES 9839:9G6J2 nidx=null parent=MJXT]
Trophon muricatus var. aspera
 - Trophon muricatus var. aspera Monterosato in Bucquoy & Dautzenberg, 1882 [SYNONYM VARIETY 9837:5RXS7 nidx=null parent=59B2L]
 + Trophon muricatus var. aspera Bucquoy, Dautzenberg & Dollfus, 1882 [SYNONYM VARIETY 9839:9G6WT nidx=null parent=59B2L]
Trophon muricatus var. major
 - Trophon muricatus var. major Monterosato in Bucquoy & Dautzenberg, 1882 [SYNONYM VARIETY 9837:5RXS9 nidx=null parent=59B2L]
 + Trophon muricatus var. major Monterosato, 1878 [SYNONYM VARIETY 9839:9G6T7 nidx=null parent=59B2L]
Trophon muricatus var. minor
 - Trophon muricatus var. minor Monterosato in Bucquoy & Dautzenberg, 1882 [SYNONYM VARIETY 9837:7MRFV nidx=null parent=59B2L]
 + Trophon muricatus var. minor Monterosato, 1878 [SYNONYM VARIETY 9839:9G6WV nidx=null parent=59B2L]
Tuakamara aphila
 - Tuakamara aphila Webb, 1980 [SYNONYM SPECIES 9837:59HPW nidx=null parent=3YF57]
 + Tuakamara aphila Webb, 1980 [ACCEPTED SPECIES 9839:59HPX nidx=null]
Tuba sculpta
 - Tuba sculpta (Sowerby J. de C., 1823) [ACCEPTED SPECIES 9837:8YPHK nidx=null]
 + Tuba sculpta (J. de C. Sowerby, 1823) [ACCEPTED SPECIES 9839:9GC3J nidx=null]
Tubothalamea
 - Tubothalamea Pawlowski, Holzman & Tyszka, 2013 [ACCEPTED CLASS 9837:7NFVR nidx=null]
 + Tubothalamea Pawlowski, Holzman & Tyszka, 2013 [ACCEPTED CLASS 9839:9FZZC nidx=null]
Turbinaria cyathiformis var. grandis
 - Turbinaria cyathiformis var. grandis Chevalier, 1962 [ACCEPTED VARIETY 9837:5RY7J nidx=null]
 + Turbinaria cyathiformis var. grandis Chevalier, 1961 [SYNONYM VARIETY 9839:9G6WW nidx=null parent=59MPJ]
Turbinaria cyathiformis var. lamelliformis
 - Turbinaria cyathiformis var. lamelliformis Chevalier, 1962 [SYNONYM VARIETY 9837:857VB nidx=null parent=59MPJ]
 + Turbinaria cyathiformis var. lamelliformis Chevalier, 1961 [SYNONYM VARIETY 9839:5RY7K nidx=null parent=59MPJ]
Turbinaria cyathiformis var. reussi
 - Turbinaria cyathiformis var. reussi Chevalier, 1962 [ACCEPTED VARIETY 9837:5RY7L nidx=null]
 + Turbinaria cyathiformis var. reussi Chevalier, 1961 [SYNONYM VARIETY 9839:9G6WX nidx=null parent=59MPJ]
Turbinolia antiquata
 - Turbinolia antiquata Risso, 1826 [SYNONYM SPECIES 9837:8K47V nidx=null parent=863FT]
 + Turbinolia antiquata Risso, 1827 [SYNONYM SPECIES 9839:9G9K6 nidx=null parent=863FT]
Turbinolia corniformis
 - Turbinolia corniformis Risso, 1826 [SYNONYM SPECIES 9837:9B7DK nidx=null parent=863FT]
 + Turbinolia corniformis Risso, 1827 [SYNONYM SPECIES 9839:9GB7F nidx=null parent=863FT]
