identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
03E887F537643F06FED0FF7197DC3739.text	03E887F537643F06FED0FF7197DC3739.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Metrocoris Mayr. However 1865	<div><p>Metrocoris Mayr, 1865</p> <p>Metrocoris Mayr, 1865: 445 (type species: Metrocoris brevis Mayr, 1865, currently Metrocoris stali (Dohrn, 1860), by monotypy); Esaki, 1926: 122–130; den Boer, 1965: 1–38 (revision); Polhemus, 1990: 1–28 (regional revision: Malay Archipelago &amp; Philippines); Chen &amp; Nieser, 1993: 1–43, 45–82 (revision); Chen, 1994: 124–134 (regional revision: China).</p> <p>Halobatodes White, 1883: 23, 58 (type species: Halobatodes histrio White, 1883, by monotypy); (synonymised by Meinert, 1888: 140).</p> <p>Gerastratus Distant, 1910: 148 (type species: Gerastratus foveatus Distant, 1910, by monotypy); (synonymised by Esaki, 1929: 417–418).</p> <p>Euodos Distant, 1910: 150 (type species: Euodos communis Distant, 1910, by monotypy); (synonymised by Esaki, 1929: 418–419).</p> <p>Metrocoropsis Paiva, 1919: 365 (type species: Metrocoropsis femorata Paiva, 1919, by monotypy); (synonymised by Esaki, 1926: 122).</p> <p>Remarks. The genus Metrocoris Mayr is recognised by the following characteristics (after Chen &amp; Nieser, 1993): They are medium sized gerrids (length of males 4.3–8.3, females 3.8–8.3), with body usually not dorso-ventrally depressed, having both apterous and macropterous forms. Dorsum of body is usually yellowish with distinct dark markings; venter of body is usually pale (with the exception of some species in the M. compar species group). Eyes are large, but not reaching antero-lateral corners of mesonotum. Fore tarsal segment 1 is much shorter than segment 2. Fore femur of the male is usually incrassate and modified ventrally; fore femur of the female is more slender than that of the male, usually not modified. Male genitalia are usually prominent, with abdominal segment 8 large, pygophore boat-shaped, and parameres well-developed. Endosomal sclerites are variable but characteristic for each species. Sternum 7 of the female is large, usually modified posteriorly, and characteristic for different species groups.</p> <p>Chen &amp; Nieser (1993: 6) indicated that Kemp (1925) synonymised Metrocoropsis Paiva with Metrocoris Mayr. However, this is not accurate. Kemp (1925: 93–94) only expressed concerns about the resemblances of Metrocoropsis femorata Paiva, 1919 to Metrocoris nigrofasciatus Distant, 1903, but did not formally synonymise Metrocoropsis Paiva with Metrocoris Mayr. The first person who included Metrocoropsis Paiva into the synonymy list for Metrocoris Mayr was actually Esaki (1926) (see Esaki, 1926: 122).</p> <p>KEY TO SPECIES OF METROCORIS OCCURING IN VIETNAM</p> <p>1. Sternum 7 shorter than and not covering genital segments ventrally. Abdominal segment 8 cylindrical, not divided along the midline on the ventral side................................. 2 (males)</p> <p>– Sternum 7 large and broad, usually covering all abdominal segment 8 ventrally. Abdominal semment 8 divided along the midline on the ventral side (Fig. 90)................... 17 (females)</p> <p>Key to males of Metrocoris</p> <p>2. Fore femur incrassate, ventrally with at least one sub-apical tooth.........................................................................................3</p> <p>– Fore femur slender, without sub-apical tooth or only with small sub-apical tooth-like elevation..............................................10</p> <p>3. Ventral margin of fore femur sinuate on distal half, appearing bi-concave (Fig. 71); paramere sharply bent on distal one-third, with broadly rounded tumescence subapically on outer margin (Figs. 36, 72)......................................................... M. obscurus</p> <p>– Ventral margin of fore femur with at most a single subapical constriction, not sinuate or biconcave as above; male paramere more evenly curving throughout its length, not sharply bent on distal one-third, without a subapical tumescence on outer margin......................................................................................4</p> <p>4. Fore femur with a median tooth and two sub-apical teeth (Figs. 44, 45)............................................................ M. stranguloides</p> <p>– Fore femur without a median tooth........................................5</p> <p>5. Fore femur with a sub-apical indentation, sub-apical edge of indentation marked with a large single tooth (Figs. 47, 48, 52, 53, 56, 57, 77).........................................................................6</p> <p>– Fore femur more or less constricted sub-apically, but without distinct indentation, apically with a bifid or bipartite sub-apical tooth.........................................................................................9</p> <p>6. Sub-apical indentation with a distinct small tooth on proximal edge (Figs. 47, 48, 52, 53, 77). Shaft of paramere not expanded on distal half............................................................................7</p> <p>– Sub-apical indentation without distinct tooth on proximal edge (Figs. 56, 57). Shaft of paramere expanded on distal half (Figs. 34, 61)........................................ M. johnpolhemi, new species</p> <p>7. Paramere with apex blunt, expanded to form a small head (Fig. 38)............................................................... M. nigrofascioides</p> <p>– Paramere with apex pointed or narrowly rounded, not expanded to form a small head...............................................................8</p> <p>8. Paramere strongly curved on distal half, apically strongly narrowed (Fig. 54).......................................... M. vietnamensis</p> <p>– Paramere curved on distal two-thirds, gradually tapering apically (Fig. 33)........................................................... M. bilobatoides</p> <p>9. Slightly smaller species (male length 4.6–6.3 mm). Pygophore sub-ovate, with apical margin rounded. Paramere as in Fig. 37............................................................................... M. acutus</p> <p>– Larger species (male length 6.3–7.0 mm). Pygophore prolonged, with apical margin straight. Paramere as in Figs. 35, 69.......................................................................................... M. quynhi</p> <p>10. Thorax (nota and pleura) with numerous black setae..........11</p> <p>– Thorax without black setae...................................................15</p> <p>11. Larger species (length 5.4–6.3 mm), body broad, roughly triangular................................................................................12</p> <p>– Smaller species (length 4.7–5.4 mm), body sub-ovate........13</p> <p>12. Fore femur constricted sub-apically, with a small tooth-like elevation (Fig. 95). Paramere long, curved dorsad on distal one-third, proximal part narrower than distal part, apex broadly rounded (Figs. 39, 96).......................... M. sicilis, new species</p> <p>– Fore femur simple, without sub-apical elevation. Paramere short, curved dorsad on distal half, proximal part broader than distal part, apex narrowly rounded (Figs. 40, 87).............................................................................................. M. triangulatus</p> <p>13. Abdominal segment 8 with a median notch on postero-dorsal margin. Paramere larger and gradually thicker distally (Figs. 91–93).................................................................... M. inthanon</p> <p>– Abdominal segment 8 without median notch on posterior margin. Paramere smaller, sickle-shaped, tapering evenly along its length to a slender apex (Figs. 41, 81, 82)....... M. ciliatus</p> <p>14. Ventral surface of fore femur not notched in the middle, usually with a small sub-apical tooth-like elevation (Fig. 123). Paramere with a sub-apical indentation, apex slightly expanded (Figs. 124, 125, 127, 128, 131–136). Middle and hind legs often extremely long, length of middle femur usually equal to or exceeding 10 mm..................................................................... M. tenuicornis</p> <p>– Ventral surface of fore femur with a notch in the middle; without sub-apical elevation (Figs. 100, 108, 117). Paramere without sub-apical indentation. Middle and hind legs usually shorter, length of middle femur less than 8 mm..................15</p> <p>15. Male genital segment long bearing dark hairs; colour marks on dorsum dark and distinct, ventral body surface broadly dark (or at least broadly embrowned) throughout its length.......16</p> <p>– Male genital segment lacking long dark hairs; dorsal markings less distinct; ventral body surface mostly pale........................................................................................ M. sapa, new species</p> <p>16. Paramere curved dorsad on distal half, apex broadened and rounded, curved outwards and posteriorly (Figs. 110–112)........................................................... M. monticola, new species</p> <p>– Paramere hook-shaped, curved up on distal one-third, apex projecting outward and anteriorly (Figs. 101–103)....................................................................... M. nigriventris, new species</p> <p>Key to females of Metrocoris</p> <p>(Note: Females can be identified with higher certainty if associated males available)</p> <p>17. Hind margin of sternum 7 simple, not modified (Figs. 85, 90, 99, 130)..................................................................................18</p> <p>– Hind margin of sternum 7 modified (with 1–2 distal lobes or with a notch)..........................................................................22</p> <p>18. Dorsum and lateral side of thorax covered with black setae. Dark markings on dorsum of body extensive...... M. inthanon</p> <p>– Thorax without black setae. Dark markings on dorsum less extensive................................................................................19</p> <p>19. Body of triangular appearance, ratio of body length/maximum width ca. 1.5–1.6/1.0.............................................................20</p> <p>– Body more ovate, ratio of body length/maximum width ca. 1.7–1.9/1.0.............................................................................21</p> <p>20. Fore femur sub-apically constricted, ventral surface with subapical elevation..................................... M. sicilis, new species</p> <p>– Ventral surface of fore femur without sub-apical elevation.............................................................................. M. triangulatus</p> <p>21. Antennal segment 2 shorter than segment 3.... M. tenuicornis</p> <p>– Antennal segment 2 longer than segment 3........... M. ciliatus</p> <p>22. Median lobe of sternum 7 bearing 4 lobes on posterior margin, with two large lateral lobes flanking a medially incised bilobate process (Fig. 70)....................................................... M. quynhi</p> <p>– Sternum 7 not as above, with a most 2 lobes flanking a medial incision...................................................................................23</p> <p>23. Posterior part of sternum 7 modified into a single lobe (Figs. 46, 76, 79, 107, 116, 122)....................................................24</p> <p>– Posterior part of sternum 7 modified into two lobes (Figs. 51, 55, 65, 73).............................................................................29</p> <p>24. Hind coxa and trochanter elongated.....................................25</p> <p>– Hind coxa and trochanter not modified as above................27</p> <p>25. Venter mostly pale. Hind coxa and trochanter covered with long hairs (Fig. 121).............................. M. sapa, new species</p> <p>– Venter with dark marks. Hind coxa and trochanter without distinct long hairs..................................................................26</p> <p>26. Hind trochanter produced apically into a small process (Fig. 106). Apex of abdomen barely surpassing apex of hind coxa. Distal lobe of sternum 7 with almost straight posterior margin (Fig. 107)..................................... M. nigriventris, new species</p> <p>– Hind trochanter not produced apically (Fig. 115). Apex of abdomen clearly surpassing apex of hind coxa, but not surpassing apex of hind trochanter. Distal lobe of sternum 7 with round posterior margin (Fig. 116)........... M. monticola, new species</p> <p>27. Distal lobe of sternum 7 broad, with long dark hairs on lateral margin (Fig. 46)............................................ M. stranguloides</p> <p>– Distal lobe of sternum 7 narrow, without long dark hairs.....................................................................................................28</p> <p>28. Sternum 7 with a median lobe of sub-rectangular shape directed apically. Pilosity on hind trochanter long and dense (Fig. 79)................................................................. M. nigrofascoides</p> <p>– Sternum 7 with a tongue-like median lobe produced apically with rounded apex. Pilosity on hind trochanter short (Fig. 76).............................................................................. M. acutus</p> <p>29. Lobes of sternum 7 small and finger-like, separated by a wide, shallow, transverse notch (Fig. 73)....................... M. obscurus</p> <p>– Lobes of sternum 7 large and angular, separated by a deep, longitudinal incision..............................................................30</p> <p>30. Sternum 7 with notch between the distal lobes narrow and angular (Fig. 51).............................................. M. bilobatoides</p> <p>– Sternum 7 with notch between the distal lobes wider........31</p> <p>31. Notch between two distal lobes with rounded margin (Fig. 55)................................................................... M. vietnamensis</p> <p>– Notch between two distal lobes with angular margin (Fig. 65).............................................. M. johnpolhemi, new species</p></div> 	http://treatment.plazi.org/id/03E887F537643F06FED0FF7197DC3739	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	A. D., Tran;Polhemus, D. A.	A. D., Tran, Polhemus, D. A. (2017): The genus Metrocoris Mayr, 1865 (Gerromorpha: Gerridae) in Vietnam, with descriptions of five new species. Raffles Bulletin of Zoology 65: 109-149, DOI: http://doi.org/10.5281/zenodo.4502634
03E887F537653F02FCF1FC3993763101.text	03E887F537653F02FCF1FC3993763101.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Metrocoris stranguloides Chen & Nieser 1993	<div><p>Metrocoris stranguloides Chen &amp; Nieser, 1993</p> <p>(Figs. 3, 4, 32, 44–46)</p> <p>Metrocoris stranguloides Chen &amp; Nieser, 1993: 16–18, Figs, 29, 38, 44–45 (type locality: Hainan Island, China); Zettel &amp; Chen, 1996: 152, 176 (faunistic notes).</p> <p>Material examined. VIETNAM: Quang Binh Prov.: 1 female (apt), 1 male (mpt), Phong Nha, upstream of Thac Xoi waterfall, coll. Tran A.D., 15 July 2004, DY0407 (ZRC). Da Nang Prov.: 6 males, 3 females (apt), 1 male, 3 females (mpt), Ba Na - Nui Chua, Suoi Cat Lon, 700 m asl, coll. Tran A.D. &amp; Tan H.H., 28 February 2005, THH05-19 (ZRC); 1 male, 1 female (apt), Ba Na - Nui Chua, rocky cascade along road to summit, coll. Tran A.D. &amp; Tan H.H., 28 February 2005, THH05-20 (ZRC); 1 male, 1 female (mpt), Ba Na-Nui Chua, Suoi Nai - Thac Cau Vong, coll. Tran A.D. &amp; Tan H.H., 01 March 2005, THH05-23 (ZRC); 2 males, 1 female (apt), 3 males (mpt), Ba Na - Nui Chua foothills, Suoi Lanh, coll. Tran A.D. &amp; Tan H.H., 01 March 2005, THH05-25 (ZMHU). Quang Ngai Prov.: 18 males, 27 females (apt), 4 males, 1 female (mpt), rocky stream crossing road on E. side of Via Lac Pass, 109 km NE. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.53833&amp;materialsCitation.latitude=14.774166" title="Search Plazi for locations around (long 108.53833/lat 14.774166)">Kontum on Hwy.</a> 24, 305 m asl, 14°46′27″N, 108°32′18″E, water temp. 26.5°C, 17 March 2001, CL 4297, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM). Kon Tum Prov.: 2 males, 5 females (apt.), stream 77 km NE. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.39389&amp;materialsCitation.latitude=14.639722" title="Search Plazi for locations around (long 108.39389/lat 14.639722)">Kontum on Hwy.</a> 24, 1195 m asl, 14°38′23″N, 108°23′38″E, water temp. 19°C, 6 March 2001, CL 4283, coll. J.T. Polhemus and P. Nguyen (USNM); 3 males, 6 females (apt), 3 females (mpt), small stream 97 km NE. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.462776&amp;materialsCitation.latitude=14.707778" title="Search Plazi for locations around (long 108.462776/lat 14.707778)">Kontum on Hwy.</a> 24, 1065 m asl, 14°42′28″N, 108°27′46″E, water temp. 21°C, 20 March 2001, CL 4303, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 4 males, 12 females (apt), 1 male, 2 females (mpt), stream 96 km NE. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.45916&amp;materialsCitation.latitude=14.699445" title="Search Plazi for locations around (long 108.45916/lat 14.699445)">Kontum on Hwy.</a> 24, 1020 m asl, 14°41′58″N, 108°27′33″E, water temp. 22°C, 20 March 2001, CL 4304, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM). Gia Lai Prov.: 12 males, 11 females (apt), 2 males, 3 females (mpt), 40 km NW. An Khe, <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.5&amp;materialsCitation.latitude=14.166667" title="Search Plazi for locations around (long 108.5/lat 14.166667)">Buon Luoi</a>, 14°10′N, 108°30′E, 620–750 m asl, coll. Pacholátko &amp; Dembicky, 28 March–12 April 1995 (NHMW, 5 males, 5 females in ZRC); 12 males, 16 females (apt), 1 female (mpt), Tral Stream, 60 km N. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.58028&amp;materialsCitation.latitude=14.341111" title="Search Plazi for locations around (long 108.58028/lat 14.341111)">An Khe</a>, 700 m asl, 14°20′28″N, 108°34′49″E, water temp. 23.5°C, 22 March 2001, CL 4309, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 4 males, 7 females (apt), 1 male, 1 female (mpt), small hill stream in primary forest, 68 km N. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.549164&amp;materialsCitation.latitude=14.347777" title="Search Plazi for locations around (long 108.549164/lat 14.347777)">An Khe</a>, 840 m asl, 14°20′52″N, 108°32′57″E, water temp. 21°C, 22 March 2001, CL 4311, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 1 female, 1 male (apt), Nuoc Stream, 47 km N. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.60472&amp;materialsCitation.latitude=14.238056" title="Search Plazi for locations around (long 108.60472/lat 14.238056)">An Khe</a>, 580 m asl, 14°14′17″N, 108°36′17″E, water temp. 24°C, 23 March 2001, CL 4312, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM). Binh Dinh Prov.: 9 males, 4 females (apt), stream in boulders on E. side of An Khe Pass, 16 km E. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.763336&amp;materialsCitation.latitude=13.961945" title="Search Plazi for locations around (long 108.763336/lat 13.961945)">An Khe on Hwy.</a> 19, 365 m asl, 13°57′43″N, 108°45′48″E, water temp. 19.5°C, 21 March 2001, CL 4307, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM). Phu Yen Prov.: 1 male, 5 females (apt), seeps and streamlets on S. side of Ca Pass, 33 km S. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=109.398056&amp;materialsCitation.latitude=12.863056" title="Search Plazi for locations around (long 109.398056/lat 12.863056)">Tuy Hoa on Hwy.