taxonID	type	description	language	source
6CE87C040F9A5BEEA1858F6652DE9309.taxon	description	Figures 4, 5, 6	en	Sun, Yue, Yu, Lei, Li, Xinzheng (2021): A new species and a new species record of Orbiniidae Hartman, 1942 (Annelida, Polychaeta) from China. ZooKeys 1068: 1-11, DOI: http://dx.doi.org/10.3897/zookeys.1068.71925, URL: http://dx.doi.org/10.3897/zookeys.1068.71925
6CE87C040F9A5BEEA1858F6652DE9309.taxon	materials_examined	Material examined. YCTU 000006: ECS, Sta. 3100 - 8, 31 ° 00 ' N, 126 ° 00 ' E, 51 m, soft mud substrate, Jun. 2014. YCTU 000007: ECS, Sta. I 3, 33 ° 00 ' N, 123 ° 00 ' E, 34 m, soft mud substrate, 20 Sep. 2015. MBM 009966: ECS, Sta. 4134, 29 ° 30 ' N, 123 ° 00 ' E, 50 m, soft mud substrate, 20 Jan. 1959. MBM 023276: ECS, Sta. 4007, 33 ° 30 ' N, 122 ° 30 ' E, 37 m, soft mud substrate, 13 Apr. 1959.	en	Sun, Yue, Yu, Lei, Li, Xinzheng (2021): A new species and a new species record of Orbiniidae Hartman, 1942 (Annelida, Polychaeta) from China. ZooKeys 1068: 1-11, DOI: http://dx.doi.org/10.3897/zookeys.1068.71925, URL: http://dx.doi.org/10.3897/zookeys.1068.71925
6CE87C040F9A5BEEA1858F6652DE9309.taxon	description	Description. All specimens incomplete, posterior end missing. Body elongate, about same width throughout; thorax depressed, abdominal chaetigers cylindrical. Prostomium short, conical, tapering to rounded tip; eyepots absent; nuchal organs narrow groove at junction with peristomium. Peristomium an asetigerous segment, distinctly separated from prostomium and chaetiger 1; mouth with anterior oral lip arising from posterior margin of peristomium, posterior oral lip from anterior margin of chaetiger 2. Proboscis everted, consisting of 2 large, inflated lobes. Thorax with 16 chaetigers, divided into anterior and posterior sections: anterior thorax with 12 chaetigers, posterior thorax with modified spines from chaetiger 13 continuing over 4 chaetigers. Intersegmental annulations first present from chaetiger 1, well developed (Fig. 4 A). Both thoracic notopodia and neuropodia with fringed postchaetal lobes; notopodium half as broad as the neuropodium, broadly palmate (Figs 4 A, 5 A). Notopodia with single conical postchaetal lobe from chaetiger 1, increasing gradually to about 6 lobes on posterior thoracic chaetigers; postchaetal lobes equivalent in size and shape on anterior chaetigers, with inner lobe separate and becoming longer than the outer ones on the posterior chaetigers (Fig. 4 A, C). Abdominal notopodial postchaetal lobe arising from narrow base, broadly triangular (Fig. 4 B). Thoracic neuropodia thick, elongate, strictly lateral, bearing numerous subuluncini and capillaries (Fig. 4 A, C). Neuropodium with 1 - 3 conical postchaetal lobes from chaetiger 1, increasing gradually to about 15 lobes on chaetigers 9 (Figs 4 A, C, 6 A). Subpodial lobes or stomach papillae present on chaetiger 17 - 19, numbering 2 or 3. Abdominal neuropodia bilobed, with inner lobe blunted, outer lobe cirriform (Fig. 4 B). First abdominal chaetiger with 3 - 6 extra lobes or ventral cirri ventral to neuropodium, then reduced to a single cirrus on subsequent chaetigers (Fig. 4 B). Interramal cirrus absent. Branchiae from chaetiger 5, each anterior branchia broad, tapering to narrow rounded tip (Fig. 4 C), subsequent branchiae narrower and longer, leaflike and ciliated (Fig. 4 B). Thoracic notopodia with fascicles of crenulated capillaries (Figs 5 A, 6 A, B). Abdominal notopodia with fewer long, thin capillaries, 3 or 4 furcate chaetae and 4 - 8 imbedded aciculae (Fig. 4 B). Anterior thoracic neuropodia with numerous yellow subuluncini and crenulated capillaries (Figs 5 B, 6 A). Subuluncini arranged in dense phalanx, with anterior ranks strongly curved, much shorter than posterior ranks (Fig. 5 A, B). Subuluncini tapering to narrow pointed tip, covered with sheath, shaft with transverse rows of minute ribs or barbs (Fig. 5 C). Posterior thoracic neuropodia with 4 or 5 modified spines, several subuluncini and crenulated capillaries ventral to the modified spines (Fig. 6 B). Modified spines large, superior one projecting from neuropodium, with glandular pouch (Figs 4 D, 5 D, 6 B, C). Abdominal neurochaetae including thin capillaries and 1 - 3 aciculae (Fig. 5 B). Pygidium not observed.	