Turbinolia cyathus
 - Turbinolia cyathus Risso, 1826 [SYNONYM SPECIES 9837:8K47W nidx=null parent=863FT]
 + Turbinolia cyathus Risso, 1827 [SYNONYM SPECIES 9839:9G9K7 nidx=null parent=863FT]
Turbo albulus
 - Turbo albulus Fabricius O., 1780 [SYNONYM SPECIES 9837:59MY2 nidx=null parent=6QZR5]
 + Turbo albulus O. Fabricius, 1780 [SYNONYM SPECIES 9839:9G6J9 nidx=null parent=6QZR5]
Turbo planorbis
 - Turbo planorbis Fabricius O., 1780 [SYNONYM SPECIES 9837:59N6T nidx=null parent=6Z3YK]
 + Turbo planorbis O. Fabricius, 1780 [SYNONYM SPECIES 9839:9G6JB nidx=null parent=6Z3YK]
Turbo sculptus
 - Turbo sculptus Sowerby J. de C., 1823 [SYNONYM SPECIES 9837:8ZGCT nidx=null parent=8YPHK]
 + Turbo sculptus J. de C. Sowerby, 1823 [SYNONYM SPECIES 9839:9GCMK nidx=null parent=9GC3J]
Turbonilla acosta
 - Turbonilla acosta Bartsch, 1919 [SYNONYM SPECIES 9837:59ND2 nidx=null parent=34WJZ]
 + Turbonilla acosta Bartsch, 1929 [SYNONYM SPECIES 9839:9G6JD nidx=null parent=34WJZ]
Turbonilla magnifica
 - Turbonilla magnifica Seguenza G., 1880 [ACCEPTED SPECIES 9837:59NXW nidx=null]
 + Turbonilla magnifica G. Seguenza, 1880 [ACCEPTED SPECIES 9839:9G6JJ nidx=null]
Turbonilla petri
 - Turbonilla petri Bartsch, 1919 [SYNONYM SPECIES 9837:59P5J nidx=null parent=34WJZ]
 + Turbonilla petri Bartsch, 1929 [SYNONYM SPECIES 9839:9G6JL nidx=null parent=34WJZ]
Turbonilla pumila
 - Turbonilla pumila Seguenza G., 1876 [ACCEPTED SPECIES 9837:59P76 nidx=null]
 + Turbonilla pumila G. Seguenza, 1876 [ACCEPTED SPECIES 9839:9G6JM nidx=null]
Turcica monilifera
 - Turcica monilifera A. Adams, 1855 [ACCEPTED SPECIES 9837:59PGN nidx=null]
 + Turcica monilifera A. Adams, 1854 [ACCEPTED SPECIES 9839:9G6JQ nidx=null]
Tympanotonos (Eotympanotonus) funatus
 - Tympanotonos (Eotympanotonus) funatus (Sowerby J., 1814) [SYNONYM SPECIES 9837:8ZGRQ nidx=null parent=8YMC4]
 + Tympanotonos (Eotympanotonus) funatus (J. Sowerby, 1814) [SYNONYM SPECIES 9839:9GCMN nidx=null parent=9GBXW]
Typhlocyba (Edwardsiana) tshinari
 - Typhlocyba (Edwardsiana) tshinari (Zachvatkin, 1947) [SYNONYM SPECIES 9837:8K24T nidx=null parent=38TKZ]
 + Typhlocyba (Edwardsiana) tshinari (Zakhvatkin, 1947) [SYNONYM SPECIES 9839:9G9KC nidx=null parent=9G54L]
Typhlocyba (Ribautiana) ognevi
 - Typhlocyba (Ribautiana) ognevi Zachvatkin, 1948 [SYNONYM SPECIES 9837:59VMT nidx=null parent=4SY4L]
 + Typhlocyba (Ribautiana) ognevi Zakhvatkin, 1948 [SYNONYM SPECIES 9839:9G77W nidx=null parent=9G6XK]
Typhlocyba ishidai