</a> 1, 105 m asl, 12°51′47″N, 109°23′53″E, water temp. 25°C, 25 March 2001, CL 4315, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM). Lam Dong Prov.: 19 males, 10 females (apt), Suoi Vang, 18 km NW. of Da Lat, coll. Vásárhelyi, 17 October 1988, No. 308 (MTMB, NHMW); 69 males, 115 females (apt), 7 males, 13 females (mpt), 12 km N Dalat-LangBian, coll. P. Pacholátko &amp; L. Dembicky, 28–30 April 1994 (NHMW, ZRC); 5 males, 3 females (apt), 2 females (mpt), 12 km N <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.45&amp;materialsCitation.latitude=12.05" title="Search Plazi for locations around (long 108.45/lat 12.05)">Dalat-Langbian</a>, 12°03′N 108°27′E, 1680–1750 m asl, coll. Pacholátko &amp; Dembicky, 17–21 April 1995 (NHMW, 4 males, 4 females in ZRC); 1 male, 3 females (apt), 1 female (mpt), 16 km N <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.4&amp;materialsCitation.latitude=12.083333" title="Search Plazi for locations around (long 108.4/lat 12.083333)">Da Lat-Ankreot</a>, 12°05′N, 108°24′E, 1400 m asl, coll. Pacholátko &amp; Dembicky, 15 April 1995 (NHMW); 5 females (apt), Duc Me, 15 km S. of Bao Loc, 700 m asl, coll. Vásárhelyi, 23 October 1988, No. 371 (MTMB); 1 male, 1 female (apt), Suoi Baco, 12 km S. of Bao Loc, 800 m asl, coll. Vásárhelyi, 25 October 1988, No. 386 (MTMB); 1 male, 1 female (apt), 1 male, 4 females (mpt), Da Lat, a stream running into Dankia lake, coll. Tran A.D., 21 May 2003, TAD0330 (ZRC); 4 males, 3 females (apt), 1 female (mpt), Da Lat, Datanla waterfall, coll. Tran A.D., 22 May 2003, TAD0333a (ZRC); 3 males, 3 females (apt), 1 female (mpt), Dambri Waterfall, N. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=107.74833&amp;materialsCitation.latitude=11.637222" title="Search Plazi for locations around (long 107.74833/lat 11.637222)">Bao Lac</a>, 850 m asl, 11°38′14″N, 107°44′54″E, water temp. 24°C, 7 May 1998, CL 3075, coll. J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 7 males, 12 females (apt), small steeply dropping stream at Mother Mary Shrine, along Hwy. 20 on S. side of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=107.7225&amp;materialsCitation.latitude=11.452499" title="Search Plazi for locations around (long 107.7225/lat 11.452499)">Bao Lac Pass</a>, 18 km W. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=107.7225&amp;materialsCitation.latitude=11.452499" title="Search Plazi for locations around (long 107.7225/lat 11.452499)">Bao Lac</a>, 800 m asl, 11°27′09″N, 107°43′21″E, water temp. 24.5°C, 7 May 1998, CL 3076, coll. J.T. Polhemus &amp; P. Nguyen (DAPC); 3 males, 3 females (apt), stream below Suoi Vàng hydro project (= Gold Stream), 16 km N. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.36833&amp;materialsCitation.latitude=11.990556" title="Search Plazi for locations around (long 108.36833/lat 11.990556)">Dalat</a>, 1430 m asl, 11°59′26″N, 108°22′06″E, water temp. 24.5°C, 9 May 1998, CL 3078, coll. J.T. Polhemus &amp; P. Nguyen (DAPC); 10 males, 9 females (apt), 1 female (mpt), small tribs. to stream below Suoi Vàng hydro project (= Gold Stream), 16 km N. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.36833&amp;materialsCitation.latitude=11.990556" title="Search Plazi for locations around (long 108.36833/lat 11.990556)">Dalat</a>, 1430 m asl, 11°59′26″N, 108°22′06″E, water temp. 19.5°C, 9 May 1998, CL 3079, coll. J.T. Polhemus &amp; P. Nguyen (DAPC); 1 male (apt), spring fed trib. to stream below Suoi Vàng hydro project (= Gold Stream), 16 km N. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.36833&amp;materialsCitation.latitude=11.990556" title="Search Plazi for locations around (long 108.36833/lat 11.990556)">Dalat</a>, 1430 m asl, 11°59′26″N, 108°22′06″E, 9 May 1998, CL 3080, coll. J.T. Polhemus &amp; P. Nguyen (DAPC); 6 males, 8 females (apt), 2 males, 1 female (mpt), Prenn Falls, 13 km S. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.47195&amp;materialsCitation.latitude=11.878612" title="Search Plazi for locations around (long 108.47195/lat 11.878612)">Dalat on Hwy.</a> 20, 1160 m asl, 11°52′43″N, 108°28′19″E, water temp. 25.5°C, 10 May 1998, CL 3083, coll. J.T. Polhemus &amp; P. Nguyen (DAPC); 3 males, 1 female (apt), 4 males, 5 females (mpt), small rocky stream at Lang Biang Mtn., 12 km N. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.424164&amp;materialsCitation.latitude=12.0199995" title="Search Plazi for locations around (long 108.424164/lat 12.0199995)">Dalat</a>, 1465 m asl, 12°01′12″N, 108°25′27″E, water temp. 20°C, 11 May 1998, CL 3084, coll. J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 35 males, 27 females (apt), 3 males, 7 females (mpt), tributary stream to main river at <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.36833&amp;materialsCitation.latitude=11.990556" title="Search Plazi for locations around (long 108.36833/lat 11.990556)">Suoi Vang</a>, 1430 m asl, 11°59′26″N, 108°22′06″E, water temp. 21°C, 11 and 18 May 1998, CL 3085, coll. J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 3 females (apt), 2 males (mpt), stream and cascade 6 km S. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.44611&amp;materialsCitation.latitude=11.902778" title="Search Plazi for locations around (long 108.44611/lat 11.902778)">Dalat on Hwy.</a> 20, 1390 m asl, 11°54′10″N, 108°26′46″E, 20 May 1998, CL 3095, coll. J.T. Polhemus &amp; P. Nguyen (DAPC); 15 males, 24 females (apt), 4 males, 5 females (mpt), stream in pine forest 13 km N. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.38861&amp;materialsCitation.latitude=11.990556" title="Search Plazi for locations around (long 108.38861/lat 11.990556)">Dalat on Suoi Vang</a> road, 1495 m asl, 11°59′26″N, 108°23′19″E, water temp. 21.5°C, 28 March 2001, CL 4317, D.A. Polhemus, J.T. Polhemus and P. Nguyen (USNM, BPBM). Ninh Thuan Prov.: 1 male (apt), Nui Chua N’Park, suoi Lo O, coll. Quang N.V., 26 June 2004, NC-03 (ZRC); 19 males, 40 females (apt), 2 males (mpt), first small stream on E. side of Belleview Pass (Ngoan Muc Pass), 66 km NW. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.65584&amp;materialsCitation.latitude=11.840278" title="Search Plazi for locations around (long 108.65584/lat 11.840278)">Phan Rang</a>, pools and cascades, 915 m asl, 11°50′25″N, 108°39′21″E, water temp. 24°C, 12 May 1998 and 26 March 2001, CL 3087, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (DAPC, USNM, BPBM); 3 males, 1 female (apt), 1 male (mpt), spring fed stream in granite at shrine on E. side of Belleview Pass (Ngoan Muc Pass), 58 km NW. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.66583&amp;materialsCitation.latitude=11.844722" title="Search Plazi for locations around (long 108.66583/lat 11.844722)">Phan Rang</a>, 700 m asl, 11°50′41″N, 108°39′57″E, water temp. 724°C, 12 May 1998, CL 3089, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (DAPC).</p> <p>CHINA: Hainan Prov.: 1 female (apt), Hainan (193), 30 km E. Maoyang, 600 m asl, Wuzhi Shan Resort, coll. Jäch, 17–18 January 1996 (NHMW); 1 female (mpt), Wuzhishan, hill stream near Fanxiang, before Shuiman, coll. I-S. Chen et al., 9 September 2005, THH05-67 (ZRC); 13 males, 7 females (apt), 1 female (mpt), Qiongzhong, Baihua waterfall, near Qiongzhong town, coll. I-S. Chen et al., 11 September 2005, THH05-73 (ZRC); 1 male (apt), Qiongzhong, Linmushan forest park, ca. 15 km into track from road, coll. I-S. Chen et al., 11 September 2005, THH05-77 (ZRC); 1 male, 4 females (apt), 1 female (mpt), Baisha, river along road near Yuanmen, to Wuzhishan, coll. I-S. Chen et al., 12 September 2005, THH05-82 (ZRC).</p> <p>LAOS: Luang Nam Tha Prov.: 3 males, 1 female (apt), 2 females (mpt), 20 km SE. Muang Sing, 950 m asl, coll. Schillhammer (25), 12 June 1996 (NHMW).</p> <p>Diagnosis. Male: fore femur strongly incrassate with two sub-apical teeth and a median tooth (Figs. 44, 45). Male genitalia large: pygophore sub-ovate (ventral view), slightly raised posteriorly (lateral view); proctiger elongate; paramere long and slender, curved at distal part, but not twisted (Fig. 32); endosoma as in Chen &amp; Nieser (1993: Figs. 44, 45). Female: sternum 7 with broad median lobe, posterior margin of median lobe almost straight (Fig. 46).</p> <p>Size: apterous males: length 5.5–6.5, width 2.81–3.23, macropterous males: length 7.2–8.3, width 2.71–3.14; apterous females: length 4.8–5.4, width 2.57–3.05, macropterous females: length 6.2–7.4, width 2.67–3.20.</p> <p>Remarks. Metrocoris stranguloides is the only species of the M. strangulator group known from Vietnam. As defined by Chen &amp; Nieser (1993), the following are characteristics of this group: strongly incrassate fore femur (males), with two sub-apical teeth and a median tooth; large male genitalia with prominent paramere; sternum 7 of female with broad medial lobe. This group contains five species: M. stragulator Breddin (from Java and Sumatra), M. armatus Chen &amp; Nieser (from Thailand), M. malayensis Chen &amp; Nieser (from Thailand and Peninsular Malaysia), M. nieseri Chen &amp; Zettel (from Thailand), and M. stranguloides Chen &amp; Nieser (initially described from Hainan Island and S. Vietnam). Metrocoris stranguloides can be easily distinguished from the other four species in this group by having a long and slender paramere, simply curved on the distal part but not twisted (Chen &amp; Nieser, 1993). Females of this species are also rather different from those of the other four taxa in having a straight hind margin of the median lobe on sternum 7 (females of the other four species have a clearly notched posterior margin on sternum 7).</p> <p>Distribution. Vietnam: Quang Binh (first record), Da Nang (first record), Ninh Thuan (first record), Gia Lai, Lam Dong, Kon Tum (first record), Quang Ngai (first record) (Fig. 138). Extralimital records: Hainan Island (China), Laos (first record).</p> </div>	http://treatment.plazi.org/id/03E887F537653F02FCF1FC3993763101	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	A. D., Tran;Polhemus, D. A.	A. D., Tran, Polhemus, D. A. (2017): The genus Metrocoris Mayr, 1865 (Gerromorpha: Gerridae) in Vietnam, with descriptions of five new species. Raffles Bulletin of Zoology 65: 109-149, DOI: http://doi.org/10.5281/zenodo.4502634
03E887F537613F0FFF24FA51938F3121.text	03E887F537613F0FFF24FA51938F3121.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Metrocoris bilobatoides Chen & Nieser 1993	<div><p>Metrocoris bilobatoides Chen &amp; Nieser, 1993</p> <p>(Figs. 1, 2, 5, 6, 33, 47–51)</p> <p>Metrocoris bilobatoides Chen &amp; Nieser, 1993: 20–21, Figs. 48, 52–53, 60–62 (type locality: Tam Dao, Vinh Phuc, Vietnam).</p> <p>Material examined. VIETNAM: Ha Giang Prov.: 2 males, 1 female (apt), 1 male (mpt), Vi Xuyen, Xin Chai commune, Da stream by the road from Thanh Thuy to Lao Chai, coll. Tran A.D. et al., 09 May 2014, TAD1405 (ZMHU); 3 males, 1 female (mpt), Bac Quang, km 13 road 177, Tan Lap commune, waterfall &amp; stream, ca. 86 km to Coc Pai town, coll. Tran A.D. et al., 10 May 2014, TAD1410 (ZMHU); 1 male (apt), 1 male, 1 female (mpt), Hoang Su Phi, Nam Ty commune, bridge at km 34 road 177, waterfall &amp; stream, ca. 65 km to Coc Pai, coll. Tran A.D. et al., 10 May 2014, TAD1411 (ZMHU); 3 males, 3 females (apt), 4 males, 1 female (mpt), Xin Man, Nam Dan commune, Thac Tien - Deo Gio, stream 100 m below waterfall, coll. Tran A.D. et al., 11 May 2014, TAD1413 (ZMHU); 1 female (apt), Xin Man, Nam Dan commune, Thac Tien - Deo Gio, waterfall &amp; stream, coll. Tran A.D. et al., 11 May 2014, TAD1414 (ZMHU). Lao Cai Prov.: 1 female (apt), Sa Pa, Nui Xe, small waterflow near the Forest Ranger Station, coll. Tran A.D., 2 June 2003, TAD0339 (ZRC); 1 male (mpt), Sa Pa, Hoang Lien N’Park, Sin Chai, coll. Tran A.D., 1 June 2003, TAD0337 (ZRC); 3 males, 2 females (apt), Sa Pa, Hoang Lien N’Park, Sin Chai, coll. Tran A.D., 3 July 2004, TAD0415 (ZRC); 4 males, 5 females (apt), Cat Cat, 1200 m asl, 5 km SW. of Sa Pa, 22°19.720′N 103°50.023′E, coll. L. Peregovits &amp; T. Vásárhelyi, 12 March 1998, <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.83372&amp;materialsCitation.latitude=22.328667" title="Search Plazi for locations around (long 103.83372/lat 22.328667)">No.</a> 1 (MTMB); 22 males, 32 females (apt), 2 males, 3 females (mpt), rocky river and tributary 7 km NE. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.87112&amp;materialsCitation.latitude=22.371944" title="Search Plazi for locations around (long 103.87112/lat 22.371944)">Sa Pa on Lào Cai</a> road, 1220 m asl, 22°22′19″N, 103°52′16″E, water temp. 17°C, 7 April 2000, 0830–1000 hrs., CL 4395, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 2 females (apt), rocky streamlet with cascades, 16 km NW. of Sa Pa on Lai Chau road, 1890 m asl, 22°21′28″N, 103°46′37″E, water temp. 17°C, 8 April 2000, 1315–1330 hrs., CL 4402, D.A. Polhemus, J.T. Polhemus &amp; P. <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.77695&amp;materialsCitation.latitude=22.357779" title="Search Plazi for locations around (long 103.77695/lat 22.357779)">Nguyen</a> (USNM, BPBM); 26 males, 20 females (apt), 1 female (mpt), rocky stream 12 km NW. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.79305&amp;materialsCitation.latitude=22.372778" title="Search Plazi for locations around (long 103.79305/lat 22.372778)">Sa Pa on Lai Chau</a> road, 1815 m asl, 22°22′22″N, 103°47′35″E, water temp. 18.5°C, 8 April 2000, 1530–1645 hrs., CL 4404, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 1 male (apt), cascading stream 20 km NE. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.92667&amp;materialsCitation.latitude=22.438889" title="Search Plazi for locations around (long 103.92667/lat 22.438889)">Sa Pa on Lào Cai</a> road, 565 m asl, 22°26′20″N, 103°55′36″E, water temp. 19°C, 9 April 2000, 1215–1430 hrs., CL 4406, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 2 males, 1 female (apt), Sapa area, small stream crossing road from Quy Hô to Ta Giang Phinh, 9 May 1995, coll. D. Currie, B. Hubley &amp; J. Swann, ROM 956023, hemock forest, second growth (USNM); 1 male (apt), Sa Pa, Cat Cat, Muong Hoa stream, coll. Dinh N.H. et al., 22 April 2011, DNH11.01 (ZMHU); 1 male, 1 female (apt), 1 male, 1 female (mpt), Sa Pa, Sin Chai, Muong Hoa stream, coll. Dinh N.H. et al., 22 April 2011, DNH11.03 (ZMHU); 1 male (apt), Sa Pa, Sin Chai, feeder stream of Muong Hoa stream, coll. Dinh N.H. et al., 22 April 2011, DNH11.04 (ZMHU); 1 male (apt), Sa Pa, O Quy Ho pass, stream and waterfall, ca. 9 km from Sa Pa town, coll. Dinh N.H. et al., 23 April 2011, DNH11.11 (ZMHU); 1 male, 1 female (mpt), Sa Pa, Ban Den, Ta Van, Muong Hoa stream, coll. Dinh N.H. et al., 24 April 2011, DNH11.13 (ZMHU); 1 male, 2 females (apt), Sa Pa, Ban Ho, Nam Pu stream 2, coll. Dinh N.H. et al., 22 October 2012, DNH12.02 (ZMHU); 1 male, 1 female (apt), Sa Pa, Seo Trung Ho stream, coll. Dinh N.H. et al., 22 October 2012, DNH12.05 (ZMHU); 1 male, 2 females (apt), Sa Pa, Thanh Phu, near junction of Nam Cang and Muong Hoa streams, coll. Dinh N.H. et al., 23 October 2012, DNH12.06 (ZMHU); 1 female (apt), Sa Pa, Nam Sai, Seo Nam Sai stream 1, coll. Dinh N.H. et al., 24 October 2012, DNH12.09 (ZMHU); 3 females (apt), Sa Pa, Ban Ho, Nam Pu stream (feeder stream of Muong Hoa stream), site 1, at lower section, coll. Tran A.D. et al., 26 October 2013, TAD1361 (ZMHU); 7 males, 7 females (apt), Sa Pa, Sin Chai, Sin Chai stream, site 1, coll. Tran A.D. et al., 27 October 2013, TAD1363 (ZMHU); 2 males, 4 females (apt), Sa Pa, Sin Chai, Sin Chai stream, site 2, feeder stream, coll. Tran A.D. et al., 27 October 2013, TAD1364 (ZMHU); 1 female (apt), 1 male (mpt), Sa Pa, Sin Chai, Muong Hoa stream (Cát stream), coll. Tran A.D. et al., 27 October 2013, TAD1365 (ZMHU); 2 females (apt), Sa Pa, Cat Cat, Ho stream (feeder stream of Muong Hoa stream), coll. Tran A.D. et al., 27 October 2013, TAD1366 (ZMHU); 2 males, 4 females (apt), Sa Pa, Cat Cat, Muong Hoa stream (Cát stream), coll. Ngo Q.H. et al., 27 October 2013, TAD1367 (ZMHU); 2 males (apt), 1 female (mpt), Sa Pa, Trung Chai, km119 Nat. Road #4D, coll. Ngo Q.H. et al., 28 October 2013, TAD1370 (ZMHU). Vinh Phuc Prov.: 5 males, 2 females (apt), Tam Dao, 1200 m asl, coll. Vásárhelyi, 14 October 1986, No. 50 (MTMB, NHMW); 2 males (mpt), Vinh Phu, Tam Dao, 1200 m asl, coll. M. Josifov, 8 April 1978 (NHMW); 1 male (apt), Tam Dao, forest stream, 1000–1100 m asl, coll. Papácek, 17 May 1995 (NHMW); 12 males, 10 females (apt), 13 males, 10 females (mpt), Vinh Phu, Tam Dao, coll. L. Dembicky, 9–18 May 1996 (NHMW); 1 female (apt), 2 females (mpt), 21°27′N 105°39′E, 70 km NW. Hanoi, Tam Dao, 900–1200 m asl, coll. Pacholátko &amp; Dembicky, 9–19 May 1996 (NHMW); 2 males, 1 female (apt), Tam Dao, 1200 m asl, coll. Vásárhelyi, 12 October 1986, No. 26 (MTMB); 3 males (apt), Tam Dao, 1200 m asl, on light, coll. Vásárhelyi, 13 October 1986, No. 37 (MTMB); 7 males, 11 females (apt), 3 males (mpt), Tam Dao N’Park, Suoi Mo (upstream of Thac Bac waterfall), coll. Tran A.D., 16 June 2003, TAD0350 (ZRC); 8 males, 7 females (apt), 2 females (mpt), Tam Dao N’Park, Thac Bac stream (near Doi Che), coll. Tran A.D., 17 June 2003, TAD0351 (ZRC); 7 males, 6 females (apt), 3 males, 4 females (mpt), Tam Dao N’Park, Suoi Bua Lon (Bua Lon stream), coll. Tran A.D., 19 June 2003, TAD0356 (ZRC); 2 males, 3 females (apt), 1 male (mpt), stream at Tam Dao, NW. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=105.64583&amp;materialsCitation.latitude=21.464724" title="Search Plazi for locations around (long 105.64583/lat 21.464724)">Hanoi</a>, 940 m asl, vic. 21°27′53″N, 105°38′45″E,water temp. 17°C, 18 March 2000, CL 4359, coll. J.T. Polhemus &amp; P. Nguyen (USNM); 1 male, 1 female (apt), waterfall below Tam Dao, NW. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=105.64305&amp;materialsCitation.latitude=21.453056" title="Search Plazi for locations around (long 105.64305/lat 21.453056)">Hanoi</a>, 870 m asl, 21°27′11″N, 105°38′35″E, water temp. 17°C, 18 March 2000, CL 4360, coll. J.T. Polhemus &amp; P. Nguyen (USNM, BPBM). Ninh Binh Prov.: 1 male, 1 female (apt), Cuc Phuong, 400 m asl, coll. Vásárhelyi, 17 October 1986, No. 68 (MTMB).</p> <p>Diagnosis. Male: fore femur moderately incrassate (variations existed, ratio length/width about 3.60–4.75), indentation on ventral surface with small tooth on proximal edge, and a stout sub-apical tooth (in more slender fore femur, indentation usually smaller, Figs. 47, 48). Male genitalia large: segment 8, pygophore and proctiger elongate; paramere prominent, falciform with pointed apex (Fig. 33), endosoma as in Chen &amp; Nieser (1993: Fig. 62). Female: tergum 7 sub-triangular, sometimes apex medially produced (Figs. 49, 50); sternum 7 large, posterior part constricted and produced two separate lobes, sometimes curved dorsad, completely enclosing genitalia, the notch between two lobes narrow, angular (Fig. 51).</p> <p>Size: apterous males: length 5.3–5.8, width 2.38–2.81, macropterous males: length 6.6–7.6, width 2.29–2.64 (mpt); apterous females: length 4.8–5.6, width 2.57–2.87, macropterous females: length 6.3–6.8, width 2.62–2.77.</p> <p>Remarks. The specimens from Lao Cai Prov. present some structural variations in regard to tergum 7 of the female. In the female specimens from this locality, tergum 7 has its apex distinctly produced (Fig. 50), while female specimens from the type locality have the apex only slightly produced (Fig. 49). Other characters (endosoma, fore leg, parameres of the male, sternum 7 of the female) indicate that these populations are conspecific, with the variations in tergum 7 representing intra-specific variation. For further notes, see Remarks for M. johnpolhemi, new species.</p> <p>Distribution. Vietnam: Lao Cai, Ha Giang (first record), Vinh Phuc, Ninh Binh (Fig. 138).</p></div> 	http://treatment.plazi.org/id/03E887F537613F0FFF24FA51938F3121	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	A. D., Tran;Polhemus, D. A.	A. D., Tran, Polhemus, D. A. (2017): The genus Metrocoris Mayr, 1865 (Gerromorpha: Gerridae) in Vietnam, with descriptions of five new species. Raffles Bulletin of Zoology 65: 109-149, DOI: http://doi.org/10.5281/zenodo.4502634