en	Sun, Yue, Yu, Lei, Li, Xinzheng (2021): A new species and a new species record of Orbiniidae Hartman, 1942 (Annelida, Polychaeta) from China. ZooKeys 1068: 1-11, DOI: http://dx.doi.org/10.3897/zookeys.1068.71925, URL: http://dx.doi.org/10.3897/zookeys.1068.71925
6CE87C040F9A5BEEA1858F6652DE9309.taxon	distribution	Distribution. East China Sea (China); Suruga Bay, Miyagi Prefecture (Japan).	en	Sun, Yue, Yu, Lei, Li, Xinzheng (2021): A new species and a new species record of Orbiniidae Hartman, 1942 (Annelida, Polychaeta) from China. ZooKeys 1068: 1-11, DOI: http://dx.doi.org/10.3897/zookeys.1068.71925, URL: http://dx.doi.org/10.3897/zookeys.1068.71925
A2E7DB986B785109BE12E30E45C24BEC.taxon	description	Figures 1, 2, 3	en	Sun, Yue, Yu, Lei, Li, Xinzheng (2021): A new species and a new species record of Orbiniidae Hartman, 1942 (Annelida, Polychaeta) from China. ZooKeys 1068: 1-11, DOI: http://dx.doi.org/10.3897/zookeys.1068.71925, URL: http://dx.doi.org/10.3897/zookeys.1068.71925
A2E7DB986B785109BE12E30E45C24BEC.taxon	materials_examined	Material examined. Holotype: MBM 286984: nYS, Sta. 3875 - 04, 38 ° 45 ' N, 123 ° 30 ' E, 64 m, 16 Dec. 2015. Paratype: MBM 286985: nYS, Sta. 16, 39 ° 07 ' N, 122 ° 54 ' E, 31 m, 18 Dec. 2016. MBM 286986: nYS, Sta. C 3, 39 ° 00 ' N, 122 ° 55 ' E, 45 meters, 18 Dec. 2016. Sta. MBM 286987: nYS, Sta. A 1, 39 ° 05 ' N, 122 ° 35 ' E, 36 m, 18 Dec. 2016. MBM 023255: nYS, Sta. 2049, 122 ° 45 ' N, 38 ° 09 ' E, 51 m, coll. Mu Chen. 11 Jul. 1959.	en	Sun, Yue, Yu, Lei, Li, Xinzheng (2021): A new species and a new species record of Orbiniidae Hartman, 1942 (Annelida, Polychaeta) from China. ZooKeys 1068: 1-11, DOI: http://dx.doi.org/10.3897/zookeys.1068.71925, URL: http://dx.doi.org/10.3897/zookeys.1068.71925
A2E7DB986B785109BE12E30E45C24BEC.taxon	materials_examined	Additional material. MBM 023221: nYS, Sta. 2056, 38 ° 30 ' N, 123 ° 30 ' E, 63 m, Mu Chen. 15 Apr. 1959. MBM 009975: nYS, Sta. 2057, 38 ° 00 ' N, 123 ° 30 ' E, 70.5 m, coll. Yuheng Cui. 1 Oct. 1958. YCTU 000004: nYS, Sta. A 3, 39 ° 00 ' N, 122 ° 35 ' E, 35 m, 18 Dec. 2016. YCTU 000005: nYS, Sta. 48, 39 ° 16 ' N, 123 ° 18 ' E, 37 m, 18 Dec. 2016.	en	Sun, Yue, Yu, Lei, Li, Xinzheng (2021): A new species and a new species record of Orbiniidae Hartman, 1942 (Annelida, Polychaeta) from China. ZooKeys 1068: 1-11, DOI: http://dx.doi.org/10.3897/zookeys.1068.71925, URL: http://dx.doi.org/10.3897/zookeys.1068.71925
A2E7DB986B785109BE12E30E45C24BEC.taxon	description	Description. All specimens incomplete, posterior end missing, holotype with 60 chaetigers, 34 mm long and 5 mm wide. Body elongate, about same width throughout; thorax depressed, abdomen cylindrical. Prostomium short, conical, tapering to rounded tip; eyepots absent, nuchal organs narrow groove at junction with peristomium (Fig. 1). Peristomium a narrow asetigerous segment, distinctly separated from prostomium and chaetiger 1; mouth with anterior oral lip arising from posterior margin of peristomium, posterior oral lip from anterior margin of chaetiger 2. Holotype with proboscis everted, consisting of two large, inflated lobes (Fig. 1). Holotype with 21 thoracic chaetigers, divided into anterior and posterior sections: anterior thorax with 13 chaetigers (Figs 1, 2 A), posterior thorax with modified spines beginning on chaetiger 14 continuing over 8 chaetigers. Intersegmental annulations first present from chaetiger 1, well developed (Figs 1, 2 A). Thoracic notopodial postchaetal lobe arising from narrow base, broadly triangular, narrowing apically (Fig. 2 B), becoming long and narrow in