 - Typhlocyba ishidai Ishihara, 1953 [SYNONYM SPECIES 9837:7DCPK nidx=null parent=38THV]
 + Typhlocyba ishidai Matsumura, 1932 [SYNONYM SPECIES 9839:8JHCG nidx=null parent=8J3BN]
 + Typhlocyba ishidai Matsumura, 1931 [SYNONYM SPECIES 9839:9G77N nidx=null parent=8J3BN]
Typhlocyba menzbieri
 - Typhlocyba menzbieri (Zachvatkin, 1948) [SYNONYM SPECIES 9837:8RVHH nidx=null parent=38TJD]
 + Typhlocyba menzbieri (Zakhvatkin, 1948) [SYNONYM SPECIES 9839:9G9KD nidx=null parent=9G54H]
Typhlocyba severtsovi
 - Typhlocyba severtsovi (Zachvatkin, 1948) [SYNONYM SPECIES 9837:8RV83 nidx=null parent=38TKJ]
 + Typhlocyba severtsovi (Zakhvatkin, 1948) [SYNONYM SPECIES 9839:9G9KF nidx=null parent=9G54K]
Umbonium giganteum
 - Umbonium giganteum (Lesson, 1831) [ACCEPTED SPECIES 9837:7DGHY nidx=null]
 + Umbonium giganteum (Lesson, 1832) [ACCEPTED SPECIES 9839:9G6JY nidx=null]
Unio caffer
 - Unio caffer F. Krauss, 1848 [ACCEPTED SPECIES 9837:7TJHH nidx=null]
 + Unio caffer Krauss, 1848 [ACCEPTED SPECIES 9839:7DJG9 nidx=null]
Unio karrooensis
 - Unio karrooensis Cox, 1932 [SYNONYM SPECIES 9837:8V2ZM nidx=null parent=8V324]
 + Unio karrooensis L. R. Cox, 1932 [SYNONYM SPECIES 9839:9G9KN nidx=null parent=9G9JQ]
Unitas suturalis
 - Unitas suturalis (Sowerby G. B., 1821) [ACCEPTED SPECIES 9837:8YPLB nidx=null]
 + Unitas suturalis (G. B. Sowerby I, 1822) [ACCEPTED SPECIES 9839:9GC49 nidx=null]
Urechis chilensis
 - Urechis chilensis (M. Müller, 1852) [ACCEPTED SPECIES 9837:7DQ9R nidx=null]
 + Urechis chilensis (Diesing, 1859) [ACCEPTED SPECIES 9839:9G4LN nidx=null]
Urnalana haematosticta
 - Urnalana haematosticta (Adams in Belcher, 1848) [ACCEPTED SPECIES 9837:7DRWT nidx=null]
 + Urnalana haematosticta (Adams, 1847) [ACCEPTED SPECIES 9839:9G6K5 nidx=null]
Urosyca
 - Urosyca Gabb, 1869 [ACCEPTED GENUS 9837:7PKJY nidx=null]
 + Urosyca Gabb, 1868 [ACCEPTED GENUS 9839:9G3YP nidx=null]
Utella hystrix
 - Utella hystrix (Haeckel, 1870) [SYNONYM SPECIES 9837:7F3WC nidx=null parent=53LQ8]
 + Utella hystrix (Haeckel, 1872) [SYNONYM SPECIES 9839:9G6K6 nidx=null parent=9G6CG]
Vampyromorpha
 - Vampyromorpha Robson, 1929 [ACCEPTED ORDER 9837:7NGCC nidx=null]
 + Vampyromorpha G. C. Robson, 1929 [ACCEPTED ORDER 9839:622VD nidx=null]
Venus foveolata
 - Venus foveolata Sowerby, 1853 sensu Reeve, 1863 [SYNONYM SPECIES 9837:7FMRS nidx=null parent=7FMMP]
 + Venus foveolata G. B. Sowerby II, 1853 [SYNONYM SPECIES 9839:9G6KZ nidx=null parent=7FMMP]
Verticordia abyssicola
 - Verticordia abyssicola (Sars G. O., 1872) [SYNONYM SPECIES 9837:5B92Q nidx=null parent=3WSWC]