03E887F5376C3F0FFF52FAF1975E30C1.text	03E887F5376C3F0FFF52FAF1975E30C1.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Metrocoris vietnamensis Tran & Zettel 2005	<div><p>Metrocoris vietnamensis Tran &amp; Zettel, 2005</p> <p>(Figs. 9, 52–55)</p> <p>Metrocoris vietnamensis Tran &amp; Zettel, 2005: 42–45, Figs. 1–9, 24, 26, 27 (type locality: Ba Na - Nui Chua, Da Nang, Vietnam).</p> <p>Material examined. Holotype and paratypes: see Tran &amp; Zettel (2005).</p> <p>Others: VIETNAM: Da Nang Prov.: 1 male, 1 female (apt), Ba Na - Nui Chua, Suoi Nai - Thac Cau Vong, coll. Tran A.D. &amp; Tan H.H., 01 March 2005, THH05-23 (ZRC); 3 males, 5 females (apt), Ba Na - Nui Chua, Suoi Vong Nguyet, coll. Tran A.D. &amp; Tan H.H., 01 March 2005, THH05-24 (ZRC).</p> <p>Diagnosis. Male: fore femur variably incrassate (ratio length/width: 3.03–4.36), ventral surface of fore femur in distal one-fourth with black indentation which proximally marked by distinct tooth, and with single stout sub-apical tooth; inner surface of fore tibia subbasally with tooth-like elevation (indistinct in males with small fore leg) (Figs. 52, 53). Male genitalia: pygophore not raised posteriorly, caudal margin broadly rounded, caudal face with paired, shallow impressions, dorso-lateral process curved and apically blunt (see Tran &amp; Zettel, 2005: Figs. 4, 5); proctiger elongate (see Tran &amp; Zettel, 2005: Fig. 5); paramere prominent, falciform, strongly curved and apically strongly narrowed (Fig. 54); endosoma: dorsal sclerite long and recurved proximally, apical accessory sclerite distinct, lateral sclerite very large, slightly curved, ventral sclerite short, thin accessory lateral sclerite present (see Tran &amp; Zettel, 2005: Figs. 7, 8). Sternum 7 of female (Fig. 55): large, slightly longer than preceding abdominal sterna together, posterior one-third constricted, bifid forming two widely separated lobes, slightly slanting but not curved dorsad; notch between lobes as wide as each lobe; apices of lobes pointed, reaching apex of abdomen in ventral view.</p> <p>Size: apterous males: length 6.0–6.8 (holotype 6.7), width 2.67–3.06 (holotype 2.96), macropterous males: length 6.2, width 2.73; apterous females: length 5.1–5.5 (allotype 5.4), width 2.81–3.10 (allotype 3.01).</p> <p>Remarks. Metrocoris vietnamensis belongs to the Metrocoris bilobatus species group (sensu Chen &amp; Nieser, 1993), and is the second species of this group found in Vietnam, the first being M. bilobatoides (see Chen &amp; Nieser, 1993). A detailed comparison of Metrocoris vietnamensis with its congeners in the M. bilobatus group has already been provided by Tran &amp; Zettel (2005: 44–45). For further comparisons with other members of M. bilobatus group which occur in Vietnam, see subsequent Remarks under M. johnpolhemi, new species.</p> <p>Distribution. Vietnam: Da Nang (Fig. 138).</p></div> 	http://treatment.plazi.org/id/03E887F5376C3F0FFF52FAF1975E30C1	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	A. D., Tran;Polhemus, D. A.	A. D., Tran, Polhemus, D. A. (2017): The genus Metrocoris Mayr, 1865 (Gerromorpha: Gerridae) in Vietnam, with descriptions of five new species. Raffles Bulletin of Zoology 65: 109-149, DOI: http://doi.org/10.5281/zenodo.4502634
03E887F5376C3F08FC27FB5190C536A1.text	03E887F5376C3F08FC27FB5190C536A1.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Metrocoris johnpolhemi A.D. & Polhemus 2017	<div><p>Metrocoris johnpolhemi, new species</p> <p>(Figs. 7, 8, 34, 56–65)</p> <p>Material examined. Holotype (apterous male) &amp; allotype (apterous female): VIETNAM: Hanoi, Ba Vi N’Park, stream near Coste 400, ca. 550 m asl, coll. Ngo Q.H. &amp; Tran A.D., 27 April 2012, TAD1210 (ZMHU).</p> <p>Paratypes: VIETNAM: Hanoi: 11 males, 7 females (apt), 2 males, 2 females (mpt), same locality data as holotype (ZMHU, ZRC, NHMW); 3 males, 6 females (apt), Ba Vi N’Park, stream near Coste 400, ca. 550 m asl, coll. Ngo Q.H. et al., 16 December 2011, TAD1120 (ZMHU); 1 female (apt), Ba Vi N’Park, Minh Quang, stream near by Tan Vien Pagoda, 340 m asl, coll. Ngo Q.H. et al., 17 December 2011, TAD1125 (ZMHU); 1 female (apt), Ba Vi N’Park, nr. Son Tay, W. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=105.35333&amp;materialsCitation.latitude=21.058887" title="Search Plazi for locations around (long 105.35333/lat 21.058887)">Hanoi</a>, first small stream on lower road, 575 m asl, 21°03′32″N, 105°21′12″E, water temp. 18°C, 4 April 2000, CL 4391, coll. J.T. Polhemus &amp; P. Nguyen (USNM). Phu Tho Prov.: 1 male (mpt), Xuan Son N’Park, Lap stream, site 1, at Ngoc waterfall, coll. Tran A.D. et al., 5 June 2013, TAD1331 (ZMHU); 1 male (apt), 1 male (mpt), Xuan Son N’Park, Kim Thuong, Tan Ong stream, site 1, at Chin Tang waterfall, coll. Tran A.D. et al., 6 June 2013, TAD1334 (ZMHU); 1 male, 1 female (apt), Xuan Son N’Park, Kim Thuong, Tan Ong stream, site 1, at Chin Tang waterfall, coll. Nguyen T.S. et al., 26 August 2014, TS1401 (ZMHU); 1 male, 2 females (mpt), Xuan Son N’Park, Kim Thuong, Tan Ong stream, site 1, at Chin Tang waterfall, coll. Nguyen T.S. et al., 22 May 2015, TS1503 (ZMHU); 2 males, 2 females (mpt), Xuan Son N’Park, Lap stream, site 1, at Ngoc waterfall, coll. Tran A.D. et al., 23 May 2015, TS1511 (ZMHU). Lai Chau Prov.: 2 females (apt), 2 males, 4 females (mpt), Nam Ceung stream, trib. to Nam Na River, 15.5 km N. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.1925&amp;materialsCitation.latitude=22.147778" title="Search Plazi for locations around (long 103.1925/lat 22.147778)">Lai Chau</a>, 200 m asl, 22°08′52″N, 103°11′33″E, water temp. 21.5°C, 11 April 2000, 10:00–13:00 hrs., CL 4409, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 1 male, 2 females (apt), 3 females (mpt), cascading stream 12 km N. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.191666&amp;materialsCitation.latitude=22.121944" title="Search Plazi for locations around (long 103.191666/lat 22.121944)">Lai Chau</a>, 290 m asl, 22°07′19″N, 103°11′30″E, water temp. 22°C, 11 April 2000, 13:45–16:00 hrs., CL 4410, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 1 male, 1 female (mpt), Tam Duong, Ho Thau, stream at Su Thang brigde, km 9 Nat. Road #4D, coll. Tran A.D. et al., 31 May 2013, TAD1324 (ZMHU).</p> <p>Diagnosis. Male: fore femur variably incrassate (ratio length/ width: 3.32–4.25, holotype: 3.32), ventral surface of fore femur in distal one-fourth with indentation and with single large sub-apical tooth; inner surface of fore tibia subbasally with tooth-like elevation (Figs. 56, 57). Male genitalia large: pygophore not raised posteriorly, caudal margin broadly rounded, dorso-lateral process curved and apically blunt (Fig. 59); proctiger elongate (Fig. 60); paramere prominent, falciform, strongly curved, slightly expanded on distal part, apex rounded (Figs. 34, 61); endosoma (Figs. 62, 63): dorsal sclerite long and recurved proximally, apical accessory sclerite small and weakly sclerotised, lateral sclerite broad and long, accessory lateral sclerite present. Female: tergum 7 subtriangular, not produced posteriorly (Fig. 64); sternum 7 (Fig. 65) large, distinctly longer than preceding abdominal sterna together, posterior one-third constricted and forming two widely separated lobes, apices of lobes angular, surpassing apex of proctiger in ventral view, the notch between lobes as wide as each lobe and with angular margin.</p> <p>Description. Size: apterous males: length 6.32–6.72 (holotype: 6.65), width 2.85–3.05 (holotype: 3.02); macropterous males: wings 8.10–8.20, width 2.97–3.07; apterous females: length 5.19–5.70 (allotype: 5.70), width 2.93–3.17 (allotype: 3.09); macropterous females: 7.20, width 2.94–2.97.</p> <p>Colour (Figs. 7, 8): Apterous morph: Dorsal dark markings prominent. Interocular area with light brown mark or without dark mark. Antenna: segment 1 almost entirely yellowish or with distal part brown, segments 2–4 light brown to dark brown. Pronotum with median black T-shaped mark at anterior margin and with two dark brown or black marks near anterolateral margin. Mesonotum with black marks: lateral stripes and median longitudinal stripe slender, running toward posterior margin and connected with anterior mark; sublateral stripes slender; each side of mesopleura with a longitudinal slender brown mark, usually variable. Metanotum with black marks running along anterior and lateral margins and with a medial longitudinal mark, bordering two broad, hookshaped yellowish marks; metacetabula with black stripe, running throughout its length. Fore femur: (a) of the male with apical dark ring and four longitudinal marks of which ventral mark dark brown and connected with ring, and lateral marks dark brown, not confluent with ring, dorsal mark light brown and not confluent with ring; (b) of the female with three slender, usually light brown, longitudinal mark, one on dorsal, one on ventral and the other one on external side of femur, all not confluent with dark ring. Fore tibia yellowish at basal one-fifth or basal one-fourth, distal part dark brown; fore tarsus dark brown. Middle and hind legs: femora yellow or sometimes brownish, tibiae and tarsi dark brownish. Abdomen mainly blackish dorsally, tergum 1 with one yellowish mark posteriorly, terga 2–7: anterior halves blackish, posterior halves yellowish. Venter bright yellowish. Macropterous morph: Pronotum with black mark on anterior margin, confluent with anterolateral marks and the median longitudinal stripe; two light brown sublateral marks confluent with the median stripe; lateral margin between anterior corner and humeri dark brown; posterior margin between humeri and apex yellowish. Fore wings mainly dark brown, anterior margin yellowish.</p> <p>Apterous male (holotype): Head width 1.72; interocular width 0.63; eye size 0.82. Lengths of antennal segments 1–4: 2.50: 1.05: 0.99: 0.84. Pronotum length 0.69. Mesonotum length 1.57. Lengths of leg segments: fore leg: 3.15: 2.70: 0.16: 0.93; middle leg: 7.70: 5.70: 2.60: 0.34; hind leg: 7.60: 4.53: 0.35: 0.41. Fore femur incrassate, width of femur: 0.95, ratio length/width: 3.32, black granules scattered along ventral surface; other characteristics of fore femur as in Diagnosis above (Figs. 56, 57). Abdomen length on ventral view: 2.69, pregenital length 0.65; sternum 7 slightly longer than sterna 5 and 6 combined, length 0.25. Genitalia of male: Abdominal segment 8 (Fig. 58): large, with posterodorsal margin strongly upcurved; posterior dorsum and lateral sides of segment bearing long hairs; postero-ventral margin bearing short, but wide lobe, ventral length 0.85, width 1.37. Characteristics of pygophore, proctiger, paramere, and endosoma as in Diagnosis above.</p> <p>Apterous female (allotype): Head width 1.64; interocular width 0.61; eye size 0.77. Lengths of antennal segments 1–4: 1.83: 0.85: 0.93: 0.79. Pronotum length 0.52. Mesonotum length 1.50. Lengths of leg segments: fore leg: 2.33: 2.13: 0.15: 0.77; middle leg: 6.10: 4.50: 2.15: 0.29; hind leg: 5.90: 3.75: 0.27: 0.37. Fore femur slender, without teeth, width 0.36, ratio length/width: 6.47. Abdominal venter length 1.63, length of tergum 7: 0.43, length of sternum 7: 0.88. Shape of sternum 7: see Diagnosis above.</p> <p>Macropterous male: Head width 1.71, interocular width 0.68, eye size 0.79. Lengths of antennal segments 1–4: 2.63: 1.08: 0.97: 0.90. Pronotum: apex of pronotal lobe pointed, median length 3.60, humeral width 2.75. Fore wing length 6.0. Lengths of leg segments: fore leg: 3.17: 2.69: 0.13: 0.94; middle leg: 7.60: 5.50: 2.63: 0.32; hind leg: 7.60: 4.55: 0.35: 0.39. Fore femur incrassate, ratio length/width: 3.69. Abdomen length on ventral view: 2.47, pregenital length 0.61; sternum 7 slightly longer than sterna 5 and 6 combined, length 0.25. Other characteristics as in apterous males.</p> <p>Macropterous female: Head width 1.59, interocular width 0.59, eye size 0.75. Lengths of antennal segments 1–4: 1.83: 0.81: 0.90: 0.77. Pronotum: apex of pronotal lobe pointed, median length 3.30, humeral width 2.45. Fore wing length 5.72. Lengths of leg segments: fore leg: 2.35: 2.05: 0.14: 0.76; middle leg: 6.00: 4.50: 2.25: 0.30; hind leg: 6.00: 3.88: 0.31: 0.38. Fore femur as slender as in apterous female, ratio length/width: 6.71. Abdominal venter length 1.53, length of sternum 7: 0.90. Other characteristics as in apterous females.</p> <p>Remarks. Metrocoris johnpolhemi, new species, belongs to the M. bilobatus species group (sensu Chen &amp; Nieser, 1993). This new species is similar to M. bilobatus den Boer, 1965 and M. strictus Chen &amp; Nieser, 1993, in having the sub-apical indentation on the fore femur of the male without a proximal tooth. The shape of sternum 7 of the female in M. johnpolhemi is relatively similar to that of M. bilobatus, but they can be easily separated because in M. johnpolhemi the posterior lobes are clearly slanted outwards with pointed apices, and the notch between these lobes is wider and has a clearly angular median margin (while in the latter, the lobes are pointed posteriorly with rounded apices, and the notch between the lobes is narrower and has a rounded median margin).</p> <p>In Vietnam, there are currently three known species of the M. bilobatus group, namely M. johpolhemi, new species, M. bilobatoides Chen &amp; Nieser, 1993, a taxon probably restricted to northern Vietnam, and M. vietnamensis Tran &amp; Zettel, 2005, a taxon probably restricted to central Vietnam. This new species differs from M. vietnamensis and M. bilobatoides in regard to the following structures: (1) fore femur of the male: in M. johnpolhemi there is no tooth at the proximal edge, and the sub-apical tooth is large, while the latter two species possess a small tooth at the proximal edge present together with a large sub-apical tooth; (2) the shape of paramere: in M. johnpolhemi the shaft of the paramere is expanded on the distal half with a rounded apex, while in the latter two species the shaft of the paramere tapers along its length, and has a pointed apex); (3) abdominal sternum 7 of the female: in M. johnpolhemi the distal lobes are long, surpassing the apex of the proctiger in ventral view, and the notch between the two distal lobes is wide and has an angular margin, while in M. bilobatoides the distal lobes are shorter and the notch between the lobes is narrow and angular, and in M. vietnamensis the distal lobes are also short, and the notch wide, but with a rounded margin.</p> <p>Etymology. This species is dedicated to the late Dr. John T. Polhemus, in honour of his contribution to our knowledge of water bugs in Southeast Asia.</p> <p>Distribution. Vietnam: Hanoi (Ba Vi), Lai Chau, Phu Tho (Fig. 138).</p> <p>Habitats. Specimens of M. johnpolhemi were collected from forested hill streams in several localities in northern Vietnam, at elevations ranging ca. 300–600 m above sea level.</p> </div>	http://treatment.plazi.org/id/03E887F5376C3F08FC27FB5190C536A1	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	A. D., Tran;Polhemus, D. A.	A. D., Tran, Polhemus, D. A. (2017): The genus Metrocoris Mayr, 1865 (Gerromorpha: Gerridae) in Vietnam, with descriptions of five new species. Raffles Bulletin of Zoology 65: 109-149, DOI: http://doi.org/10.5281/zenodo.4502634
03E887F5376B3F0BFF44FCB1928A33E1.text	03E887F5376B3F0BFF44FCB1928A33E1.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Metrocoris quynhi Tran & Zettel 2005	<div><p>Metrocoris quynhi Tran &amp; Zettel, 2005</p> <p>(Figs. 10, 11, 35, 66–70)</p> <p>Metrocoris quynhi Tran &amp; Zettel, 2005: 45–48, Figs. 10–17, 25, 28, 29 (type locality: Sa Pa, Lao Cai, Vietnam).</p> <p>Material examined. Holotype and paratypes: see Tran &amp; Zettel (2005).</p> <p>Others – VIETNAM: Lao Cai Prov.: 1 female (apt), Sa Pa, Hoang Lien N’Park, Nui Xe, upstream of Suoi Vang, coll. Tran A.D., 4 July 2004, TAD0416 (ZRC); 5 males, 25 females (apt), 4 males, 6 females (mpt), Sa Pa, Hoang Lien N’Park, Nui Xe, Suoi Vang, coll. Tran A.D., 4 July 2004, TAD0417 (ZRC); 2 males, 1 female (apt), 1 immature, crest of pass N. of Mt. Fan Si Pan, 18 km NW. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.76583&amp;materialsCitation.latitude=22.352777" title="Search Plazi for locations around (long 103.76583/lat 22.352777)">Sa Pa</a> on Lai Chau road, 1980 m asl, 22°21′10″N, 103°45′57″E, water temp. 16°C, 8 April 2000, 09:00–11:00 hrs., CL 4400, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM); 2 males, 5 females (apt), Sa Pa, Nui Xe, Tram Ton area, small feeder of Vang stream, near waterfall, coll. Dinh N.H. et al., 23 April 2011, DNH11.05 (ZMHU); 1 male, 1 female (apt), Sa Pa, Nui Xe, Tram Ton area, Vang stream, coll. Dinh N.H. et al., 23 April 2011, DNH11.06 (ZMHU); 2 males, 6 females (apt), Sa Pa, Nui Xe, Tram Ton area, feeder stream of Vang stream, coll. Dinh N.H. et al., 23 April 2011, DNH11.07 (ZMHU); 3 males, 1 female (apt), Sa Pa, Nui Xe, Tram Ton area, northward feeder stream of Vang stream, coll. Dinh N.H. et al., 23 April 2011, DNH11.09 (ZMHU); 1 female (apt), Sa Pa, Trung Chai, km 119 Nat. Road #4D, Mong Sen stream, coll. Dinh N.H. et al., 25 April 2011, DNH11.15 (ZMHU); 1 male (apt), Sa Pa, Nam Cang, Nam Cang stream, coll. Dinh N.H. et al., 23 October 2012, DNH12.08 (ZMHU); 5 males, 2 females (apt), 6 males, 5 females (mpt), Sa Pa, Nui Xe, Tram Ton area, Vang stream and its feeders, coll. Tran A.D., 30 May 2013, TAD1319 (ZMHU); 3 males, 3 females (apt), Sa Pa, Nui Xe, Tram Ton area, Vang stream, coll. Tran A.D. et al., 25 October 2013, TAD1356 (ZMHU); 12 males, 17 females (apt), Sa Pa, Nui Xe, Tram Ton area, feeder stream of Vang stream, coll. Tran A.D. et al., 25 October 2013, TAD1357 (ZMHU); 5 males, 5 females (apt), Sa Pa, stream from waterfall by roadside from Nui Xe to Sa Pa town, ca. 13 km from Sa Pa, coll. Tran A.D. et al., 25 October 2013, TAD1358 (ZMHU). Lai Chau Prov.: 1 male, 1 female (apt), Tam Duong, stream at San Xa Ho bridge, km 85 Nat. Road #4D, coll. Tran A.D., 31 May 2013, TAD1323 (ZMHU).</p> <p>Diagnosis. Male: fore femur incrassate (ratio length/width 3.22–3.67), distal one-third constricted, but without distinct ventral indentation, with bipartite apical tooth, of which the distal part is the elevated rim of the ventral surface; inner face of fore tibia with subbasal tooth-like elevation (Fig. 66). Male genitalia: abdominal segment 8 large (see Tran &amp; Zettel, 2005: Fig. 11); pygophore, on dorsal view, prolonged and subapically constricted, with apical margin straight, and with straight, slender dorsolateral process (Figs. 67, 68); proctiger long, with narrow distal part (Fig. 68); paramere hook-shaped, apically pointed (Figs. 35, 69); endosoma: dorsal sclerite long and recurved proximally, apical accessory sclerite indistinct, lateral sclerite straight, ventral sclerite long (see Tran &amp; Zettel, 2005: Figs. 15, 16). Abdomen of female: sternum 7 (Fig. 70) with large medial lobe; lateral parts with longitudinal ridge from anterior end of incision to hind margin, and with small, mediad directed, wing-shaped lobes covering most-lateral parts of medial lobe; medial lobe subtrapezoidal, with distinctly notched hind margin, slanted dorsocaudad; on dorsal view, tergum 7 small, hidden under tergum 6.</p> <p>Size: apterous males: length 6.3–7.0 (holotype 6.6), width 3.03–3.25 (holotype 3.10), macropterous males: length 6.4–6.5, width 3.00–3.30; apterous females: length 5.4–5.8 (allotype 5.45), width 3.30–3.40 (allotype 3.40), macropterous females: length 5.0–5.5, width 3.01–3.30.</p> <p>Remarks. Metrocoris quynhi belongs to the M. anderseni species group (sensu Chen &amp; Nieser, 1993) and is the first species of this group found in Vietnam. The morphological characteristics of the M. anderseni group and a detailed comparison of Metrocoris quynhi to other members of this group has already been provided by Tran &amp; Zettel (2005: 44–45).</p> <p>Distribution. Vietnam: Lao Cai, Lai Chau (first record) (Fig. 139).</p></div> 	http://treatment.plazi.org/id/03E887F5376B3F0BFF44FCB1928A33E1	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	A. D., Tran;Polhemus, D. A.	A. D., Tran, Polhemus, D. A. (2017): The genus Metrocoris Mayr, 1865 (Gerromorpha: Gerridae) in Vietnam, with descriptions of five new species. Raffles Bulletin of Zoology 65: 109-149, DOI: http://doi.org/10.5281/zenodo.4502634