abdominal chaetigers (Fig. 2 C, D). Thoracic neuropodia thick, elongate, fringed, bearing rows of uncini and several capillaries. First chaetiger with 2 rounded postchaetal lobe, increasing to 13 - 14 on middle thoracic chaetigers (Fig. 2 A), then decreasing to 6 or 7 on last thoracic chaetigers. Subpodial lobes or stomach papillae from chaetiger 12, numbering 1 at first, then extending to ventral midline on chaetigers 18 - 25, then abruptly absent (Figs 1, 2 A). Abdominal neuropodia bilobed, with inner lobe blunt, outer lobe cirriform (Fig. 2 C, D). First abdominal chaetiger with 6 extra lobes or ventral cirri ventral to neuropodium, then reduced to 2 on following 3 chaetigers and 1 or 2 on subsequent chaetigers (Fig. 2 C, D). Interramal cirrus absent. Branchiae from chaetiger 5, on anterior chaetigers short, triangular, tapering to narrow papillate rounded apex (Fig. 2 B), then becoming narrower and longer, leaf-like and ciliated (Fig. 2 C, D). Thoracic notopodia with fascicles of crenulated capillaries. Abdominal notopodia with few long, thin capillaries, 2 - 4 furcate chaetae and 3 - 5 imbedded aciculae, furcate chaetae with unequal tynes, each tyne with fine needles directed medially, shaft with transverse rows of barbs (Fig. 3 E). Anterior thoracic neuropodia with 4 rows and 1 short posterior rows of yellow uncini, and posterior row of crenulate capillaries (Figs 2 E, 3 A, B, E, F). Anterior 2 rows mixed with 10 - 12 subuluncini, last row with 7 - 9 uncini, curved ventrally to anterior rows (Fig. 3 A, B). Uncini of first 1 - 4 rows short, with blunt-tipped apex, with 10 - 18 transverse rows of blunt barbs on convex side, with conspicuous groove apically (Fig. 3 B, D); uncini of last row longer than anterior ones, only located in ventral side of neuropodium (Fig. 3 A); subuluncini resemble uncini, but with distally pointed tip, with more than 30 rows of blunt barbs, surrounded by sheath (Fig. 3 B). Posterior thoracic neuropodia with 4 - 7 modified spines (Fig. 3 C), single short row of uncini and 1 or 2 rows crenulate capillaries. Modified spines large, hastate, superior one projecting from neuropodium, with glandular pouch (Fig. 3 C). Abdominal neurochaetae including 4 - 6 thin capillaries and single acicula, thin and imbedded. Anterior thoracic neuropodia with 5 or 6 rows of yellow uncini and posterior row of crenulate capillaries (Figs 2 E, 3 A, B). Anterior 2 rows mixed with 10 - 12 subuluncini, last row with 7 - 9 uncini, curved ventrally to anterior rows (Fig. 3 A, B). Uncini of anterior 4 or 5 rows short, with blunt-tipped apex, with 10 - 18 transverse rows of blunt barbs on convex side, with conspicuous groove apically (Fig. 3 B, D); uncini of last row longer than anterior ones, only located in ventral side of neuropodium (Fig. 3 A). Subuluncini resemble uncini but with distally pointed tip, with more than 30 rows of blunt barbs, surrounded by sheath (Fig. 3 B). Posterior thoracic neuropodia with 4 - 7 modified spines (Fig. 3 C), single short row of uncini and 1 or 2 rows crenulate capillaries. Modified spines large, hastate, superior one projecting from neuropodium (Fig. 3 C). Abdominal neurochaetae including 4 - 6 thin capillaries and single acicula, thin and imbedded. Pygidium not observed.	en	Sun, Yue, Yu, Lei, Li, Xinzheng (2021): A new species and a new species record of Orbiniidae Hartman, 1942 (Annelida, Polychaeta) from China. ZooKeys 1068: 1-11, DOI: http://dx.doi.org/10.3897/zookeys.1068.71925, URL: http://dx.doi.org/10.3897/zookeys.1068.71925
A2E7DB986B785109BE12E30E45C24BEC.taxon	etymology	Etymology. The species is named for the thoracic neuropodia with two kinds of uncini.	en	Sun, Yue, Yu, Lei, Li, Xinzheng (2021): A new species and a new species record of Orbiniidae Hartman, 1942 (Annelida, Polychaeta) from China. ZooKeys 1068: 1-11, DOI: http://dx.doi.org/10.3897/zookeys.1068.71925, URL: http://dx.doi.org/10.3897/zookeys.1068.71925