 + Verticordia abyssicola (G. O. Sars, 1872) [SYNONYM SPECIES 9839:9G6L8 nidx=null parent=9G5B7]
Verticordia trapezoidea
 - Verticordia trapezoidea Seguenza G., 1876 [SYNONYM SPECIES 9837:5B98C nidx=null parent=6KZ3Y]
 + Verticordia trapezoidea G. Seguenza, 1876 [SYNONYM SPECIES 9839:9G6LD nidx=null parent=6KZ3Y]
Vertigo californica cupressicola
 - Vertigo californica cupressicola Sterki in Pilsbry, 1916 [SYNONYM SUBSPECIES 9837:7V44M nidx=null parent=7TLJH]
 + Vertigo californica cupressicola Sterki, 1919 [SYNONYM SUBSPECIES 9839:9G6T8 nidx=null parent=7TLJH]
Vicinocerithium concavum
 - Vicinocerithium concavum (Sowerby J., 1822) [ACCEPTED SPECIES 9837:8YPNJ nidx=null]
 + Vicinocerithium concavum (J. Sowerby, 1822) [ACCEPTED SPECIES 9839:9GC4B nidx=null]
Vietanna
 - Vietanna [ACCEPTED GENUS 9837:8RVFL nidx=null]
 + Vietanna Lee & Pham, 2021 [ACCEPTED GENUS 9839:9G7YG nidx=null]
Vittagaeana
 - Vittagaeana [ACCEPTED GENUS 9837:8RV9R nidx=null]
 + Vittagaeana Moulds, Sarkar, Lee & Marshall, 2021 [ACCEPTED GENUS 9839:9G7YH nidx=null]
Vituratella termitophila
 - Vituratella termitophila (Champion, 1927) [ACCEPTED SPECIES 9837:5BMZ5 nidx=null]
 + Vituratella termitophila (Champion, 1927) [ACCEPTED SPECIES 9839:9G78X nidx=null]
Viviparus chinensis hainanensis
 - Viviparus chinensis hainanensis (Möllendorff in Kobelt, 1909) [SYNONYM SUBSPECIES 9837:7V49Q nidx=null parent=VFNH]
 + Viviparus chinensis hainanensis (Kobelt, 1909) [SYNONYM SUBSPECIES 9839:9G6T9 nidx=null parent=VFNH]
Volatinia jacarina peruviensis
 - Volatinia jacarina peruviensis (Peale, 1848) [ACCEPTED SUBSPECIES 9837:7L6GR nidx=null]
 + Volatinia jacarina peruviensis (Peale, 1849) [ACCEPTED SUBSPECIES 9839:9G83K nidx=null]
Voluta anna
 - Voluta anna Lesson, 1835 [SYNONYM SPECIES 9837:5BPLS nidx=null parent=3WTHK]
 + Voluta anna Lesson, 1833 [SYNONYM SPECIES 9839:9G6LN nidx=null parent=9G5B9]
Voluta scalaris
 - Voluta scalaris Sowerby J. de C., 1843 [SYNONYM SPECIES 9837:8ZFMW nidx=null parent=8YL9P]
 + Voluta scalaris J. de C. Sowerby, 1843 [SYNONYM SPECIES 9839:9GCMF nidx=null parent=9GBWG]
Volvaria acutiuscula
 - Volvaria acutiuscula Sowerby G.B., 1821 [ACCEPTED SPECIES 9837:8YPPG nidx=null]
 + Volvaria acutiuscula G. B. Sowerby I, 1821 [ACCEPTED SPECIES 9839:9GC4C nidx=null]
Winterschmidtiidae
 - Winterschmidtiidae [ACCEPTED FAMILY 9837:HWF nidx=null]
 + Winterschmidtiidae Oudemans, 1923 [ACCEPTED FAMILY 9839:9G2HB nidx=null]
Xenacoelomorpha