03E887F537683F0BFC01FF719617323A.text	03E887F537683F0BFC01FF719617323A.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Metrocoris obscurus Chen & Nieser 1993	<div><p>Metrocoris obscurus Chen &amp; Nieser, 1993</p> <p>(Figs. 12, 13, 36, 71–73)</p> <p>Metrocoris obscurus Chen &amp; Nieser, 1993: 27–29, Figs. 70, 71, 76, 84 (type locality: Bumgahtauang-Hpungan, Myanmar).</p> <p>Material examined. VIETNAM, Lao Cai Prov.: 2 males, 5 females (apt), stream in open valley, 4 km NE. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.87&amp;materialsCitation.latitude=22.352777" title="Search Plazi for locations around (long 103.87/lat 22.352777)">Sa Pa on Lao Cai</a> road, 1250 m asl, 22°21′10″N, 103°52′12″E, water temp. 24°C, 9 April 2000, 1630–1700 hrs., CL 4407, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM); Cao Bang Prov.: 1 male, 3 females (apt), Bao Lac, Dinh Phung commune, near Tung Muu, stream by the Nat’ road 34, coll. Tran A.D. et al., 20 December 2013, TAD1378 (ZMHU).</p> <p>Diagnosis. Male: fore femur incrassate (ratio length/width 3.22–3.67), ventral margin sinuate on distal half (widest at ca. distal half), with a single apical tooth; inner surface of tibia without sub-basal elevation (Fig. 71). Male genitalia: abdominal segment 8 large, ventral side about as long as wide; pygophore long, with apical margin broadly rounded, dorsolateral process of pygophore short and directed dorsad; proctiger long, with narrow distal half; paramere sharply bent on distal one-third, with broadly rounded tumescence subapically on outer margin (Fig. 72); endosoma as in Chen &amp; Nieser (1993: Fig. 84). Female: body dorsoventrally compressed; sternum 7 large, length along midline about same as length of preceding abdominal sterna combined; posterior sternum 7 with two small and finger-like lobes, separated by wide, shallow, transverse notch (Fig. 73).</p> <p>Size: apterous males: length 6.2–6.9, width 3.05–3.45; apterous females: length 5.9–6.1, width 3.35–3.48.</p> <p>Remarks. Metrocoris obscurus belongs to the M. obscurus species group (sensu Chen &amp; Nieser, 1993) and is the only taxon in this species group. The specimens from Vietnam are slightly larger than the type specimens from Myanmar and China (see Chen &amp; Nieser, 1993).</p> <p>Distribution. Vietnam (first record): Lao Cai, Cao Bang (Fig. 139). Extralimital records: Myanmar: Bumgahtauang-Hpungan; China: Yunnan.</p></div> 	http://treatment.plazi.org/id/03E887F537683F0BFC01FF719617323A	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	A. D., Tran;Polhemus, D. A.	A. D., Tran, Polhemus, D. A. (2017): The genus Metrocoris Mayr, 1865 (Gerromorpha: Gerridae) in Vietnam, with descriptions of five new species. Raffles Bulletin of Zoology 65: 109-149, DOI: http://doi.org/10.5281/zenodo.4502634
03E887F537683F17FC34F93A93A436E1.text	03E887F537683F17FC34F93A93A436E1.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Metrocoris acutus Chen & Nieser 1993	<div><p>Metrocoris acutus Chen &amp; Nieser, 1993</p> <p>(Figs. 14, 15, 37, 74–76)</p> <p>Metrocoris acutus Chen &amp; Nieser, 1993: 32–33, Figs, 88, 95–96, 101–102 (type locality: Konthanthan, Chiang Mai, Thailand); Zettel &amp; Chen, 1996: 152, 176–177 (records from Vietnam).</p> <p>Material examined. VIETNAM: Dien Bien Prov.: 1 female (apt), 3 males (mpt), Na Tau, Nam Rom river, coll. Tran A.D., 25 July 2004, DY0412 (ZRC); 2 males, 4 females (apt), 1 male, 2 females (mpt), Muong Phang, Muong Phang stream, coll. Tran A.D., 26 July 2004, DY0415 (ZRC); 5 males, 5 females (apt), 1 male, 2 females (mpt), Dien Bien Dong, Keo Lom, Huoi stream, coll. Tran A.D., 27 July 2004, DY0417 (ZRC). Lai Chau Prov.: 2 males (mpt), Tam Duong, Ho Thau, stream at Su Thang brigde, km 9 Nat. Road #4D, coll. Tran A.D. et al., 31 May 2013, TAD1324 (ZMHU); 1 female (apt), Muong Te, Nam Khao, Nam Puc, stream by the road from Muong Te town to Pac Ma, ca. 17 km from Muong Te town, coll. Tran A.D. et al., 2 June 2013, TAD1325 (ZMHU); 1 male, 1 female (mpt), Muong Te, Nam Khao, Huoi Dang stream, by the road from Muong Te town to Pac Ma, ca. 21 km from Muong Te town, coll. Tran A.D. et al., 2 June 2013, TAD1326 (ZMHU); 1 male, 5 females (apt), 1 male, 1 female (mpt), Muong Te, Bum Nua, Huoi Hon stream, by the road from Muong Te town to Pa Tan, ca. 10 km from Muong Te town, coll. Tran A.D. et al., 2 June 2013, TAD1327 (ZMHU); 1 male (apt), 2 males, 1 female (mpt), Muong Te, Bum Nua, a stream by the road from Muong Te town to Pa Tan, ca. 13 km from Muong Te town, coll. Tran A.D. et al., 2 June 2013, TAD1328 (ZMHU); 2 males, 3 females (apt), 3 males (mpt), Muong Te, Muong Mo stream, by the road from Muong Te town to Lai Ha, ca. 33 km from Muong Te town, coll. Tran A.D. et al., 3 June 2013, TAD1329 (ZMHU); 2 males (mpt), Muong Te, Muong Mo, Ban 41 stream, by the road from Muong Te town to Lai Ha, ca. 45 km from Muong Te town, coll. Tran A.D. et al., 3 June 2013, TAD1330 (ZMHU); 3 males, 3 females (apt), <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.1925&amp;materialsCitation.latitude=22.147778" title="Search Plazi for locations around (long 103.1925/lat 22.147778)">Nam Na River</a> and Nam Ceung stream trib., 15.5 km N. of Lai Chau, 200 m asl, 22°08′52″N, 103°11′33″E, water temp. 21.5°C (trib.), 11 April 2000, 1000–1300 hrs., CL 4409, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 5 females (apt), 1 male, 1 female (mpt), cascading stream 12 km N. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.191666&amp;materialsCitation.latitude=22.121944" title="Search Plazi for locations around (long 103.191666/lat 22.121944)">Lai Chau</a>, 290 m asl, 22°07′19″N, 103°11′30″E, water temp. 22°C, 11 April 2000, 1345–1600 hrs., CL 4410, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM). Lao Cai Prov.: 2 males, 5 females (apt), 1 female (mpt), Sa Pa, Trung Chai, km 119 Nat. Road #4D, Mong Sen stream, coll. Dinh N.H. et al., 25 April 2011, DNH11.15 (ZMHU); 2 males, 6 females (mpt), Sa Pa, Nam Cang, Nam Cang stream, coll. Dinh N.H. et al., 23 October 2012, DNH12.08 (ZMHU); 1 male, 1 female (apt), Sa Pa, Nam Sai, Seo Nam Sai stream 1, coll. Dinh N.H. et al., 24 October 2012, DNH12.09 (ZMHU); 1 male, 1 female (mpt), Sa Pa, Nam Sai, Seo Nam Sai stream 2, coll. Dinh N.H. et al., 24 October 2012, DNH12.10 (ZMHU); 2 males (apt), 1 female (mpt), Sa Pa, Thanh Phu, Nam Cang stream, coll. Tran A.D. et al., 26 October 2013, TAD1359 (ZMHU); 2 males (apt), Sa Pa, Thanh Phu, near junction of Nam Cang and Muong Hoa streams, coll. Ngo Q.H., 26 October 2013, TAD1360 (ZMHU); 1 male (apt), 1 female (mpt), Sa Pa, Ban Ho, Nam Pu stream (feeder stream of Muong Hoa stream), site 1, at lower section, coll. Tran A.D. et al., 26 October 2013, TAD1361 (ZMHU); 3 males, 4 females (apt), 1 female (mpt), Sa Pa, Trung Chai, km 119 Nat. Road #4D, coll. Ngo Q.H. et al., 28 October 2013, TAD1370 (ZMHU); 7 males, 7 females (apt), 4 females (mpt), rocky river and small trib., 16 km NE. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.8975&amp;materialsCitation.latitude=22.414444" title="Search Plazi for locations around (long 103.8975/lat 22.414444)">Sa Pa on Lao Cai</a> road, 850 m asl, 22°24′52″N, 103°53′51″E, water temp. 19°C (main river), 7 April 2000, 1115–1400 hrs.; 9 April 2000, 1500–1600 hrs., CL 4397, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 12 males, 12 females (apt), 1 female (mpt), small rocky stream 19 km NE. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.916664&amp;materialsCitation.latitude=22.4275" title="Search Plazi for locations around (long 103.916664/lat 22.4275)">Sa Pa on Lao Cai</a> road, 595 m asl, 22°25′39″N, 103°55′00″E, water temp. 20°C, 7 April 2000, 1515–1600 hrs., CL 4399, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 4 males, 6 females (apt), 1 male (mpt), cascading stream 20 km NE. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.92667&amp;materialsCitation.latitude=22.438889" title="Search Plazi for locations around (long 103.92667/lat 22.438889)">Sa Pa on Lao Cai</a> road, 565 m asl [1850 ft], 22°26′20″N, 103°55′36″E, water temp. 19°C, 9 April 2000, 1215–1430 hrs., CL 4406, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM). Ha Giang Prov.: 1 female (apt), Bac Me, Minh Ngoc commune, small stream by Nat’ road 34 ca. 20 km to Bac Me town, coll. Tran A.D. et al., 07 May 2014, TAD1401 (ZMHU); 3 males, 5 females (apt), 1 male, 2 females (mpt), Bac Me, road 176, Minh Son commune, stream at Ban Van bridge, coll. Tran A.D. et al., 07 May 2014, TAD1403 (ZMHU); 1 female (apt), 2 males, 2 females (mpt), Vi Xuyen, Nat’ road 4C, Minh Tan commune, Nam Dieng stream, near bridge, ca. 17.5 km to Ha Giang city, coll. Tran A.D. et al., 09 May 2014, TAD1408 (ZMHU); 2 males, 5 females (apt), 2 males, 3 females (mpt), Bac Quang, km 13 road 177, Tan Lap commune, waterfall &amp; stream, ca. 86 km to Coc Pai town, coll. Tran A.D. et al., 10 May 2014, TAD1410 (ZMHU); 1 female (apt), Hoang Su Phi, Nam Ty commune, bridge at km 34 road 177, waterfall &amp; stream, ca. 65 km to Coc Pai, coll. Tran A.D. et al., 10 May 2014, TAD1411 (ZMHU); 1 female (apt), 3 females (mpt), Xin Man, road 178, feeder stream of Nam Yen river, near bridge ca. 2 km from Coc Pai town, coll. Tran A.D. et al., 11 May 2014, TAD1412 (ZMHU). Cao Bang Prov.: 3 males, 6 females (apt), Le Nin stream at <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=106.05056&amp;materialsCitation.latitude=22.976667" title="Search Plazi for locations around (long 106.05056/lat 22.976667)">Pac Bo cave</a>, 370 m asl, 22°58′36″N, 106°03′02″E, water temp. 18°C, 22 March 2000, CL 4371, coll. J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 2 females (apt), Bao Lac, Dinh Phung commune, near Tung Muu, stream by the Nat’ road 34, coll. Tran A.D. et al., 20 December 2013, TAD1378 (ZMHU); 3 males, 3 females (apt), Bao Lac, Bao Toan commune, Na Roa village, Khuoi Rong stream, feeder of Gam river, coll. Tran A.D. et al., 20 December 2013, TAD1381 (ZMHU); 1 male, 10 females (apt), 1 male (mpt), Bao Lac, near Bao Lam district town, Ban Chim steram, feeder of Gam river, coll. Tran A.D. et al., 20 December 2013, TAD1382 (ZMHU). Bac Kan Prov.: 1 female (apt), Ba Be, Hoang Tri commune, Hoang Tri waterfall, coll. Tran, A.D. et al., 22 August 2012, TAD1218 (ZMHU); 6 males, 6 females (apt), <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=105.56334&amp;materialsCitation.latitude=22.45" title="Search Plazi for locations around (long 105.56334/lat 22.45)">Ba Be N’Park</a>, streams and pools in lower Ba Be Falls area, 140 m asl, 22°27′00″N, 105°33′48″E, water temp. 20.5°C, 20 March 2000, CL 4363, coll. J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 2 males, 5 females (apt), <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=105.57444&amp;materialsCitation.latitude=22.451944" title="Search Plazi for locations around (long 105.57444/lat 22.451944)">Ba Be Nat. Park</a>, spring fed stream nr. Ba Be Falls, 180 m asl, 22°27′07″N, 105°34′28″E, water temp. 19°C, 20 March 2000, CL 4365, coll. J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 3 males, 7 females (apt), 1 female (mpt), <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=105.76833&amp;materialsCitation.latitude=22.418888" title="Search Plazi for locations around (long 105.76833/lat 22.418888)">Ba Be Nat. Park</a>, <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=105.76833&amp;materialsCitation.latitude=22.418888" title="Search Plazi for locations around (long 105.76833/lat 22.418888)">Na Phon river</a> emerging from Pac Ngoi cave on W. side of Ba Be Lake, 175 m asl, 22°25′08″N, 105°46′06″E, water temp. 20.5°C, 21 March 2000, CL 4369, coll. J.T. Polhemus &amp; P. Nguyen (USNM, BPBM). Vinh Phuc Prov.: 8 males, 8 females (apt), small stream nr. entrance to Tam Dao N’Park, NW. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=105.61527&amp;materialsCitation.latitude=21.431389" title="Search Plazi for locations around (long 105.61527/lat 21.431389)">Hanoi</a>, 225 m asl, 21°25′53″N, 105°36′55″E, water temp. 19°C, 19 March 2000,CL 4361, coll. J.T. Polhemus &amp; P. Nguyen (USNM, BPBM). Quang Ninh Prov.: 4 males, 2 females (apt), 1 male (mpt), Van Don, Cai Bau island, Van Yen, Cau Cao stream, coll. Tran A.D., 14 June 2003, TAD0349 (ZRC); 5 females (apt), <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=106.7275&amp;materialsCitation.latitude=21.12889" title="Search Plazi for locations around (long 106.7275/lat 21.12889)">Dong Trieu Range</a>, tributary stream nr. Yen Tú pagoda, 165 m asl, 21°07′44″N, 106°43′39″E, water temp. 17°C, 26 March 2000, CL 4378, coll. J.T. Polhemus &amp; P. Nguyen (USNM, BPBM). Son La Prov.: 1 female (mpt), Moc Chau, 800 m asl, coll. Vásárhelyi, 25–27 May 1986, No. 96 (NHMW); 1 male (apt), Moc Chau, 850 m asl, coll. Vásárhelyi, 26 October 1986, No. 112 (NHMW). Phu Tho Prov.: 3 males, 5 females (apt), 2 females (mpt), Xuan Son N’Park, Lap stream, site 1, at Ngoc waterfall, coll. Tran A.D. et al., 5 June 2013, TAD1331 (ZMHU); 2 males, 1 female (apt), 1 female (mpt), Xuan Son N’Park, Lap stream, site 2, first concrete bridge from Ngoc waterfall, coll. Tran A.D. et al., 5 June 2013, TAD1332 (ZMHU); 1 male, 2 females (apt), 1 female (mpt), Xuan Son N’Park, Lap stream, site 3, second concrete bridge from Ngoc waterfall, coll. Tran A.D. et al., 5 June 2013, TAD1333 (ZMHU); 2 females (apt), Xuan Son N’Park, Kim Thuong, Tan Ong stream, site 1, at Chin Tang waterfall, coll. Tran A.D. et al., 6 June 2013, TAD1334 (ZMHU); 1 male, 2 females (apt), Xuan Son N’Park, Kim Thuong, Tan Ong stream, site 2, ca. 2 km from Chin Tang waterfall, coll. Tran A.D. et al., 6 June 2013, TAD1335 (ZMHU); 1 male (apt), Xuan Son N’Park, Kim Thuong, Tan Ong stream, site 3, ca. 4 km from Chin Tang waterfall, coll. Tran A.D. et al., 6 June 2013, TAD1336 (ZMHU); 1 male, 1 female (mpt), Xuan Son N’Park, Ban Coi, Coi stream, site 1, water from underground, coll. Tran A.D. et al., 7 June 2013, TAD1337 (ZMHU); 1 male, 5 females (apt), 1 male, 1 female (mpt), Xuan Son N’Park, Kim Thuong, Tan Ong stream, site 2, ca. 2 km from Chin Tang waterfall, coll. Tran A.D. et al., 28 August 2013, TAD1341 (ZMHU); 1 male, 1 female (apt), Xuan Son N’Park, Kim Thuong, Tan Ong stream, site 3, ca. 4 km from Chin Tang waterfall, coll. Tran A.D. et al., 28 August 2013, TAD1342 (ZMHU); 5 males, 7 females (apt), Xuan Son N’Park, Dong Son, Than stream, site 1, coll. Tran A.D. et al., 29 August 2013, TAD1346 (ZMHU); 1 female (apt), Xuan Son N’Park, Dong Son, Than stream, site 2, coll. Tran A.D. et al., 29 August 2013, TAD1347 (ZMHU); 1 male, 3 females (apt), Xuan Son N’Park, Lap stream, site 1, at Ngoc waterfall, coll. Tran A.D. et al., 30 August 2013, TAD1352 (ZMHU); 1 male, 1 female (apt), Xuan Son N’Park, Lap stream, site 2, first concrete bridge from Ngoc waterfall, coll. Tran A.D. et al., 30 August 2013, TAD1353 (ZMHU); 2 males (apt), Xuan Son N’Park, Lap stream, site 3, second concrete bridge from Ngoc waterfall, coll. Tran A.D. et al., 30 August 2013, TAD1354 (ZMHU). Hanoi: 3 females (apt), 2 males (mpt), Ba Vi N’Park, Khanh Thuong, Bang stream, 83 m asl, coll. Ngo Q.H. et al., 17 December 2011, TAD1122 (ZMHU); 5 males, 10 females (apt), 2 females (mpt), Khanh Thuong, Mit stream, forest area, 80 m asl, coll. Ngo Q.H. et al., 17 December 2011, TAD1124 (ZMHU); 3 males, 5 females (apt), 5 females (mpt), Minh Quang, stream near by Tan Vien Pagoda, 340 m asl, coll. Ngo Q.H. et al., 17 December 2011, TAD1125 (ZMHU); 2 males (apt), Minh Quang, Cái stream, 65 m asl, coll. Ngo Q.H. et al., 17 December 2011, TAD1126 (ZMHU); 8 males, 11 females (apt), Ba Vi N’Park, Khoang Xanh, Tien stream, 95 m asl, coll. Ngo Q.H. et al., 17 December 2011, TAD1127 (ZMHU); 4 males, 2 females (apt), 3 males, 4 females (mpt), Khanh Thuong, Bang stream, 83 m asl, coll. Ngo Q.H. &amp; Tran A.D., 26 April 2012, TAD1201 (ZMHU); 5 males, 6 females (apt), Khanh Thuong, Mit stream, forest area, 80 m asl, coll. Ngo Q.H. &amp; Tran A.D., 26 April 2012, TAD1203 (ZMHU); 5 males, 10 females (apt), 1 female (mpt), Minh Quang, stream near by Tan Vien Pagoda, 340 m asl, coll. Ngo Q.H. &amp; Tran A.D., 26 April 2012, TAD1206 (ZMHU); 1 male, 1 female (mpt), Minh Quang, Cái stream, 65 m asl, coll. Ngo Q.H. &amp; Tran A.D., 26 April 2012, TAD1207 (ZMHU); 7 males, 1 female (apt), 3 males, 5 females (mpt), Khoang Xanh, Tien stream, 95 m asl, coll. Ngo Q.H. &amp; Tran A.D., 27 April 2012, TAD1208 (ZMHU); 2 males (mpt), Ba Vi N’Park, stream near Coste 400, ca. 550 m asl, coll. Ngo Q.H. &amp; Tran A.D., 27 April 2012, TAD1210 (ZMHU). Hai Duong Prov.: 8 males, 27 females (apt), <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=105.58584&amp;materialsCitation.latitude=21.225555" title="Search Plazi for locations around (long 105.58584/lat 21.225555)">Khe La</a> stream, 22 km N. of Chi Linh, 160 m asl, vic. 21°13′32″N, 105°35′09″E, water temp. 18°C, 25 March 2000, CL 4375, coll. J.T. Polhemus &amp; P. Nguyen (USNM, BPBM). Hoa Binh Prov.: 1 female (apt), Hoa Binh, 100 m, coll. Vásárhelyi, 21 October 1986, No. 88 (NHMW). Ninh Binh Prov.: 2 males, 1 female (apt), 1 male, 1 female (mpt), Cuc Phuong, 400 m asl, coll. Vásárhelyi, 17 October 1986, No. 68 (NHMW). Thanh Hoa Prov.: 10 males, 17 females (apt), 1 female (mpt), Ben En N’Park, Nhu Xuan, Tan Binh, Xuan Ly ranger station, Khe Lo 4 stream, coll. Pham T.D., 26 February 2013, BE1301 (ZMHU); 2 males, 9 females (apt), Ben En N’Park, Nhu Xuan, Tan Binh, stream 300 m behind Xuan Ly ranger station, coll. Pham T.D., 26 February 2013, BE1302 (ZMHU); 2 males, 3 females (apt), Ben En N’Park, Nhu Xuan, Son Binh, Khe Cay Khe stream, site 1, coll. Pham T.D., 01 March 2013, BE1304 (ZMHU); 1 male, 4 females (apt), Ben En N’Park, Nhu Xuan, Son Binh, Khe Cay Khe stream, site 2, 300 m down-stream from site 1, coll. Pham T.D., 01 March 2013, BE1305 (ZMHU); 11 males, 14 females (apt), 1 female (mpt), Ben En N’Park, Nhu Xuan, Son Binh, Khe Trai Cao stream, coll. Pham T.D., 04 March 2013, BE1308 (ZMHU); 1 male (apt), Pu Hu Nature Reserve, Quan Hoa, Hien Chung, Ban Pheo, Pheo stream, coll. Pham T.D., March 2013, PH 1302 (ZMHU); 1 female (apt), Pu Hu Nature Reserve, Quan Hoa, Hien Chung, Ban Pheo, Ham stream, coll. Pham T.D., 09 April 2013, PH 1303 (ZMHU); 4 females (apt), 1 female (mpt), Pu Luong Nature Reserve, Ba Thuoc, Co Lung, Ban Khuyn, Khuyn stream, coll. Pham T.D., 18 March 2013, PL1303 (ZMHU). Nghe An Prov.: 2 males (apt), Pu Mat Nature Reserve, SW.of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=104.800835&amp;materialsCitation.latitude=18.970278" title="Search Plazi for locations around (long 104.800835/lat 18.970278)">Con Cuong</a>, Kem waterfall, 400 m asl, vic. 18°58′13″N, 104°48′03″E, water temp. 22°C, 1 April 2000, CL 4385, coll. J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 6 males, 12 females (apt), 1 male, 2 females (mpt), <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=104.8425&amp;materialsCitation.latitude=18.988333" title="Search Plazi for locations around (long 104.8425/lat 18.988333)">Bac</a> stream, nr. Pu Mat Nature Reserve, 200 m asl, 18°59′18″N, 104°50′33″E, water temp. 24°C, 2 April 2000, CL 4388, coll. J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 1 female (mpt), Pu Mat N’Park, Khe Kem waterfall &amp; stream, site #1, coll. Ngo Q.H., 20 December 2012, NQH1203 (ZMHU); 2 males, 3 females (apt), Pu Mat N’Park, Khe Kem stream, site #2, ca. 300 m downstream from waterfall, coll. Ngo Q.H., 20 December 2012, NQH1204 (ZMHU); 6 males, 7 females (apt), Con Cuong, near Tung Huong, Khe Num stream, coll. Ngo Q.H., 21 December 2012, NQH1211 (ZMHU); 1 male, 3 females (apt), 1 male (mpt), Ky Son, Ta Ca, feeder stream of Loi stream, coll. Tran A.D. &amp; Nguyen V.H., 16 April 2013, TAD1302 (ZMHU); 1 female (apt), Ky Son, Muong Xen, Ta Ca, Hoi Giang stream, coll. Tran A.D., 16 April 2013, TAD1303 (ZMHU); 2 males, 2 females (apt), 2 males (mpt), Pu Mat N’Park, Kem stream, site 2, ca. 500 m from waterfall, coll. Tran A.D. et al., 18 April 2013, TAD1311 (ZMHU); 4 females (mpt), Pu Mat N’Park, Kem stream, site 3, near visitors’ shelter, coll. Tran A.D. et al., 18 April 2013, TAD1312 (ZMHU). Ha Tinh Prov.: 7 males, 13 females (apt), 1 female (mpt), Vu Quang N’Park, Khe Lim waterfall, coll. Tran A.D., 24 April 2003, TAD0304 (ZRC); 5 males, 17 females (apt), 2 females (mpt), Vu Quang N’Park, a small branch of Khe Lim, coll. Tran A.D., 24 April 2003, TAD0305 (ZRC); 1 female (mpt), Vu Quang N’Park, small waterpools near Khe Lim, coll. Tran A.D., 24 April 2003, TAD0306 (ZRC); 6 males, 18 females (apt), 2 males, 4 females (mpt), Vu Quang N’Park, Song Con, old Sao La station, coll. Tran A.D., 25 April 2003, TAD0307a (ZRC); 3 males, 3 females (apt), Vu Quang N’Park, Song Con, old Sao La station, coll. Tran A.D., 25 April 2003, TAD0307b (ZRC).</p> <p>CHINA: Yunnan Prov.: 1 male (apt), Gejiu Pref., 10 km N Gejiu, ca. 1300 m asl, coll. Schönmann &amp; Wang, 22 November 1999, CWBS 398 (NHMW).