 - Xenacoelomorpha Philippe, Brinkmann, Copley, Moroz, Nakano, Poustka, Wallberg, Peterson & Telford, 2011 [ACCEPTED PHYLUM 9837:7NF2K nidx=null]
 + Xenacoelomorpha Philippe, Brinkmann, Copley, Moroz, Nakano, Poustka, Wallberg, Peterson & Telford, 2011 [ACCEPTED PHYLUM 9839:9FZZ8 nidx=null]
Xenocarcinus longicornis
 - Xenocarcinus longicornis Dai & SL Chen, 1993 [ACCEPTED SPECIES 9837:5C9K6 nidx=null]
 + Xenocarcinus longicornis Dai & Chen, 1992 [ACCEPTED SPECIES 9839:9G6LQ nidx=null]
Xenuroturris emmae
 - Xenuroturris emmae Bozzetti, 1994 [ACCEPTED SPECIES 9837:5CBY3 nidx=null]
 + Xenuroturris emmae Bozzetti, 1993 [ACCEPTED SPECIES 9839:9G6LT nidx=null]
Xerocerastus nitens
 - Xerocerastus nitens (Denger, 1922) [SYNONYM SPECIES 9837:5CCJJ nidx=null parent=72PCH]
 + Xerocerastus nitens (Degner, 1922) [SYNONYM SPECIES 9839:9G6LV nidx=null parent=72PCH]
Xerocystis uitenhagensis
 - Xerocystis uitenhagensis (F. Krauss in L. Pfeiffer, 1846) [ACCEPTED SPECIES 9837:5CCXN nidx=null]
 + Xerocystis uitenhagensis (L. Pfeiffer, 1846) [ACCEPTED SPECIES 9839:9G6LW nidx=null]
Xuthopona
 - Xuthopona [ACCEPTED GENUS 9837:8RQXZ nidx=null]
 + Xuthopona Freytag, 2018 [ACCEPTED GENUS 9839:9G7YL nidx=null]
Yinformibus
 - Yinformibus [ACCEPTED GENUS 9837:8RQLB nidx=null]
 + Yinformibus Du, Liang & Dai, 2019 [ACCEPTED GENUS 9839:9G73X nidx=null]
Yoldia micrometrica
 - Yoldia micrometrica Seguenza G., 1877 [SYNONYM SPECIES 9837:7TNP6 nidx=null parent=7TNPQ]
 + Yoldia micrometrica G. Seguenza, 1877 [SYNONYM SPECIES 9839:9G6LZ nidx=null parent=7TNPQ]
Zafra pumila
 - Zafra pumila (Dunker, 1858) [ACCEPTED SPECIES 9837:7GBRP nidx=null]
 + Zafra pumila (Dunker, 1860) [ACCEPTED SPECIES 9839:9G6M2 nidx=null]
Zizyphinus folini
 - Zizyphinus folini Fischer P., 1882 [SYNONYM SPECIES 9837:5D65K nidx=null parent=PWBD]
 + Zizyphinus folini P. Fischer, 1882 [SYNONYM SPECIES 9839:9G6MF nidx=null parent=PWBD]
Zonites cyprius
 - Zonites cyprius (L. Pfeiffer, 1846) [SYNONYM SPECIES 9837:8M4XC nidx=null parent=8M36B]
 + Zonites cyprius (L. Pfeiffer, 1847) [SYNONYM SPECIES 9839:9G9KV nidx=null parent=8M36B]
Zonites verticillus var. euroa
 - Zonites verticillus var. euroa Klimakowicz, 1899 [SYNONYM VARIETY 9837:872DR nidx=null parent=84SPW]
 + Zonites verticillus var. euroa M. Kimakowicz, 1899 [SYNONYM VARIETY 9839:9G9QH nidx=null parent=84SPW]
Zygina unipunctata
 - Zygina unipunctata Ramakrishnan & Menon, 1974 [SYNONYM SPECIES 9837:7GHGN nidx=null parent=39LFY]
 + Zygina unipunctata (Dlabola, 1957) [SYNONYM SPECIES 9839:9G7C4 nidx=null parent=6NPL5]
Zyginidia (Anatolidia)