</p> <p>THAILAND: Mae Hong Son Prov.: 1 male (apt), NW. Thailand, waterfall near Mae Sariang, coll. C.M. Yang &amp; T.B. Lim, 11 September 1998, YCM219 (ZRC); 3 females (apt), NW. Thailand, New waterfall, stream, fast flowing with boulder, coll. C.M. Yang &amp; T.B. Lim, 7 September 1998, YCM203A (ZRC); 1 male, 1 female (apt), Pha Bong, 12 km S. Mae Hong Son, coll. H. Zettel (13a), 12 November 1995 (NHMW). Chiang Mai Prov.: 1 male, 1 female (apt), W. Mae Rim, Mae Sa N’Park, Mae Sa Falls, coll. H. Zettel (2), 30–31 October 1995 (NHMW). Phetchabun Prov.: 1 male, 1 female (apt), 36 km SE. Sila, N Ban Nam Nao, Ban Pala Yai, coll. H. Zettel (27), 25 November 1995 (NHMW).</p> <p>Diagnosis. Male: fore femur incrassate (ratio length/width variable, in apterous males about 2.70–4.02), with a bifid subapical tooth; fore tibia without indentation on inner surface (Figs. 74, 75). Male genitalia moderate in size: pygophore sub-ovate; proctiger elongate; paramere slender, falciform with pointed apex (Fig. 37); endosoma as in Chen &amp; Nieser (1993: Figs. 101, 102). Female: sternum 7 large, constricted laterally, medially produced tongue-like lobe (with diagonal lateral margins) on posterior margin, sometimes directed dorsad, completely enclosing the genitalia (Fig. 76).</p> <p>Size: body length about twice as width: apterous males: length 4.60–6.30, width 2.28–3.14, macropterous males: length 6.40–8.20, width 2.34–2.97; apterous females, length 4.40–5.80, width 2.41–3.14, macropterous males: length 6.20–6.90, width 2.52–2.67.</p> <p>Remarks. Metrocoris acutus belongs to the M. nigrofasciatus species group, as defined by Chen &amp; Nieser (1993), on the basis of the following character states: male fore femur incrassate, ventral surface of apical part indented with a single or bifid sub-apical tooth; paramere slender and curved; female sternum 7 large, with median lobe produced. Two species belonging to the M. nigrofasciatus group are found in Vietnam, M. acutus and M. nigrofascioides. Males of these two species can be separated from each other by the structures of the fore leg, parameres and endosoma. By contrast, the females of the two species are very similar to each other, especially in regard to colour pattern. However, they can be separated by size (the females of M. acutus are slightly larger), shape of the median lobe of sternum 7 (tongue-like in M. acutus, sub-rectangular in M. nigrofascioides), and pubescence on the inner surface of the hind trochanter (more distinct and longer in M. nigrofascioides).</p> <p>Distribution. Vietnam: Dien Bien, Son La, Quang Ninh, Hoa Binh, Ninh Binh, Ha Tinh, Cao Bang (first record), Hai Duong (first record), Thanh Hoa (first record), Nghe An (first record), Lao Cai, Lai Chau, Bac Kan, Vinh Phuc (Fig. 139). Extralimital records: China (Yunnan), Laos (Luang Prabang), Thailand (northern).</p> </div>	http://treatment.plazi.org/id/03E887F537683F17FC34F93A93A436E1	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	A. D., Tran;Polhemus, D. A.	A. D., Tran, Polhemus, D. A. (2017): The genus Metrocoris Mayr, 1865 (Gerromorpha: Gerridae) in Vietnam, with descriptions of five new species. Raffles Bulletin of Zoology 65: 109-149, DOI: http://doi.org/10.5281/zenodo.4502634
03E887F537743F16FF23FD31930132A1.text	03E887F537743F16FF23FD31930132A1.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Metrocoris nigrofascioides Chen & Nieser 1993	<div><p>Metrocoris nigrofascioides Chen &amp; Nieser, 1993</p> <p>(Figs. 16, 17, 38, 77–79)</p> <p>Metrocoris nigrofascioides Chen &amp; Nieser, 1993: 34–35, Figs. 90, 97, 105 (type locality: Fang, Chiang Mai, Thailand); Zettel &amp; Chen, 1996: 152, 177 (records from Vietnam).</p> <p>Material examined. VIETNAM: Thanh Hoa Prov.: 1 male (apt), 1 male, 1 female (mpt), Ben En N’Park, Nhu Xuan, Son Binh, Khe Cay Khe stream, site 1, coll. Pham T.D., 01 March 2013, BE1304 (ZMHU). Quang Binh Prov.: 1 male (apt), Phong Nha, upstream of Thac Xoi waterfall, coll. Tran A.D., 15 July 2004, DY0407 (ZRC); 4 males, 2 females (apt), Phong Nha, a stream 1 km behind Forest Ranger station 4, coll. Tran A.D., 16 July 2004, DY0409 (ZMHU). Da Nang Prov.: 4 males (apt), Ba Na - Nui Chua foothills, Suoi Lanh, coll. Tran A.D. &amp; Tan H.H., 01 March 2005, THH05-25 (ZRC). Kon Tum Prov.: 1 male, 3 females (apt.), stream 2 km inside <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=107.712776&amp;materialsCitation.latitude=14.431945" title="Search Plazi for locations around (long 107.712776/lat 14.431945)">Chu Mom Ray Nature Reserve</a>, 635 m asl, 14°25′55″N, 107°42′46″E, water temp. 21°C, 4 March 2001, CL 4277, coll. J.T. Polhemus &amp; P. Nguyen (USNM); 2 females (apt), stream 63 km NE. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.306114&amp;materialsCitation.latitude=14.603889" title="Search Plazi for locations around (long 108.306114/lat 14.603889)">Kontum on Hwy.</a> 24, 1050 m asl, 14°36′14″N, 108°18′22″E, water temp. 20.5°C, 6 March 2001, CL 4281, coll. J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 4 males, 6 females (apt), 1 male, 3 females (mpt), stream in dry forest hills 29 km NE. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.153336&amp;materialsCitation.latitude=14.450277" title="Search Plazi for locations around (long 108.153336/lat 14.450277)">Kontum on Hwy.</a> 24, 565 m asl, 14°27′01″N, 108°09′12″E, water temp. 20.5°C, 19 March 2001, CL 4284, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM); 1 female (apt), 1–4 m trib. of Ngoc Mi River, ca. 20 km NE. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=107.91111&amp;materialsCitation.latitude=15.139722" title="Search Plazi for locations around (long 107.91111/lat 15.139722)">Ngoc Linh</a>, 980 m asl, 10 Sept. 1998, coll. B. Hubley, D.C. Currie &amp; M. Tseng, ROM 982314, secondary tropical forest, 15°08′23″N, 107°54′40″E (USNM). Gia Lai Prov.: 1 male, 3 females (mpt), 40 km NW. An Khe, <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.5&amp;materialsCitation.latitude=14.166667" title="Search Plazi for locations around (long 108.5/lat 14.166667)">Buon Luoi</a>, 14°10′N 108°30′E, 620–750 m asl, coll. Pacholátko &amp; Dembicky, 28 March–12 April 1995 (NHMW); 5 males, 1 female (apt), 1 female (mpt), Nuoc Stream, 47 km N. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.60472&amp;materialsCitation.latitude=14.238056" title="Search Plazi for locations around (long 108.60472/lat 14.238056)">An Khe</a>, 580 m asl, 14°14′17″N, 108°36′17″E, water temp. 24°C, 23 March 2001, CL 4312, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM). Binh Dinh Prov.: 7 males, 8 females (apt), 1 female (mpt), rocky stream on E. side of An Khe Pass, 19 km E. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.787224&amp;materialsCitation.latitude=13.980556" title="Search Plazi for locations around (long 108.787224/lat 13.980556)">An Khe on Hwy.</a> 19, 115– 200 m asl, 13°58′50″N, 108°47′14″E, water temp. 24°C, 12 March 2001, CL 4291, coll. J.T. Polhemus &amp; P. Nguyen (USNM); 1 male, 3 females (apt), waterfall on E. side of An Khe Pass, 19 km E. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.78001&amp;materialsCitation.latitude=13.973055" title="Search Plazi for locations around (long 108.78001/lat 13.973055)">An Khe on Hwy.</a> 19, 170 m asl, 13°58′23″N, 108°46′48″E, water temp. 24°C, 12 March 2001, CL 4292, coll. J.T. Polhemus &amp; P. Nguyen (USNM, BPBM). Phu Yen Prov.: 1 male (apt), stream in granite hills on N. side of Ca Pass, 29 km S. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=109.39389&amp;materialsCitation.latitude=12.884722" title="Search Plazi for locations around (long 109.39389/lat 12.884722)">Tuy Hoa on Hwy.</a> 1, 60 m asl, 12°53′05″N, 109°23′38″E, water temp. 24°C, 25 March 2001, CL 4316, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM). Lam Dong Prov.: 1 male (apt), Di Linh, 18 km S. of Bao Loc, 600 m asl, coll. Vásárhelyi, 14 October 1988, No. 283 (MTMB). Dong Nai Prov.: 2 males 1 female (apt), Vinh Cuu, Vinh An, Suoi Rang waterfall, coll. Tran A.D., 10 May 2003, TAD0315b (ZRC). Kien Giang Prov., Phu Quoc Island: 1 male (apt), 1 male (mpt), Da Ban stream &amp; waterfall, coll. Tran A.D. &amp; D. Yeo, 29 November 2010, TAD1020 (ZMHU); 2 males, 1 female (apt), 3 males, 3 females (mpt), Tranh stream (middle section &amp; waterfall), coll. Tran A.D., 30 November 2010, TAD1022 (ZMHU).</p> <p>LAOS: Khammouan Prov.: 3 males, 1 female (apt), 1 male, 1 female (mpt), Ban Khoun Ngeun env., N18°07′ E104°29′, alt. 250 m asl, coll. E. Jendek &amp; P. Patcholátko, 4–16, 25–30 November 2000 (NHMW). Saravan Prov.: 1 male, 1 female (apt), Tat Lo Waterfall &amp; Resort, 370 m asl, coll. Schwendinger, 29 December 1996 (NHMW). Vientiane Prov.: 1 male, 6 females (apt), Ban Van Heue, ~ 20 km E. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=102.89667&amp;materialsCitation.latitude=18.295555" title="Search Plazi for locations around (long 102.89667/lat 18.295555)">Phou Khao Khouay</a> park HQ, 1039 m asl, vic. 18°17′44″N, 102°53′48″E, 31 August 1967, coll. J.L. Gressit et al. (BPBM). Luang Prabang Prov.: 2 females (apt), 2 males, 5 females (mpt), Huay La stream, (trib. to Nam Xeuang river), NE. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=102.32916&amp;materialsCitation.latitude=20.060555" title="Search Plazi for locations around (long 102.32916/lat 20.060555)">Ban Pha</a> on road to <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=102.32916&amp;materialsCitation.latitude=20.060555" title="Search Plazi for locations around (long 102.32916/lat 20.060555)">Pak Xeng</a>, 305 m asl, 20°03′38″N, 102°19′45″E, water temp. 26°C, 6 December 2015, 1000–1200 hrs., CL 6026, coll. D.A. Polhemus (BPBM); 5 males, 5 females (apt), 1 male, 2 females (mpt), Huay Sokor stream, (trib. to Nam Xeuang river), NE. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=102.361946&amp;materialsCitation.latitude=20.053055" title="Search Plazi for locations around (long 102.361946/lat 20.053055)">Ban Pha</a> on road to <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=102.361946&amp;materialsCitation.latitude=20.053055" title="Search Plazi for locations around (long 102.361946/lat 20.053055)">Pak Xeng</a>, 350 m asl, 20°03′11″N, 102°21′43″E, water temp. 25°C, 6 December 2015, 1330–1500 hrs., CL 6027, coll. D.A. Polhemus (BPBM); 1 male (apt), Nam Bor River, 1.3 km SW. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=102.47583&amp;materialsCitation.latitude=19.950556" title="Search Plazi for locations around (long 102.47583/lat 19.950556)">Ban Phuong Pao village</a>, 365 m asl [1200 ft], 19°57′02″N, 102°28′33″E, water temp. 21°C, 7 December 2015, 0930–1015 hrs., CL 6028, coll. D.A. Polhemus (BPBM); 1 female (apt), 1 male, 1 female (mpt), small forest tributary to Nam Bor River, 1.4 km SW. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=102.474724&amp;materialsCitation.latitude=19.94972" title="Search Plazi for locations around (long 102.474724/lat 19.94972)">Ban Phuong Pao village</a>, 395 m asl, 19°56′59″N, 102°28′29″E, water temp. 21°C, 7 December 2015, 1030–1100 hrs., CL 6029, coll. D.A. Polhemus (BPBM); 3 males, 2 females (apt), 4 males, 1 female (mpt), rocky stream and small clear tributary at <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=102.293335&amp;materialsCitation.latitude=19.951944" title="Search Plazi for locations around (long 102.293335/lat 19.951944)">Ban Kokvane village</a>, upstream of bridge, 320 m asl [1050 ft], 19°57′07″N, 102°17′36″E, water temp. 23.5°C, 7 December 2015, 1315–1415 hrs., CL 6031, coll. D.A. Polhemus (BPBM); 2 males, 2 females (apt), 1 male (mpt), rocky stream at Tad Thang waterfall area,, 7 km S. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=102.13139&amp;materialsCitation.latitude=19.837502" title="Search Plazi for locations around (long 102.13139/lat 19.837502)">Luang Prabang</a>, 410–440 m asl [1350–1450 ft], 19°50′15″N, 102°07′53″E, water temp. 21°C, 8 December 2015, 0900– 1045 hrs., CL 6032, coll. D.A. Polhemus (BPBM).</p> <p>CAMBODIA: Koh Kong Prov.: 4 males, 1 female (apt), 2 females (mpt), Cardamom Mountains, shaded forest streamlet on road to <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.217224&amp;materialsCitation.latitude=11.600556" title="Search Plazi for locations around (long 103.217224/lat 11.600556)">Tatai Dam</a> overlook, 420 m asl, 11°36′02″N, 103°13′02″E, water temp. 26°C, 30 August 2015, CL 6016, coll. D.A. Polhemus (BPBM, USNM); 3 males, 1 female (mpt), Cardamom Mountains, cascading stream in sandstone bed on road to <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.246666&amp;materialsCitation.latitude=11.596389" title="Search Plazi for locations around (long 103.246666/lat 11.596389)">Tatai Dam</a> overlook, 420 m asl, 11°35′47″N, 103°14′48″E, water temp. 26°C, 30 August 2015, CL 6017, coll. D.A. Polhemus (BPBM, USNM); 2 males, 2 female (apt), Cardamom Mountains, <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.480835&amp;materialsCitation.latitude=11.6258335" title="Search Plazi for locations around (long 103.480835/lat 11.6258335)">Toeuk Noeng River</a>, 165 m asl, 11°37′33″N, 103°28′51″E, water temp. 26°C, 31 August 2015, CL 6019, coll. D.A. Polhemus (BPBM, USNM); 1 male, 4 female (apt), Cardamom Mountains, outflow from ponded stream on road from Koh Kong to <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.17972&amp;materialsCitation.latitude=12.016111" title="Search Plazi for locations around (long 103.17972/lat 12.016111)">Pursat</a>, 540 m asl, 12°00′58″N, 103°10′47″E, water temp. 24.5°C, 1 September 2015, CL 6023, coll. D.A. Polhemus (BPBM, USNM). THAILAND: Chiang Mai Prov.: 1 male (mpt), N. Thailand, 78 km from Chiang Mai, coll. Y.Y. Goh, 12 June 1998, GYY079 (ZRC); 3 males, 4 females (apt), 1 male, 1 female (mpt), NW. Chiang Mai, stream off Pai River, coll. C.M. Yang &amp; T.B. Lim, 08 September 1998, YCM207 (ZRC); 2 males, 2 females (apt), 1 male, 1 female (mpt), W. Mae Rim, Mae Sa N’Park, Mae Sa Falls, coll. H. Zettel (2), 30–31 October 1995 (NHMW). Kamphaeng Phet Prov.: 1 male (mpt), central Thailand, Kamphaeng Phet, side stream to waterfall, coll. C.M. Yang &amp; T.B. Lim, 12 September 1998, YCM223 (ZRC); 1 female (apt), central Thailand, rocky stream, coll. C.M. Yang &amp; T.B. Lim, 12 September 1998, YCM222A (ZRC).</p> <p>Diagnosis. Male: fore femur incrassate (ratio length/width variable, about 3.63–4.61), ventral surface indented subapically, with pointed proximal edge and a large sub-apical tooth, inner surface of fore tibia with broad indentation basally (not obvious in males with more slender fore femur) (Fig. 77). Male genitalia moderate in size: pygophore sub-ovate; proctiger elongate; paramere falciform, apex blunt (Fig. 38); endosoma as in Chen &amp; Nieser (1993: Fig. 105). Female: inner surface of hind trochanter with long hairs (Fig. 78); sternum 7 large, constricted laterally, posteriorly produced median lobe with parallel lateral margins and round posterior margin, sometimes directed dorsad, completely enclosing genitalia (Fig. 79).</p> <p>Size: apterous males: length 4.31–4.95, width 2.11–2.51; apterous females: length 4.02–4.75, width 2.23–2.52.</p> <p>Remarks. See Remarks for M. acutus.</p> <p>Distribution. Vietnam: Thanh Hoa, Quang Binh, Da Nang, Kon Tum, Gia Lai, Binh Dinh, Phu Yen, Lam Dong, Dong Nai, Phu Quoc (Fig. 139). Extralimital records: Myanmar: Hpungan Sadon, Thailand (northern), Laos (first record), Cambodia (first record).</p> </div>	http://treatment.plazi.org/id/03E887F537743F16FF23FD31930132A1	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	A. D., Tran;Polhemus, D. A.	A. D., Tran, Polhemus, D. A. (2017): The genus Metrocoris Mayr, 1865 (Gerromorpha: Gerridae) in Vietnam, with descriptions of five new species. Raffles Bulletin of Zoology 65: 109-149, DOI: http://doi.org/10.5281/zenodo.4502634
03E887F537753F16FF79F8B1961F3160.text	03E887F537753F16FF79F8B1961F3160.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Metrocoris ciliatus den Boer 1965	<div><p>Metrocoris ciliatus den Boer, 1965</p> <p>(Figs. 41, 80–83)</p> <p>Metrocoris ciliatus den Boer, 1965: 23–26, Figs. 36, 41–43, 45 (type locality: Dawna Hills, Myanmar); Chen &amp; Nieser, 1993: 54–57 (redescription, records from Thailand).</p> <p>Material examined. VIETNAM: Lai Chau Prov.: 1 male (mpt), Muong Te, Muong Mo stream, by the road from Muong Te town to Lai Ha, ca. 33 km from Muong Te town, coll. Tran A.D. et al., 3 June 2013, TAD1329 (ZMHU).</p> <p>CHINA: Yunnan Prov.: 5 males, 5 females (apt), 6 males, 7 females (mpt), Xishuangbanna, Mengyang, Mengang River: forest stream, coll. Cheng L. et al., 18–31 May 2000, LC019 (ZRC); 1 male, 2 females (apt), 1 male (mpt), ZRC.6.22062, Xishuangbanna, Jinghong, Banna N’Park, 850 m asl, small forest stream, coll. Yang C.M. &amp; P. Chew, 28 May–12 June 2002, YCM0327 (ZRC).</p> <p>Diagnosis. Both sexes: fore femur slender (ratio length/width: males ca. 8.5, females ca. 8.0), sub-apically constricted, ventral surface with sub-apical elevation (Fig. 80). Male: pro-, meso- and metanotum, pleura, and abdominal tergum 1 with scattered black setae; genitalia small, abdominal segment 8 slightly shorter than wide on ventral, pygophore and proctiger simple; paramere falciform, short, with curvature at distal half, apex blunt (Figs. 41, 81, 82); endosoma as in Fig. 83. Female: thoracic segments without black setae; sternum 7 about as long as sterna 4–6 together, posterior margin broadly rounded (modified from Chen &amp; Nieser, 1993).</p> <p>Size (after Chen &amp; Nieser, 1993): apterous males: length 4.8, width 2.5; apterous females: length 5.0, width 2.7 (specimen from Vietnam, macropterous male: length 6.64, width 2.53).</p> <p>Remarks. This is the first record of this taxon in Vietnam. For comparative notes, see Remarks under M. inthanon.</p> <p>Distribution. Vietnam (first record): Lai Chau (Fig. 140). Extralimital records: Myanmar: Dawna Hills; Thailand: Chiang Mai; China: Yunnan.</p></div> 	http://treatment.plazi.org/id/03E887F537753F16FF79F8B1961F3160	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	A. D., Tran;Polhemus, D. A.	A. D., Tran, Polhemus, D. A. (2017): The genus Metrocoris Mayr, 1865 (Gerromorpha: Gerridae) in Vietnam, with descriptions of five new species. Raffles Bulletin of Zoology 65: 109-149, DOI: http://doi.org/10.5281/zenodo.4502634
03E887F537753F10FCE9FAB1902E338A.text	03E887F537753F10FCE9FAB1902E338A.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Metrocoris inthanon Chen & Nieser 1993	<div><p>Metrocoris inthanon Chen &amp; Nieser, 1993</p> <p>(Figs. 18, 19, 84, 85, 91–93)</p> <p>Metrocoris ciliatus den Boer, 1965: 23–26, Figs. 36, 40, 46 (female paratypes from Laos).</p> <p>Metrocoris inthanon Chen &amp; Nieser, 1993: 57–59, Figs. 154, 162, 170 (type locality: Doi Inthanon, Chiang Mai, Thailand); Zettel &amp; Chen, 1996: 152, 177 (records from Vietnam).</p> <p>Material examined. VIETNAM: Phu Tho Prov.: 1 male, 3 females (apt), Xuan Son N’Park, Kim Thuong, Tan Ong stream, site 3, ca. 4 km from Chin Tang waterfall, coll. Tran A.D. et al., 6 June 2013, TAD1336 (ZMHU); 1 male, 1 female (apt), Xuan Son N’Park, Kim Thuong, Tan Ong stream, site 3, ca. 4 km from Chin Tang waterfall, coll. Tran A.D. et al., 28 August 2013, TAD1342 (ZMHU). Thanh Hoa Prov.: 1 female (apt), Pu Luong Nature Reserve, Ba Thuoc, Co Lung, Ban Khuyn, Khuyn stream, coll. Pham T.D., 18 March 2013, PL1303 (ZMHU). Nghe An Prov.: 1 male, 3 females (apt), Pu Mat N’Park, Khe Kem waterfall &amp; stream, site #1, coll. Ngo Q.H., 20 December 2012, NQH1203 (ZMHU); 1 male (apt), Pu Mat N’Park, Khe Kem stream, site #2, ca. 300 m downstream from waterfall, coll. Ngo Q.H., 20 December 2012, NQH1204 (ZMHU); 1 male, 1 female, Pu Mat N’Park, Khe Kem stream, site #3, coll. Ngo Q.H., 20 December 2012, NQH1205 (ZMHU); 1 male, 1 female (apt), Pu Mat N’Park, Khe Kem stream, site #4, coll. Ngo Q.H., 20 December 2012, NQH1206 (ZMHU); 3 males, 1 female (apt), Pu Mat Nature Reserve, SW. of Con Cuong, <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=104.800835&amp;materialsCitation.latitude=18.970278" title="Search Plazi for locations around (long 104.800835/lat 18.970278)">Kem</a> waterfall, 400 m asl, vic. 18°58′13″N, 104°48′03″E, water temp. 22°C, 1 April 2000, CL 4385, coll. J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 4 males, 6 females (apt), Bac stream, nr. <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=104.8425&amp;materialsCitation.latitude=18.988333" title="Search Plazi for locations around (long 104.8425/lat 18.988333)">Pu Mat Nature Reserve</a>, 200 m asl, vic. 18°59′18″N, 104°50′33″E, water temp. 24°C, 2 April 2000, CL 4388, coll. J.T. Polhemus &amp; P. Nguyen (USNM, BPBM). Ha Tinh Prov.: 1 male, 3 females (apt), 1 female (mpt), Vu Quang N’Park, Song Con, old Sao La station, coll. Tran A.D., 25 April 2003, TAD0307a (ZRC). Quang Binh Prov.: 1 male, 2 females (apt), Phong Nha N’Park, Cha Noi, Khe Khai, coll. Hoang Q.K. &amp; Dinh V.K, 5 August 2002, VNQB0201 (ZRC); 1 male (mpt), Phong Nha N’Park, Khe Gat, Cha Noi, coll. Hoang Q.K. &amp; Dinh V.K., 4 April 2003, VNQB0301 (ZRC); 4 males, 2 females (apt), 1 female (mpt), Phong Nha, Cha Noi, Khe Con Khai stream, coll. Tran A.D., 13 July 2004, DY0402 (ZRC); 1 male (apt), Phong Nha, a stream near Forest Ranger station 37, coll. Tran A.D., 15 July 2004, DY0405 (ZRC); 2 males, 3 females (apt), Phong Nha, Chay stream, coll. Tran A.D., 17 July 2004, DY0410 (ZRC). Gia Lai Prov.: 15 males, 15 females (apt), 40 km NW. An Khe, <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.5&amp;materialsCitation.latitude=14.166667" title="Search Plazi for locations around (long 108.5/lat 14.166667)">Buon Luoi</a>, 14°10′N, 108°30′E, 620–750 m asl, coll. Pacholátko &amp; Dembicky, 28 March–12 April 1995 (NHMW, ZRC); 19 males, 20 females (apt), 3 females (mpt), Tral Stream, 60 km N. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.58028&amp;materialsCitation.latitude=14.341111" title="Search Plazi for locations around (long 108.58028/lat 14.341111)">An Khe</a>, 700 m asl, 14°20′28″N, 108°34′49″E, water temp. 23.5°C, 22 March 2001, CL 4309, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 2 females (mpt), small stream 2 km N. of Tram Lap along forest road, 19 June 1996, ROM-961066, 14°26′N, 108°33′E, primary rainforest, 900 m asl, coll. B. Hulbey (USNM). Ninh Thuan Prov.: 1 female (apt), Nui Chua N’Park, suoi Lo O, coll. Quang N.V., 26 June 2004, NC-03 (ZRC); 1 female (apt), Nui Chua N’Park, unknown location, coll. Quang N.V., 26 June 2004, NC-15 (ZRC).</p> <p>LAOS: Champasak Prov.: 5 females (apt), Bolavens plateau E. Pakse, 50 km E. Muang Paksong, 700 m asl, coll. Schillhammer (9), 27 May 1996 (NHMW). Vientiane Prov.: 2 males, 3 females (apt), Ban Van Heue, ~ 20 km E. of Phou Khao Khouay park HQ, 1039 m asl, vic. 18°17′44″N, 102°53′48″E, 29 March 1966, coll. J.L. Gressit et al. (BPBM). THAILAND: Mae Hong Son Prov.: 3 males, 2 females (apt), NW. Thailand, waterfall near Mae Sariang, coll. C.M. Yang &amp; T.B. Lim, 11 September 1998, YCM219 (ZRC).</p> <p>Diagnosis. Dorsum with extensive dark markings. Both male and female with dense black setae on all thoracic pleura. Male: fore femur slender, not modified (Fig. 84). Male genitalia moderate in size: tergum 8 with median notch on posterior margin; pygophore sub-ovate; proctiger elongate; paramere curved with distal part slightly broad and apex blunt (Figs. 91–93); endosoma as in Chen &amp; Nieser (1993: 170). Female: sternum 7 large, not constricted laterally, posterior margin slightly produced (Fig. 85).</p> <p>Size: apterous males: length 4.70–5.40, width 2.54–2.84, macropterous males: length 7.10, width 2.81; apterous females: length 4.90–5.60, width 2.64–2.97, macropterous females: length 5.20–5.50 (wings broken halfway), width 2.81–2.90.</p></div> 	http://treatment.plazi.org/id/03E887F537753F10FCE9FAB1902E338A	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	A. D., Tran;Polhemus, D. A.	A. D., Tran, Polhemus, D. A. (2017): The genus Metrocoris Mayr, 1865 (Gerromorpha: Gerridae) in Vietnam, with descriptions of five new species. Raffles Bulletin of Zoology 65: 109-149, DOI: http://doi.org/10.5281/zenodo.4502634
03E887F537733F13FCFBFB3197DD3721.text	03E887F537733F13FCFBFB3197DD3721.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Metrocoris triangulatus Zettel & Chen 1996	<div><p>Metrocoris triangulatus Zettel &amp; Chen, 1996</p> <p>(Figs. 22, 23, 40, 86–89)</p> <p>Metrocoris triangulatus Zettel &amp; Chen, 1996: 152, 177–178, Figs. 48–52 (type locality: Vietnam, An Khe – Buon Luoi).</p> <p>Material examined. Holotype (apterous male), VIETNAM, Gia Lai Prov.: “ 40km NW An Khe, <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.5&amp;materialsCitation.latitude=14.166667" title="Search Plazi for locations around (long 108.5/lat 14.166667)">Buon Luoi</a>, 14°10′N, 108°30′E, 620–750 m, 28.3. – 12.4.1995, leg. Pacholátko &amp; Dembicky” (NHMW). Paratype: VIETNAM: 1 female (apt), same locality label as holotype (NHMW).</p> <p>Others: VIETNAM: Thanh Hoa Prov.: 1 male, 1 female (apt), Ben En N’Park, Nhu Xuan, Xuan Quy, Song Chang ranger station, Khe Khoanh 2 stream, coll. Pham T.D., 11 March 2013, BE1310 (ZMHU); 1 female (mpt), Pu Hu Nature Reserve, Quan Hoa, Hien Chung, Ban Pheo, Ham stream, coll. Pham T.D., 09 April 2013, PH 1303 (ZMHU). Da Nang Prov.: 12 males, 7 females (apt), 1 male, 3 females (mpt), Ba Na - Nui Chua, Suoi Cat Lon, 700 m asl, coll. Tran A.D. &amp; Tan H.H., 28 February 2005, THH05-19 (NHMW, ZMHU, ZRC). Kon Tum Prov.: 11 males, 47 females (apt), small stream 60 km NE. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.29694&amp;materialsCitation.latitude=14.595278" title="Search Plazi for locations around (long 108.29694/lat 14.595278)">Kontum on Hwy.</a> 24, 1035 m asl, 14°35′43″N, 108°17′49″E, water temp. 18°C, 6 March 2001, CL 4280, coll. J.T. Polhemus &amp; P. Nguyen (USNM, BPBM). Gia Lai Prov.: 2 males, 6 females (apt), 1 male (mpt), Tral Stream, 60 km N. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.58028&amp;materialsCitation.latitude=14.341111" title="Search Plazi for locations around (long 108.58028/lat 14.341111)">An Khe</a>, 700 m asl, 14°20′28″N, 108°34′49″E, water temp. 23.5°C, 22 March 2001, CL 4309, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 4 males, 17 females (apt), 2 females (mpt), small hill stream in primary forest, 68 km N. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.549164&amp;materialsCitation.latitude=14.347777" title="Search Plazi for locations around (long 108.549164/lat 14.347777)">An Khe</a>, 840 m asl, 14°20′52″N, 108°32′57″E, water temp. 21°C, 22 March 2001, CL 4311, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 1 male, 1 wingless female (apt), small stream 2 km N. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.55&amp;materialsCitation.latitude=14.433333" title="Search Plazi for locations around (long 108.55/lat 14.433333)">Tram Lap</a> along forest road, 19 June 1996, ROM-961066, 14°26′N, 108°33′E, primary rainforest, 900 m asl, coll. B. Hulbey (USNM).</p> <p>Diagnosis. Body dorso-ventrally compressed. Male: fore femur slender, not modified (Fig. 86); pro-, meso-, metapleuron, meso-, metanotum and abdominal tergum 1 with black setae. Male genitalia small: pygophore short, sub-ovate on ventral view and directed dorsad on lateral view; paramere curved, proximal part broader than distal part, apex narrowly rounded (Figs. 40, 87); endosoma as in Figs. 88, 89. Female: thoracic segments without black setae; sternum 7 large, about as long as previous sterna together, posterior margin broad, slightly arched (Fig. 90).</p> <p>Size: apterous males: length 5.40–6.30 (holotype 6.30), width 3.38–3.50 (holotype 3.50), macropterous males: length 5.20 (wings broken), width 3.04; apterous females: length 4.80–5.00, width 3.20–3.33, macropterous females: length 6.60–6.90, width 3.04–3.10.</p> <p>Additional description of macropterous morph. Colour: Dorsal head yellow with two small brown spots on the interocular area (similar to apterous form). Pronotum mainly yellow with brown markings: anterior margin black, a pair of brown sub-lateral stripes slender, confluent with a brown median stripe anteriorly and posteriorly, posterior margin from humeri to apex light yellow. Wings brownish, anterior margin with dense black hairs. Colour of antenna and legs similar to apterous form.</p> <p>Macropterous male: Head width 1.51, interocular width 0.51, eye size 0.75. Lengths of antennal segments: 2.57: 1.17: 0.89: 0.70. Pronotum length 3.00, width 2.35, apex of pronotal lobe round. Lengths of leg segments (femur: tibia: tarsus 1 + 2): fore leg: 2.35: 2.30: 0.75; middle leg: 6.50: 5.30: 1.98; hind leg: 6.70: 3.82: 0.57. Other structural characteristics as in apterous male.</p> <p>Macropterous female: Head width 1.49, interocular width 0.57, eye size 0.73. Lengths of antennal segments: 1.76: 0.87: 0.82: 0.67. Pronotum length 2.81, width 2.28, apex of pronotal lobe round. Lengths of leg segments: fore leg: 1.80: 1.94: 0.70; middle leg: 5.60: 4.41: 1.84; hind leg: 5.60: 3.33: 0.56. Other structural characteristics as in apterous female.</p> <p>Remarks. Zettel &amp; Chen (1996) discussed the similarity of M. triangulatus with other species that possess pleural black setae, i.e., species of the M. ciliatus group (sensu Chen &amp; Nieser, 1993) and the M. philippiensis group (sensu Chen &amp; Nieser, 1993, including M. sunda D. Polhemus and M. tigrinus D. Polhemus). However, the form of the male parameres (short and only slightly curved) and the structure of endosoma sclerites of M. sunda and M. tigrinus clearly separate them from the M. ciliatus group. Zettel &amp; Chen (1996) also noted that M. triangulatus was also relatively similar to M. tenuicornis because both species have similar leg structures (fore femur slender, middle and hind legs very long), and small genital segments. However, M. triangulatus can be separated from the latter by the black setae on the pleura (in males), the shape of male paramere and the shape of sternum 7 in the female.</p> <p>Metrocoris triangulatus matches all diagnostic characteristics of the M. ciliatus group (see Remarks for M. inthanon), particularly the presence of black pleural setae in males and the shape of female sternum 7, thus it can be placed in this species group. Metrocoris triangulatus differs from other species in the M. ciliatus group by the shape of body, the very small genital segments, and the shape of the male paramere. For further comparisons, see Remarks under M. sicilis, new species.</p> <p>Distribution. Vietnam: Thanh Hoa (first record), Kon Tum (first record), Da Nang (first record), Gia Lai (Fig. 140).</p></div> 	http://treatment.plazi.org/id/03E887F537733F13FCFBFB3197DD3721	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	A. D., Tran;Polhemus, D. A.	A. D., Tran, Polhemus, D. A. (2017): The genus Metrocoris Mayr, 1865 (Gerromorpha: Gerridae) in Vietnam, with descriptions of five new species. Raffles Bulletin of Zoology 65: 109-149, DOI: http://doi.org/10.5281/zenodo.4502634
03E887F537703F1DFC4CFCF197C43761.text	03E887F537703F1DFC4CFCF197C43761.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Metrocoris sicilis A.D. & Polhemus 2017	<div><p>Metrocoris sicilis, new species</p> <p>(Figs. 20, 21, 39, 94–99)</p> <p>Material examined. Holotype (apterous male) and allotype (apterous female): VIETNAM: Hanoi, Ba Vi N’Park, stream near Coste 400, ca. 550 m asl, coll. Ngo Q.H. et al., 16 December 2011, TAD1120 (ZMHU).</p> <p>Paratypes: VIETNAM: Hanoi: 2 males, 6 females (apt), same locality data as Holotype (ZMHU); 2 males, 2 females (apt), Ba Vi N’Park, small creek by main road to summit, ca. 9.5 km from park head quarter, ca. 600 m asl, coll. Tran A.D., 11 June 2010, TAD1014 (NHMW, ZRC); 1 male, 1 female (apt), 1 male (mpt), Ba Vi N’Park, stream near Coste 400, ca. 550 m asl, coll. Ngo Q.H. &amp; Tran A.D., 27 April 2012, TAD1210 (ZMHU); 3 males, 12 females (apt), <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=105.35445&amp;materialsCitation.latitude=21.058887" title="Search Plazi for locations around (long 105.35445/lat 21.058887)">Ba Vi N’Park</a>, nr. Son Tay, W. of Ha Noi, third small stream on lower road, 625 m asl, vic. 21°03′32″N, 105°21′16″E, water temp. 18.5°C, 4 April 2000, CL 4393, coll. J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 3 males, 2 females (apt), <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=105.35361&amp;materialsCitation.latitude=21.058887" title="Search Plazi for locations around (long 105.35361/lat 21.058887)">Ba Vi N’Park</a>, nr. Son Tay, W. of Hanoi, second small stream on lower road, 615 m asl, 21°03′32″N, 105°21′13″E, water temp. 18°C, 4 April 2000, CL 4392, coll. J.T. Polhemus &amp; P. Nguyen (USNM, BPBM). Phu Tho Prov.: 1 male, 1 female (apt), Xuan Son N’Park, Kim Thuong, Tan Ong stream, site 3, ca. 4 km from Chin Tang waterfall, coll. Tran A.D. et al., 28 August 2013, TAD1342 (ZMHU).</p> <p>Diagnosis. Both sexes: body dorso-ventrally compressed (more conspicuous in females); fore femur slender (ratio length/width: males, 7.43–8.44; females, 6.44–7.42), subapically constricted, ventral surface with sub-apical elevation (more prominent in males) (Fig. 95). Male: antennae with dense hairs along segments 1–3 (Fig. 94); pro-, meso- and metanotum, pleura, and abdominal tergum 1 with scattered black setae; genitalia small, abdominal segment 8 short, pygophore and proctiger simple, longer than wide; paramere long, falciform, curved dorsad at distal one-third, apex broadly rounded (Figs. 39, 96); endosoma dorsal sclerite long, recurved and expanded apically, apical accessory sclerite distinctly visible, lateral sclerite slender and short, two pairs of thin accessory lateral sclerites present, ventral sclerite short (Figs. 97, 98). Female: thoracic segments without black setae; sternum 7 large, about as long as previous sterna together, posterior margin narrow, straight (Fig. 99).</p> <p>Description. Size: apterous males: length 5.43–6.00 (holotype: 5.13), width 3.09–3.52 (holotype: 2.98); macropterous male: length excluding wings 5.13 (including wings 7.28), width 3.09; apterous females: length 4.63–5.25 (allotype: 5.00), width 2.85–3.45(allotype: 3.16).</p> <p>Colour (Figs. 20, 21). Apterous morph: Interocular area with light brown mark or without dark mark. Antenna: segment 1 yellowish at proximal part and brown at distal part, segments 2–4 light brown to dark brown. Dorsum of thorax yellowish with usually slender blackish markings. Pronotum with median black T-shaped mark at anterior margin and confluent with two dark brown or black marks near anterolateral margin. Mesonotum: black mark on anterior margin connected with lateral stripes and median longitudinal stripe; lateral stripes running towards but not reaching posterior margin; sublateral stripes usually confluent with posterolateral marks; mesopleura with a longitudinal light brown stripe on each side. Metanotum with black mark running along anterior and lateral margins, confluent with medial longitudinal mark and metacetabular stripes, bordering broad yellowish background; metacetabular stripes black, running throughout its length. Fore femur with apical dark ring and a longitudinal mark on external side connected with ring; fore tibia and tarsus brown or dark brown. Middle and hind legs: femora mostly yellow, usually with distal part brown; tibiae and tarsi dark brown. Abdomen mainly blackish dorsally, tergum 1 with one broad yellowish mark running across width of tergum; terga 3–7: posterior part with yellow marks medially. Venter bright yellowish. Macropterous morph: Pronotum with dark mark on anterior margin, confluent with the median longitudinal stripe, but not connected with dark mark on lateral margin between anterior corner and humeri; two light brown sublateral marks running toward apex of protonal lobe but not confluent with the median stripe; posterior margin between humeri and apex light yellowish. Fore wings mainly dark brown, anterior margin yellowish, posterior part of wings light brown.</p> <p>Apterous male (holotype): Head width 1.58; interocular width 0.59; eye size 0.81. Lengths of antennal segments 1–4: 3.13: 1.35: 0.99: 0.76. Pronotum length 0.38. Mesonotum length 1.53. Lengths of leg segments: fore leg: 2.60: 2.35: 0.14: 0.76; middle leg: 7.15: 5.75: 2.13: 032; hind leg: 7.15: 4.28: 0.32: 0.38. Fore femur slender, width of femur: 0.35, ratio length/width: 7.43; other characteristics of fore femur as in Diagnosis above. Abdomen length on ventral view: 1.12, pregenital length 0.54; sternum 7 slightly longer than sterna 5 and 6 combined, length 0.16. Genitalia of male: segment 8 short, length 0.27, width 0.63; characteristics of pygophore, proctiger, paramere, and endosoma as in Diagnosis above.</p> <p>Apterous female (allotype): Head width 1.52; interocular width 0.54; eye size 0.77. Lengths of antennal segments 1–4: 2.05: 0.97: 0.88: 0.73. Pronotum length 0.38. Mesonotum length 1.44. Lengths of leg segments: fore leg: 2.19: 1.95: 0.13: 0.63; middle leg: 6.15: 4.50: 1.86: 0.27; hind leg: 6.15: 3.48: 0.27: 0.35. Fore femur slender, width 0.34, ratio length/width: 6.44. Abdominal venter length 1.23, length of tergum 7: 0.23, length of sternum 7: 0.63. Shape of sternum 7: see Diagnosis above. Connexival margin with long hairs.</p> <p>Macropterous male: Head width 1.62, interocular width 0.63, eye size 0.77. Lengths of antennal segments 1–4: 2.97: 1.37: 0.99: 0.82. Pronotum: apex of pronotal lobe rounded, median length 2.91, humeral width 2.50. Fore wing length 5.5. Lengths of leg segments: fore leg: 2.72: 2.44: 0.17: 0.81; middle leg: 7.10: 5.56: 2.20: 0.34; hind leg: 6.90: 4.30: 0.33: 0.40. Fore femur slender, width 0.38, ratio length/width: 7.16. Abdomen length on ventral view: 1.14, pregenital length 0.50; sternum 7 slightly longer than sterna 5 and 6 combined, length 0.17. Other characteristics as in apterous males.</p> <p>Macropterous female unknown.</p> <p>Remarks. Metrocoris sicilis, new species, clearly belongs to the M. ciliatus group (sensu Chen &amp; Nieser, 1993). It differs from other species in this group by the combination of following characteristics: dense hairs on antennal segments 1–3 of the male; both males and females with the fore femur sub-apically constricted, and its ventral surface with a sub-apical elevation; longer, sickle-shaped parameres; and the shape of sternum 7 of females. It is most similar to M. triangulatus due to triangular shape of body, but can be separated from the latter by the characteristics above.</p> <p>To date, four species belonging to the M. ciliatus species group have been found in Vietnam: M. ciliatus, M. inthanon, M. triangulatus, and M. sicilis new species. Among these, two species, M. sicilis and M. triangulatus, are most closely related to each other, due to the triangular appearance of the body, the dorso-ventrally compressed body, the structure of the endosoma, and the general shape of sternum 7 in the female. Metrocoris sicilis can be easily separated from M. triangulatus by having the fore femur of both sexes with a sub-apical elevation on the ventral surface, antennal segments 1–3 of the male with dense and long hairs, the genitalia relatively larger, and the male paramere longer, with a broadly rounded apex. In M. triangulatus, the fore femur of both sexes is simple, without a sub-apical elevation on the ventral surface, the antenna of the male has only a dense pilosity of shorter hairs on segments 2 and 3, the genitalia are small, and the paramere is short, tapering towards a narrow apex.</p> <p>Etymology. The word “ sicilis ” in Latin means sickle (see Brown, 1956). The species epithet refers to the sickle-shaped paramere, and is used as a noun in apposition.</p> <p>Distribution. Vietnam: Hanoi (Ba Vi), Phu Tho (Xuan Son) (Fig. 140).</p> <p>Habitats. This new species was found on forest streams.</p></div> 	http://treatment.plazi.org/id/03E887F537703F1DFC4CFCF197C43761	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	A. D., Tran;Polhemus, D. A.	A. D., Tran, Polhemus, D. A. (2017): The genus Metrocoris Mayr, 1865 (Gerromorpha: Gerridae) in Vietnam, with descriptions of five new species. Raffles Bulletin of Zoology 65: 109-149, DOI: http://doi.org/10.5281/zenodo.4502634