 - Zyginidia (Anatolidia) Zachvatkin, 1937 [ACCEPTED SUBGENUS 9837:8JMZC nidx=null]
 + Zyginidia (Anatolidia) Zakhvatkin, 1937 [SYNONYM SUBGENUS 9839:9G82S nidx=null parent=8JMZB]
Zyginidia (Arboridia)
 - Zyginidia (Arboridia) Zachvatkin, 1946 [SYNONYM SUBGENUS 9837:8KJ89 nidx=null parent=8HD6C]
 - Zyginidia (Arboridia) Zachvatkin, 1946 [SYNONYM SUBGENUS 9837:8KJ8B nidx=null parent=8JMFS]
 + Zyginidia (Arboridia) Zakhvatkin, 1946 [SYNONYM SUBGENUS 9839:9G2VB nidx=null parent=9G2VD]
 + Zyginidia (Arboridia) Zakhvatkin, 1946 [SYNONYM SUBGENUS 9839:9G2VF nidx=null parent=9G2V9]
Zyginidia (Asianidia)
 - Zyginidia (Asianidia) Zachvatkin, 1946 [SYNONYM SUBGENUS 9837:8KJXQ nidx=null parent=8HDBV]
 + Zyginidia (Asianidia) Zakhvatkin, 1946 [SYNONYM SUBGENUS 9839:9G222 nidx=null parent=9FZZZ]
Zyginidia (Fruitioidia)
 - Zyginidia (Fruitioidia) Zachvatkin, 1946 [SYNONYM SUBGENUS 9837:8KM56 nidx=null parent=8JMP4]
 + Zyginidia (Fruitioidia) Zakhvatkin, 1946 [SYNONYM SUBGENUS 9839:9G82T nidx=null parent=9G38F]
Zyginidia (Frutioidia)
 - Zyginidia (Frutioidia) Zachvatkin, 1946 [SYNONYM SUBGENUS 9837:8KJ55 nidx=null parent=8JMP4]
 - Zyginidia (Frutioidia) Zachvatkin, 1946 [SYNONYM SUBGENUS 9837:8KJ56 nidx=null parent=8HJVD]
 + Zyginidia (Frutioidia) Zakhvatkin, 1946 [SYNONYM SUBGENUS 9839:9G38D nidx=null parent=9G38F]
 + Zyginidia (Frutioidia) Zakhvatkin, 1946 [SYNONYM SUBGENUS 9839:9G38G nidx=null parent=9G38C]
Zyginidia (Zyginidia) eremita
 - Zyginidia (Zyginidia) eremita Zachvatkin, 1953 [ACCEPTED SPECIES 9837:7GHLS nidx=null]
 + Zyginidia (Zyginidia) eremita Zakhvatkin, 1953 [SYNONYM SPECIES 9839:9G7CD nidx=null parent=9G7CC]
Zyginidia (Zyginidia) koeleriae
 - Zyginidia (Zyginidia) koeleriae Zachvatkin, 1948 [SYNONYM SPECIES 9837:7GHLG nidx=null parent=7GHC8]
 + Zyginidia (Zyginidia) koeleriae Zakhvatkin, 1948 [SYNONYM SPECIES 9839:9G7CH nidx=null parent=9G7CM]
Zyginidia (Zyginidia) sohrab
 - Zyginidia (Zyginidia) sohrab Zachvatkin, 1947 [ACCEPTED SPECIES 9837:7GHBW nidx=null]
 + Zyginidia (Zyginidia) sohrab Zakhvatkin, 1947 [SYNONYM SPECIES 9839:9G7CL nidx=null parent=9G7CK]
Zyginidia coacta caucasica
 - Zyginidia coacta caucasica Zachvatkin, 1953 [SYNONYM SUBSPECIES 9837:5LVRL nidx=null parent=7GHLS]
 + Zyginidia coacta caucasica Zakhvatkin, 1953 [SYNONYM SUBSPECIES 9839:9G83R nidx=null parent=9G7CC]
Zyginidia sohrab
 - Zyginidia sohrab Zachvatkin, 1947 [SYNONYM SPECIES 9837:8JHXC nidx=null parent=7GHBW]
 + Zyginidia sohrab Zakhvatkin, 1947 [ACCEPTED SPECIES 9839:9G7CK nidx=null]