03E887F5377E3F1FFC2DFCF1919A3101.text	03E887F5377E3F1FFC2DFCF1919A3101.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Metrocoris nigriventris A.D. & Polhemus 2017	<div><p>Metrocoris nigriventris, new species</p> <p>(Figs. 24, 25, 42, 100–107)</p> <p>Material examined. Holotype (apterous male) and allotype (apterous female): VIETNAM, Lao Cai Prov., Sa Pa, Thanh Phu, near junction of Nam Cang and Muong Hoa streams, coll. Dinh N.H. et al., 23 October 2012, DNH12.06 (ZMHU).</p> <p>Paratypes: VIETNAM: Lao Cai Prov.: 1 male, 3 females (apt), same locality data as holotype (ZMHU); 1 male (apt), Sa Pa, Ban Ho, Nam Pu stream 2, coll. Dinh N.H. et al., 22 October 2012, DNH12.02 (ZRC); 1 female (apt), Sa Pa, Seo Trung Ho stream, coll. Dinh N.H. et al., 22 October 2012, DNH12.05 (ZRC); 1 male (apt), Sa Pa, Nam Cang, Nam Cang stream, coll. Dinh N.H. et al., 23 October 2012, DNH12.08 (ZMHU); 1 female (apt), Sa Pa, Nam Sai, Seo Nam Sai stream 1, coll. Dinh N.H. et al., 24 October 2012, DNH12.09 (ZMHU); 3 males, 2 females (apt), rocky river and tributary 7 km NE. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.87112&amp;materialsCitation.latitude=22.371944" title="Search Plazi for locations around (long 103.87112/lat 22.371944)">Sa Pa on Lao Cai</a> road, 1220 m asl, 22°22′19″N, 103°52′16″E, water temp. 17°C, 7 April 2000, 0830–1000 hrs., CL 4395, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 5 males, 1 females (apt), 1 male (mpt), rocky river and small trib., 16 km NE. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.8975&amp;materialsCitation.latitude=22.414444" title="Search Plazi for locations around (long 103.8975/lat 22.414444)">Sa Pa on Lao Cai</a> road, 850 m asl, 22°24′52″N, 103°53′51″E, water temp. 19°C (main river), 7 April 2000, 1115–1400 hrs.; 9 April 2000, 1500–1600 hrs., CL 4397, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 4 males, 2 females (apt), 1 female (mpt), small rocky stream 19 km NE. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.916664&amp;materialsCitation.latitude=22.4275" title="Search Plazi for locations around (long 103.916664/lat 22.4275)">Sa Pa on Lao Cai</a> road, 595 m asl, 22°25′39″N, 103°55′00″E, water temp. 20°C, 7 April 2000, 1515–1600 hrs., CL 4399, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM); 5 males, 3 females (apt), cascading stream 20 km NE. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.92667&amp;materialsCitation.latitude=22.438889" title="Search Plazi for locations around (long 103.92667/lat 22.438889)">Sa Pa on Lao Cai</a> road, 565 m asl, 22°26′20″N, 103°55′36″E, water temp. 19°C, 9 April 2000, 1215–1430 hrs., CL 4406, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM). Lai Chau Prov.: 2 males, 3 females (apt), 3 males (mpt), cascading stream 12 km N. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.191666&amp;materialsCitation.latitude=22.121944" title="Search Plazi for locations around (long 103.191666/lat 22.121944)">Lai Chau</a>, 290 m asl, 22°07′19″N, 103°11′30″E, water temp. 22°C, 11 April 2000, 1345–1600 hrs., CL 4410, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM). Phu Tho Prov.: 1 male (apt), Xuan Son N’Park, Lap stream, site 1, at Ngoc waterfall, coll. Nguyen T.S. et al., 27 August 2014, TS1409 (ZMHU); 1 male (mpt), Xuan Son N’Park, Lap stream, site 1, at Ngoc waterfall, coll. Nguyen T.S. et al., 23 May 2015, TS1511 (ZMHU).</p> <p>Diagnosis. Both sexes: body sub-ovate, ventral surface with distinct dark marks; fore femur relatively short, about subequal to length of mesosternum) slender (ratio length/ width: males, 5.12–6.40; females, 6.34–6.98); in males, proximal half of fore femur about as wide as distal half, ventral surface slightly notched near the middle (Fig. 100), pilosity denser and longer at proximal half (in females, fore femur simple). Male: genitalia of medium size, abdominal segment 8 longer than wide and clearly longer than sternum 7; pygophore simple, on ventral view apex of pygophore straight, postero-lateral surface covered with long yellowish hairs; proctiger simple, lateral margins almost parallel, with long hairs on lateral margins; paramere not extending beyond genital segment, hook-shaped, curved dorsad at distal one-third, with apex projected outwards and anteriorly (Figs. 101–103); endosoma (Figs. 104, 105): dorsal sclerite long and recurved proximally, apical accessory sclerite large but weakly sclerotised, lateral sclerite broad and short, thin accessory lateral sclerite present. Female: hind trochanter produced posteriorly, forming a small process with some long hairs (Fig. 106); abdomen shortened, tip of abdomen barely surpassing apex of hind coxa; sternum 7 large, clearly longer than previous sterna together, constricted laterally, posterior part producing a median lobe with rounded apical margin, directed dorsad, and completely enclosing genitalia on ventral view (Fig. 107).</p> <p>Description. Size: apterous males: length 4.75–5.31 (holotype 5.13), width 2.25–2.63 (holotype 2.41), macropterous males: length 6.00–6.45, width 2.22–2.45; apterous females: length 4.34–5.19 (allotype 4.70), width 2.36–2.66 (allotype 2.45), macropterous females: length 6.80, width 2.50.</p> <p>Colour (Figs. 24, 25): Apterous morph: Interocular area with dark brown mark medially. Antenna: segment 1 yellowish at proximal half and brown at distal half; segments 2–4 brown. Dorsum of thorax yellowish with black markings. Pronotum with median black T-shaped mark at anterior margin and confluent with two lateral black marks which run to propleura. Mesonotum: black mark on anterior margin slender and connected with lateral stripes and median longitudinal stripe; lateral stripes slender, reaching posterior margin of mesonotum; sublateral marks slender anteriorly and broadened posteriorly, confluent with black mark on anterior margin (sublateral marks sometimes variable, indistinct); mesopleura with a longitudinal brown stripe. Metanotum with broad black mark running along anterior and lateral margins, confluent with medial longitudinal mark and metacetabular stripes, bordering yellowish background; metacetabular stripes black, slender and short, about half of metacetabular length; yellow areas on meso- and metacetabula covered with silvery pubescence. Fore femur with apical dark ring and a distinct longitudinal mark on external side usually connected with ring, inner and ventral side chiefly brown; fore tibia and tarsus dark brown. Middle and hind legs: coxae and trochanters chiefly yellowish; middle femur mostly yellow, dorsal and ventral surface each with a longitudinal slender brown mark; hind femur only yellowish proximally; tibiae and tarsi dark brown. Abdomen mostly black dorsally. Venter of body with distinct dark marks: pro-, meso-, and metasternum with broad longitudinal black mark medially; mesosternum with additional broad black or dark brown marks on antero-lateral and postero-lateral areas; abdominal sterna chiefly brown, genital segment usually yellowish. Macropterous morph: Pronotum with dark mark on anterior margin, confluent with the median longitudinal stripe, and connected with dark mark on lateral area between anterior corner and humeri; two brown sublateral marks running toward apex of protonal lobe usually confluent with the median stripe posteriorly; posterior margin between humeri and apex light yellowish. Fore wings chiefly dark brown, posterior part of wings light brown.</p> <p>Apterous male (holotype): Head width 1.32, interocular width 0.67, eye size 0.56. Lengths of antennal segments 1–4: 2.06: 0.90: 0.85: 0.70. Pronotum length 0.55, mesonotum length 1.32. Lengths of leg segments (femur: tibia: tarsus 1: tarsus 2): fore leg: 2.05: 1.80: 0.09: 0.67; middle leg: 5.19: 3.50: 1.90: 0.34; hind leg: 5.00: 2.78: 0.30: 0.38. Fore femur: width 0.32, other characteristics as in Diagnosis above. Abdomen length on ventral view: 1.71, pregenital length 0.68; sternum 7 about as long as sterna 3–6 combined, length 0.28. Genital segments medium size: segment 8 broadened posteriorly, length 0.49, width 0.61; characteristics of pygophore, proctiger, paramere, and endosoma as in Diagnosis above.</p> <p>Apterous female (allotype): Head width 1.33; interocular width 0.59; eye size 0.58. Lengths of antennal segments 1–4: 1.90: 0.81: 0.86: 0.71. Pronotum length 0.45, mesonotum length 1.57. Lengths of leg segments: fore leg: 2.03: 1.75: 0.11: 0.67; middle leg: 5.06: 3.43: 2.00: 0.34; hind leg: 4.90: 2.66: 0.29: 0.40. Fore femur slender, width 0.32. Hind coxae simple, without apical projection, hind trochanter produced posteriorly, forming a small process with some long hairs, length of hind trochanter 0.70. Abdominal venter length 1.32, length of tergum 7: 0.20, length of sternum 7 (caudal view): 0.72. Shape of sternum 7: see Diagnosis above. Connexival margin with scattered long hairs.</p> <p>Macropterous male: Head width 1.35, interocular width 0.63, eye size 0.60. Lengths of antennal segments 1–4: 2.05: 0.92: 0.87: 0.72. Pronotum: apex of pronotal lobe rounded, median length 3.03, humeral width 2.25. Fore wing length 4.9. Lengths of leg segments: fore leg: 2.18: 1.75: 0.11: 0.72; middle leg: 5.19: 3.75: 2.13: 0.38; hind leg: 5.19: 2.97: 0.30: 0.42. Fore femur: width 0.38. Abdomen length on ventral view: 1.95, pregenital length 0.72; sternum 7 about as long as sterna 3–6 combined, length 0.27. Abdominal segment 8: length 0.63, width 0.65. Other characteristics as in apterous males.</p> <p>Macropterous female: Head width 1.35, interocular width 0.63, eye size 0.58. Lengths of antennal segments 1–4: 1.83: 0.83: 0.90: 0.72. Pronotum: apex of pronotal lobe rounded, median length 3.20, humeral width 2.35. Fore wing length 5.25. Lengths of leg segments: fore leg: 2.15: 1.95: 0.11: 0.72; middle leg: 5.38: 3.60: 2.18: 0.37; hind leg: 5.25: 2.78: 0.32: 0.42. Fore femur as slender as in apterous female, width: 0.32. Abdominal venter length 1.08, length of sternum 7: 0.76. Other characteristics as in apterous females.</p> <p>Remarks. See Remarks under Metrocoris monticola, new species.</p> <p>Etymology. This species epithet refers to the extensive black marks on ventral surface of the body, a character state usually present in members of the M. compar species group.</p> <p>Distribution. Vietnam: Lao Cai, Lai Chau, Phu Tho (Fig. 141).</p> <p>Habitats. Metrocoris nigriventris, new species has been collected from montane streams, at elevations ranging from 290 to 1220 m.</p> </div>	http://treatment.plazi.org/id/03E887F5377E3F1FFC2DFCF1919A3101	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	A. D., Tran;Polhemus, D. A.	A. D., Tran, Polhemus, D. A. (2017): The genus Metrocoris Mayr, 1865 (Gerromorpha: Gerridae) in Vietnam, with descriptions of five new species. Raffles Bulletin of Zoology 65: 109-149, DOI: http://doi.org/10.5281/zenodo.4502634
03E887F5377C3F19FC54FA11973E32A1.text	03E887F5377C3F19FC54FA11973E32A1.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Metrocoris monticola A.D. & Polhemus 2017	<div><p>Metrocoris monticola, new species</p> <p>(Figs. 26, 27, 43, 108–116)</p> <p>Material examined. Holotype (apterous male) &amp; allotype (apterous female): VIETNAM, Lao Cai Prov., Sa Pa, Sin Chai, Sin Chai stream, site 1, coll. Tran A.D. et al., 27 October 2013, TAD1363 (ZMHU).</p> <p>Paratypes: VIETNAM: 6 males, 5 females (apt), same locality data as holotype (ZMHU, BPBM, NHMW, ZRC).</p> <p>Diagnosis. Both sexes: body sub-ovate, ventral surface with distinct dark marks; fore femur clearly longer than mesosternum. Male: fore femur moderately slender (ratio length/width: 5.66–6.49), proximal half about as wide as distal half, ventral surface with a distinct notch near the middle, pilosity denser and longer at proximal half (Fig. 108); genitalia of medium size, abdominal segment 8 clearly longer than sternum 7; pygophore simple, on ventral view apex of pygophore broadly rounded, postero-lateral surface with sparse long yellowish hairs; proctiger simple, slightly broadened at basal two-fifths, with long hairs on lateral margins (Fig. 109); paramere not extending beyond genital segment but prominent, curved dorsad at distal half, apex broadened and rounded, curved outwards and posteriorly (Figs. 110–112); endosoma: dorsal sclerite long and recurved proximally, apical accessory sclerite large but weakly sclerotised, lateral sclerite slender and short, thin accessory lateral sclerite present (Figs. 113, 114). Female: fore femur simple and slender (ratio length/width 6.94–7.53); hind trochanter elongated, without long hairs (Fig. 115); abdomen shortened, tip of abdomen not surpassing apex of hind trochanter; sternum 7 large, clearly longer than previous sterna together, constricted laterally, posterior part producing a median lobe with broadly rounded apical margin, directed dorsad, and completely enclosing genitalia on ventral view (Fig. 116).</p> <p>Description. Size: apterous males: length 5.80–6.00 (holotype 5.88), width 2.53–2.75 (holotype 2.66); apterous females, length 5.13–5.44 (allotype 5.13), width 2.75–2.84 (allotype 2.75).</p> <p>Colour (Figs. 26, 27): Apterous morph: Interocular area with dark brown mark medially. Antenna: segment 1 yellowish at proximal part and brown at distal part; segments 2–4 brown or lightly brown. Dorsum of thorax yellowish with black markings. Pronotum with median black T-shaped mark at anterior margin and confluent with two black marks on anterolateral areas, which run to propleura. Mesonotum: black mark on anterior margin connected with lateral stripes and median longitudinal stripe; lateral stripes slender, reaching posterior margin of mesonotum; sublateral marks slender broadened posteriorly, confluent with black mark on anterior margin; mesopleura with a longitudinal brown stripe. Metanotum with broad black mark running along anterior and lateral margins, confluent with medial longitudinal mark and metacetabular black marks, bordering yellowish background; metacetabula with broad black marks usually reaching posterior margin of metacetabula; yellow areas on meso- and metacetabula covered with silvery pubescence. Fore femur with apical dark ring and a distinct longitudinal mark on external side usually connected with ring, inner and ventral surface either dark brown or light brown; fore tibia and tarsus brown or dark brown. Middle and hind legs: coxae and trochanters chiefly yellowish; middle femur mostly yellow, dorsal surface with a longitudinal slender brown mark, ventral surface sometimes with indistinct longitudinal brown mark; hind femur only yellowish proximally; tibiae and tarsi dark brown. Abdomen mostly black dorsally. Venter of body with distinct dark marks: pro-, meso-, and metasternum with broad longitudinal black mark medially; mesosternum with addtional broad black or dark brown marks on antero-lateral and postero-lateral areas; abdominal sterna chiefly brown, terminal segments usually yellowish.</p> <p>Apterous male (holotype): Head width 1.49, interocular width 0.67, eye size 0.64. Lengths of antennal segments 1–4: 2.81: 1.15: 0.95: 0.80. Pronotum length 0.55, mesonotum length 1.55. Lengths of leg segments (femur: tibia: tarsus 1: tarsus 2): fore leg: 2.72: 2.43: 0.14: 0.90; middle leg: 6.90: 4.85: 2.50: 0.41; hind leg: 7.00: 4.15: 0.35: 0.40. Fore femur: width 0.44, other characteristics as in Diagnosis above. Abdomen length on ventral view: 2.00, pregenital length 0.74; sternum 7 about as long as sterna 4–6 combined, length 0.27. Genital segments medium size: segment 8 not distinctly broadened posteriorly, length 0.58, width 0.81; characteristics of pygophore, proctiger, paramere, and endosoma as in Diagnosis above.</p> <p>Apterous female (allotype): Head width 1.42; interocular width 0.64; eye size 0.63. Lengths of antennal segments 1–4: 2.30: 1.05: 0.95: 0.79. Pronotum length 0.49, mesonotum length 1.59. Lengths of leg segments: fore leg: 2.56: 2.28: 0.09: 0.86; middle leg: 6.40: 4.45: 2.45: 0.40; hind leg: 6.40: 3.75: 0.39: 0.44. Fore femur simple and slender, width 0.34. Hind coxae simple, without apical projection, hind coxa and trochanter without long hairs, length of hind trochanter 0.68. Abdominal venter length 1.53, length of tergum 7: 0.09, length of sternum 7 (caudal view): 0.92; shape of sternum 7: see Diagnosis above.</p> <p>Macropterous morph unknown.</p> <p>Remarks. Chen &amp; Nieser (1993) defined the M. compar species group on the basis of the following character states: usually darkened ventral surface of the body; male fore femur slender and simple; male paramere hook-shaped or falciform; male endosoma with a long ventral sclerite; hind coxa and trochanter of female usually modified (e.g., elongated and covered with very long hairs); sternum 7 of female constricted, with a median lobe on posterior margin. Both M. monticola, new species and M. nigriventris, new species clearly belong to the M. compar species group. This new species is similar in many respects to M. nigriventris, new species, but differs from the latter by the combination of the following characteristics: longer fore femur (in M. monticola clearly longer than the mesosternum in both sexes, while in M. nigriventris only subequal to the length of the mesoternum); shape of the fore femur of the male (in M. monticola with the notch in the middle of the ventral surface more distinct); relatively larger genitalia; the shape of the male paramere; the shape of pygophore on ventral view; the pilosity of pygophore (in M. monticola with sparse hairs, in M. nigriventris with longer and denser hairs); slightly longer abdomen in the female (in M. monticola clearly surpassing the apex of hind coxae); and the median lobe of sternum 7 of female (broader in M. monticola).</p> <p>The shape of paramere of M. monticola is relatively similar to that of Metrocoris compar (White, 1883) from India and Myanmar, and M. pardus Zettel, 2011 from Peninsular Malaysia, but other characters show significant differences between the these species: M. monticola and M. pardus are distinctly different in the colour pattern of dorsum; and the female of M. pardus has a distinctly shortened abdomen, with the apex of the abdomen only reaching the base of the hind coxa, while in the female of M. monticola the apex of the abdomen reaches the apex of the hind coxa. Comparing M. monticola and M. compar, the paramere of M. monticola has no long hairs as seen in that of the latter; M. monticola has a longer sternum 7 (about 1.5 times as long as the preceeding abdominal sterna, versus only about 1.1 times in M. compar, see Chen &amp; Nieser, 1993). It is notable that, among taxa in the M. compar species group, M. monticola has probably the simplest hind coxa and trochanter in the female, being elongated but without significant modification and no long hairs.</p> <p>Etymology. The name monticola, treated as a noun in apposition, meaning inhabiting (- cola) mountain area (monti -), is given to this species, as it was found in a montane stream.</p> <p>Distribution. Vietnam: Lao Cai (Fig. 141).</p> <p>Habitats. Metrocoris monticola has been collected from a small montane stream, at elevation ca. 1400 m.</p> </div>	http://treatment.plazi.org/id/03E887F5377C3F19FC54FA11973E32A1	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	A. D., Tran;Polhemus, D. A.	A. D., Tran, Polhemus, D. A. (2017): The genus Metrocoris Mayr, 1865 (Gerromorpha: Gerridae) in Vietnam, with descriptions of five new species. Raffles Bulletin of Zoology 65: 109-149, DOI: http://doi.org/10.5281/zenodo.4502634
03E887F5377A3F1BFC4AF97197B53141.text	03E887F5377A3F1BFC4AF97197B53141.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Metrocoris sapa A.D. & Polhemus 2017	<div><p>Metrocoris sapa, new species</p> <p>(Figs. 28, 29, 117–122)</p> <p>Material examined. Holotype (apterous male) &amp; allotype (apterous female): VIETNAM, Lao Cai Prov., Sa Pa, Hoang Lien N’Park, Nui Xe, upstream of Suoi Vang, coll. Tran A.D., 4 July 2004, TAD0416 (ZMHU).</p> <p>Paratypes: VIETNAM, Lao Cai Prov.: 1 male, 1 female (apt), 1 male, 4 females (mpt), same locality data as holotype (ZRC); 1 male (mpt), Sa Pa, Hoang Lien N’Park, Nui Xe, Suoi Vang, coll. Tran A.D., 4 July 2004, TAD0417 (ZRC).</p> <p>Diagnosis. Both sexes: body sub-ovate, ventral surface light coloured ventral surface, without any dark mark; fore femur clearly longer than mesosternum. Male: fore femur moderately slender (ratio length/width: 6.60), proximal half, broader than distal half, constricted near near the middle, pilosity denser and longer at proximal half (Fig. 117); genitalia small: abdominal segment 8 clearly longer than sternum 7; proctiger simple, elongated and slender; pygophore ovate on ventral view; paramere falciform, simple, curved at middle part, apex rounded and not modified (Fig. 118); endosoma (Figs. 119, 120): dorsal sclerite long and recurved on apical, apical accessory sclerite distinct, ventral sclerite shorter than dorsal sclerite, lateral sclerite straight, rather broad, partially sclerotised. Female: fore femur simple, not modified as in male, and slender (ratio length/width: 7.94); hind coxa and trochanter enlongated, without apical projection, interior side of hind coxa and trochanter with long hairs (Fig. 121); abdominal sternum 7 broader than long, clearly longer than previous sterna together, constricted laterally, posterior part producing a median lobe with nearly straight apical margin, directed dorsad, and completely enclosing genitalia on ventral view (Fig. 122).</p> <p>Description. Size: apterous males: length 4.80–5.60 (holotype 5.60), width 2.48–2.97 (holotype 2.97), macropterous males: length 8.00–8.10, width 2.87; apterous females: length 4.80–5.10 (allotype 5.10), width 2.90–2.94 (allotype 2.94), macropterous females: length 8.00–8.30, width 3.00–3.04.</p> <p>Colour (Figs. 28, 29). Dorsal body mainly pale, light brown markings expanded and yellow markings reduced. Antennae dark brown or black, proximal part of antennal segment 1 yellowish brown. Interocular region of head mainly dark, with yellow mark on posterior margin of head. Pronotum with black anterior margin confluent with a slender median black marking, forming a T-shaped marking; antero-lateral corners with a large light brown marking, leaving the yellow markings slender along the median black marking and on posterior margin. Mesonotum with a slender median black marking, two large light brown markings along each side of median black marking, and a light brown marking on each antero-lateral corner. Metanotum with a slender median black marking, two yellow markings on each side of the median marking running along posterior margin. Abdominal terga 1–7: each tergum dark brown or black on anterior part, and yellow on posterior part. Metacetabula, inner half yellow, outer half brown to dark brown. All coxae and trochanters mainly yellow with small brown markings. Fore femur yellow with 1 brown stripe on outer side and 1 on inner side, confluent with brown apical part. Middle and hind femora mainly yellowish brown. Tibia and tarsus dark brown or black. Venter of body mainly light yellow. In macropterous form, pronotum with median T-shaped black marking on anterior margin, pronotal lobe mainly yellowish brown with lateral margin light yellow from humeri to tip of pronotal lobe, wings mainly brown.</p> <p>Apterous male (holotype): Head width 1.59, interocular width 0.67, eye size 0.75. Lengths of antennal segments 1–4: 2.54: 1.17: 1.03: 0.71, antennal segment 2 with scattered spines. Pronotum length 0.49, mesonotum length 1.58. Lengths of leg segments (femur: tibia: tarsus 1: tarsus 2): fore leg: 2.64: 2.51: 0.08: 0.86; middle leg: 7.30: 5.45: 2.51: 0.35; hind leg: 7.80: 4.61: 0.35: 0.44. Fore femur: width 0.40, other characteristics as in Diagnosis above. Abdomen length on ventral view: 1.71, pregenital length 0.83; sternum 7 slightly longer than sterna 5 and 6 combined, length 0.27. Genital segments small: segment 8 sub-rectangular on dorsal view, length 0.44, width 0.56; characteristics of pygophore, proctiger, paramere, and endosoma as in Diagnosis above.</p> <p>Apterous female (allotype): Head width 1.64, interocular width 0.65, eye size 0.78. Lengths of antennal segments 1–4: 2.23: 1.06: 1.03: 0.71, antennal segment 1 with scattered spines. Pronotum length 0.44, mesonotum length 1.70. Lengths of leg segments: fore leg: 2.54: 2.38: 0.08: 0.83; middle leg: 7.00: 5.10: 2.35: 0.33; hind leg: 7.30: 4.56: 0.32: 0.42. Fore femur: width 0.32, other characteristics as in Diagnosis above. Hind coxae without apical projection, length of hind trochanter 0.76, interior side of hind coxa and trochanter with long hairs (Fig. 121). Abdominal venter length 1.08. Abdominal sternum 7 broader than long, length ca. 0.98 (caudal view), shape of sternum 7: see Diagnosis above.</p> <p>Macropterous male: head width 1.56, interocular width 0.63, eye size 0.70. Lengths of antennal segments: 2.48: 1.17: 0.98: 0.71. Pronotum length 3.30, humeral width 2.48. Fore wing length 6.40. Lengths of leg segments: fore leg: 2.48: 2.44: 0.10: 0.79; middle leg: 7.10: 5.15: 2.33: 0.35; hind leg: 7.30: 4.26: 0.32: 0.40. Margin of connexivum with long hairs. Other characteristics similar to apterous male.</p> <p>Macropterous female: head with 1.52, interocular width 0.63, eye size 0.71. Lengths of antennal segments: 2.08: 0.90: 0.95: 0.68. Pronotum length 3.45, humeral width 2.48. Fore wing length 6.30. Lengths of leg segments: fore leg: 2.48: 2.31: 0.08: 0.76; middle leg: 6.30: 4.70: 2.38: 0.35; hind leg: 6.80: 4.17: 0.35: 0.44. Margin of connexivum with long hairs. Other characteristics similar to apterous female.</p> <p>Remarks. Based on the definition of M. compar species group (sensu Chen &amp; Nieser, 1993, see Remarks under M. monticola, new species), we can assign also M. sapa, new species to the M. compar species group. However, M. sapa does not totally fit the diagnostic characteristics of this group because it has a light coloured ventral surface, without any dark markings.</p> <p>Metrocoris sapa, new species is most similar to M. hirtus Chen &amp; Nieser, 1993 (from Sichuan, China) in having a similar general shape of the male parameres, endosomal structures and female hind coxa. The dorsal colour pattern of M. sapa is similar to that of M. pardus Zettel, 2011 (from Peninsular Malaysia). However, the apex of the paramere in M. sapa is rounded, simple and not modified like those of M. hirtus or M. pardus (see Chen &amp; Nieser, 1993: Fig. 195; Zettel, 2011: Fig. 8). This species can also be distinguished from all other species of the M. compar group by the combination of following characters: apex of paramere rounded and not modified; endosoma with the apical sclerite more developed, lateral sclerite indistinct, ventral sclerite shorter; median lobe of sternum 7 of female with rounded apex; hind coxa of female with less dense pilosity and with the apex not produced.</p> <p>The discoveries of M. nigriventris, M. monticola, and M. sapa have raised the total number of species in the M. compar group to nine, and they are also the first records of this group in Vietnam. Other previously known species have been found in India, Nepal, Myanmar, China, and Peninsular Malaysia (Chen &amp; Nieser, 1993; Chen, 1994; Zettel, 2011).</p> <p>Etymology. This species is named after its type locality, Sa Pa. The word “ sapa ” is used here specifically as a noun in apposition.</p> <p>Distribution. Vietnam: Lao Cai (Fig. 141).</p> <p>Habitats. Metrocoris sapa was collected from a montane stream, at elevations between 1800 and 1900 m. It was found in association with M. quynhi and M. acutus, both of which are much larger species. Due to the small size and pale dorsal colour of living specimens in this new species, it may superficially resemble nymphs of other Metrocoris species.</p> </div>	http://treatment.plazi.org/id/03E887F5377A3F1BFC4AF97197B53141	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	A. D., Tran;Polhemus, D. A.	A. D., Tran, Polhemus, D. A. (2017): The genus Metrocoris Mayr, 1865 (Gerromorpha: Gerridae) in Vietnam, with descriptions of five new species. Raffles Bulletin of Zoology 65: 109-149, DOI: http://doi.org/10.5281/zenodo.4502634
03E887F537783F27FC2BFA1190423361.text	03E887F537783F27FC2BFA1190423361.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Metrocoris tenuicornis Esaki 1926	<div><p>Metrocoris tenuicornis Esaki, 1926</p> <p>(Figs. 30, 31, 123–136)</p> <p>Metrocoris tenuicornis Esaki, 1926: 125, Figs. 3 c–e (type locality: Annam, Vietnam); den Boer, 1965: 28–29, Figs. 36, 48, 63–64 (additional notes); Cheng, 1966: 273–282, Figs. 1–25 (life history); Polhemus, 1990: 18–19, Figs. 14, 34–35, 49 (redescription); Chen &amp; Nieser, 1993: 70–72, Figs. 183–184, 196, 202 (redescription); Zettel &amp; Chen, 1996: 152, 178 (faunistic notes).</p> <p>Material examined. Syntypes: 1 macropterous male, 1 apterous female, “ Annam, Laos ” / “det. T. Esaki ” (MTMB) (hereby, the macropterous male is designated as lectotype and the apterous female is desginated as paralectotype).</p> <p>Others: VIETNAM: Dien Bien Prov.: 1 male (mpt), Na Tau, Nam Rom river, coll. Tran A.D., 25 July 2004, DY0412 (ZRC). Hai Duong Prov.: 3 males, 3 females (apt), Kheao stream, 23 km N. of Chi Linh, 125 m asl, water temp. 17°C, 25 March 2000, CL 4376, coll. J.T. Polhemus &amp; P. Nguyen (USNM). Thanh Hoa Prov.: 1 female (apt), Ben En N’Park, Ngòn stream, near Bang ranger station, coll. Pham T.D., 03 August 2012, BE1205 (ZMHU); 3 females (apt), Ben En N’Park, Nhu Xuan, Khe May stream, coll. Pham T.D., December 2012, BE1206 (ZMHU); 1 female (apt), Ben En N’Park, Nhu Xuan, Tan Binh, Xuan Ly ranger station, Khe Lo 4 stream, coll. Pham T.D., 26 February 2013, BE1301 (ZMHU); 2 males, 1 female (apt), Ben En N’Park, Nhu Xuan, Son Binh, Khe Cay Khe stream, at junction with road, coll. Pham T.D., 01 March 2013, BE1307 (ZMHU); 2 females (apt), Ben En N’Park, Nhu Xuan, Duc Luong, Khe Cau Da stream, coll. Pham T.D., 08 March 2013, BE1309 (ZMHU); 3 males, 13 females (apt), 1 female (mpt), Ben En N’Park, Nhu Xuan, Xuan Quy, Song Chang ranger station, Khe Khoanh 2 stream, coll. Pham T.D., 11 March 2013, BE1310 (ZMHU). Quang Binh Prov.: 4 males, 2 females (apt), Phong Nha, a stream 1 km behind Forest Ranger station 4, coll. Tran A.D., 16 July 2004, DY0409 (ZRC). Kon Tum Prov.: 7 males, 8 females (apt), shallow trib. to stream 2 km inside <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=107.71388&amp;materialsCitation.latitude=14.431945" title="Search Plazi for locations around (long 107.71388/lat 14.431945)">Chu Mom Ray Nature Reserve</a>, 635 m asl, 14°25′55″N, 107°42′50″E, water temp. 21.5°C, 4 March 2001, CL 4278, J.T. Polhemus and P. Nguyen (USNM, BPBM); 1 male, 1 female (apt), stream 63 km NE. of Kontum on Hwy. 24, 1050 m asl, 14°36′14″N, 108°18′22″E, water temp. 20.5°C, 6 March 2001, CL 4281, coll. J.T. Polhemus &amp; P. Nguyen (USNM). Gia Lai Prov.: 1 male (apt), 40 km, NW. An Khe, Buon Luoi, 14°10′N, 108°30′E, 620–750 m asl, 28 March–12 April 1995, coll. Pacholátko &amp; Dembicky (NHMW); 11 males, 18 females (apt), Tral Stream, 60 km N. of An Khe, 700 m asl, 14°20′28″N, 108°34′49″E, water temp. 23.5°C, 22 March 2001, CL 4309, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM). Lam Dong Prov.: 7 males, 8 females (apt), lake at <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.45&amp;materialsCitation.latitude=11.9775" title="Search Plazi for locations around (long 108.45/lat 11.9775)">Valley of Love</a>, 5 km N. of Dalat, 1495 m asl, 11°58′39″N, 108°27′00″E, 11 May 1998, CL 3086, coll. J.T. Polhemus (USNM); 10 males, 6 females (apt), stream in pine forest 13 km N. of <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.38861&amp;materialsCitation.latitude=11.990556" title="Search Plazi for locations around (long 108.38861/lat 11.990556)">Dalat on Suoi Vang</a> road, 1495 m asl, 11°59′26″N, 108°23′19″E, water temp. 21.5°C, 28 March 2001, CL 4317, coll. D.A. Polhemus, J.T. Polhemus &amp; P. Nguyen (USNM, BPBM). Dong Nai Prov.: 1 male, 3 females (apt), Nam Cat Tien, Lan stream B, coll. Tan H.H. et al., 10 May 2001, THH0128 (ZRC); 1 male (apt), Vinh Cuu, Vinh An, Suoi Rang, coll. Tran A.D., 10 May 2003, TAD0315a (ZRC); 1 female (apt), Vinh Cuu, Ma Da, Suoi Sai (Sai stream), up-stream from bridge, coll. Tran A.D., 31 October 2009, TAD0918 (ZMHU); 1 male (mpt), Cat Tien N’Park, feeder stream of Bau Chim (Bird lake), coll. Tran A.D., 7 November 2009, TAD0930 (ZMHU); 7 males, 3 females (apt), Cat Tien N’Park, Cay Si stream, coll. Tran A.D. &amp; Pham T.D., 09 April 2010, PTD1002 (ZMHU). Kien Giang Prov., Phu Quoc island: 5 males, 6 females (mpt), Tranh stream (at lower section), coll. Tran A.D. et al., 30 November 2010, TAD1021 (ZMHU); 4 males (mpt), Tranh stream (middle section &amp; waterfall), coll. Tran A.D., 30 November 2010, TAD1022 (ZMHU).</p> <p>LAOS: Vientiane Prov.: 7 males, 6 females (apt), 1 male (mpt), Ban Van Heue, ~ 20 km E. of Phou Khao Khouay park HQ, 1039 m asl, vic. 18°17′44″N, 102°53′48″E, 31 August 1967, coll. J.L. Gressit et al. (BPBM).</p> <p>CAMBODIA: Koh Kong Prov.: 2 males, 3 females (apt), <a href="http://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.115555&amp;materialsCitation.latitude=11.684167" title="Search Plazi for locations around (long 103.115555/lat 11.684167)">Cardamom Mountains</a>, stream approx. 31 km NE. of Koh Kong on road to Pursat, 310 m asl, 11°41′03″N, 103°06′56″E, water temp. 26°C, 30 August 2015, CL 6021, coll. D.A. Polhemus (BPBM, USNM).</p> <p>THAILAND: Chiang Mai Prov.: 1 male (apt), N. Thailand, 55 km to Chiang Mai, coll. Y.Y. Goh, 13 June 1998, GYY86 (ZRC).</p> <p>MALAYSIA: Perak: 1 male, 1 female (apt), ZRC.6.19655, stream about 195 km to Ipoh (40 km to Gerik) from Baling, coll. H.K. Lua, 20 February 1997, LHK0331 (ZRC); 1 male, 1 female (apt), ZRC.6.19656, Carut Bt. Sebelah, rocky stream, about 2 km before Baling on Gerik, Sg. Pentani Rd, coll. H.K. Lua, 18 February 1997, LHK0327 (ZRC). Sabah: 3 males (apt), Maliau Basin, Sungei Maliau, upstream, coll. K.L. Yeo, 15 May 1996, MB13 (ZRC); 1 male, 3 females (apt), Maliau Basin, Sungei Maliau, upstream, coll. K.L. Yeo, 15 May 1996, MB15 (ZRC); 1 female (apt), Maliau Basin, Heath forest stream, coll. T.B. Lim &amp; K.L. Yeo, 22 May 1996, MB25 (ZRC); 2 males, 1 female (apt), Maliau Basin, Sungei Maliau, upstream, coll. T.B. Lim, 21 May 1996, MB24 (ZRC); 2 females (apt), Maliau Basin, Sungei Maliau, upstream, near Camp 96, coll. T.B. Lim &amp; K.L. Yeo, 14 May 1996, MB4 (ZRC); 1 male, 2 females (apt), Maliau Basin, tributary of Sungei Maliau, upstream, coll. T.B. Lim &amp; K.L. Yeo, 23 May 1996, MB26A (ZRC); 1 male, 3 females (apt), Maliau Basin, Sungei Maliau, near to base camp, coll. G. Gunsalam, 15 May 1996, MB28 (ZRC); 1 male, 2 females (apt), Maliau Basin, Sungei Maliau, upstream, near Camp 96, coll. T.B. Lim &amp; K.L. Yeo, 14 May 1996, MB2 (ZRC); 2 males, 3 females (apt), Maliau Basin, Sungei Maliau, near to base camp (Heliped), coll. G. Gunsalam, 17 May 1996, MB36 (ZRC); 3 males, 3 females (apt), Maliau Basin, coll. G. Gunsalam, 14 May 1996, MB4A (ZRC); 1 female (apt), Maliau Basin, coll. G. Gunsalam, 14 May 1996, MB1A (ZRC); 1 female (apt), Maliau Basin, Sungei Maliau, upstream near Camp 96, coll. T.B. Lim, 13 May 1996, MB1 (ZRC); 1 female (apt), 1 female (mpt), Maliau Basin, near Heliped, coll. G. Gunsalam, 15 May 1996, MB30 (ZRC); 1 female (mpt), Maliau Basin, Sungei Maliau tributary, Camp 88II, coll. K.L. Yeo, 16 May 1996, MB17 (ZRC); 1 female (apt), Maliau Basin, Sungei Maliau, upstream, near Camp 96, coll. T.B. Lim &amp; K.L. Yeo, 14 May 1996, MB2 (ZRC). Sarawak: 1 male, 1 female (apt), Sarawak, Semengoh NSG, 30 km S. Kuching, coll. H. Zettel (2), 17 February 1993 (NHMW).</p> <p>SINGAPORE: 1 female (apt), MacRitchie, Sime Rd, coll. H.K. Lua et al., 2 June 1994, NS148I (ZRC); 9 males, 14 females (apt), MacRitchie, Sime Rd, coll. H.K. Lua et al., 2 June 1994, NS148H (ZRC); 6 males, 17 females (apt), MacRitchie, Sime Rd, coll. H.K. Lua et al., 2 June 1994, NS148E (ZRC); 9 males, 19 females (apt), MacRitchie, Sime Rd, coll. H.K. Lua et al., 2 June 1994, NS148G (ZRC); 2 males, 4 females (apt), 1 male (mpt), ZRC.6.5079–5087, Bukit Timah, coll. C.F. Lim, [date unknown] (ZRC); 1 male (apt), 1 male, 1 female (mpt), Rifle Range Rd, stream, coll. D.H. Murphy, March 1986 (ZRC); 2 males, 12 females (apt), Rifle Range Rd, coll. D.H. Murphy, March 1986 (ZRC); 8 males, 7 females (apt), Nee Soon, swamp forest stream, coll. D.H. Murphy, 3 January 1986 (ZRC); 5 males, 8 females (apt), Rifle Range Rd, secondary stream, coll. Y.H. Lim et al., 3 June 1993, NS109 (ZRC); 13 males, 4 females (apt), stream leading to MacRitchie Reservoir from Thomson ridge, plot 3, coll. Del Sim, 29 April 1993, NS64 (ZRC); 9 males, 26 females (apt), Nee Soon swamp forest, Plot 25, coll. H.K. Lua et al., 21 April 1993, NS51 (ZRC); 8 males, 18 females (apt), SICC, Upper Peirce stream near Plot 8 &amp; 9, coll. C.Y. Chang, 25 May 1993, NS95 (ZRC); 4 females (apt), 1 male (mpt), Rifle Range Rd, coll. H.K. Lua et al., 28 April 1993, NS61 (ZRC); 1 male, 6 females (apt), Chestnut Drive forest swamp, Plot 56-57, coll. H.K. Lua, 22 April 1993, NS55 (ZRC); 1 male, 3 females (apt), Sime Rd, small stream near Plot 6, coll. C.M. Yang et al., 7 April 1993, NS29 (ZRC); 1 male (apt), Upper Peirce Reservoir, Plot No. 31, coll. K.L. Yeo et al., 26 May 1993, NS60 (ZRC); 1 male, 1 female (apt), SICC, Upper Peirce stream, coll. C.Y. Chang, 24 May 1993, NS93 (ZRC); 11 females (apt), Sime Road forest, NW. of SICC Golf Course, Plot 22, coll. K.K.P. Lim et al., 26 April 1993, NS57 (ZRC); 6 males, 15 females (apt), Upper Peirce Reservoir stream, Plot 23, coll. Y.H. Lim et al., 17 May 1993, NS84 (ZRC); 1 male (apt), Nee Soon swamp forest, Central Catchmen survey, coll. K.K.P. Lim et al., 15 April 1993 (ZRC); 6 females (apt), MacRichie Reservoir, near Plot 17, pond, coll. C.M. Yang et al., 13 April 1993, NS34 (ZRC); 1 female (apt), MacRitchie Reservoir, SICC near Plot 4, [collector unknown], 28 May 1993, NS104 (ZRC); 4 males, 14 females (apt), Seletar Reservoir inlet, along Mandai Rd, coll. H.K. Lua et al., 14 April 1993, NS41 (ZRC); 4 males, 4 females (apt), Bukit Timah Nature Reserve, coll. C.M. Yang et al., 1 October 1991, YCM30 (ZRC).</p> <p>INDONESIA: 2 males (apt), Riau, Pulau Bintan, [collector unknown], 20 November 1996 (ZRC); 1 male, 1 female (apt), East Java, 60 km SW. Banyuwangi, Meru Betiri N’Park, W. Sumber Sari, 80 m asl, coll. Schillhammer (12), 4 October 1995 (NHMW).</p> <p>PHILIPPINES: 1 male, 1 female (apt), Palawan, 9 km W. P. Princesa Iwahig, Balsahan river, coll. Zettel (48), 24 March 1994 (NHMW); 2 males, 1 female (apt), Palawan, W. Sabang, 0–30 m, coll. H. Zettel (52e), 29 March 1994 (NHMW); 2 males, 1 female (apt), Mindoro, Mindoro Beach, 10 km W. Puerto Galera, coll. H. Zettel (31a), 23 November 1993 (NHMW).</p> <p>Diagnosis. Basic dorsal pattern as in Figs. 30, 31, the darkness of brown markings variable (from dark brown to yellowish brown). Sexual dimorphism distinct, males are larger and with longer legs than females. Male: fore femur (Fig. 123) slender (ratio of length/width around 8.2) constricted sub-apically, with small, blunt sub-apical elevation on ventral (variable in some populations: indentation not distinct); middle and hind legs usually very long (lengths variable). Male genitalia moderate size; paramere short, distally curved, constricted then widened before apex, tip of paramere pointed, slightly curved outwards (on posterior view, in-situ) (Figs. 124–128, 131–136); endosoma structure as in Fig. 129. Female: sternum 7 large, slightly shorter than all preceding abdominal sterna combined, usually directed dorsad, posterior margin almost straight (Fig. 130).</p> <p>Size: apterous males: length 4.60–6.70, width 2.44–3.30, macropterous males: length 5.70–7.10, width 2.38–3.17; apterous females: length 3.75–5.40, width 2.18–2.90, macropterous females: length 6.80, width 2.81–2.85.</p> <p>Additional description of lectotype. Macropterous male: Size: length 6.40, width 3.20. Head width 1.70, interocular width 0.60, eye size 0.85. Antennae broken. Pronotum/length 3.23, width 2.54. Lengths of leg segments (incomplete, some segments broken off): fore leg: 2.71: 2.64: 0.11: 0.90; middle femur: 10.6; hind leg: 10.5: 6.50: 0.48: 0.27. Fore femur slender, ratio of length/width = 8.2 (width 0.33), ventral surface with a small indentation near apex.</p> <p>Remarks. Esaki (1926) described M. tenuicornis without providing detailed descriptions of the male genitalia (parameres, endosoma). The type locality is “ Annam, Laos ”. The particular location is doubtful, but probably somewhere in the central part of Vietnam (despite the word “ Laos ” in the label, Annam was a popular name referring to the central part of Vietnam in the early 19 th Century, which shared a border with Laos, see Sterling et al., 2006). Den Boer (1965) gave additional notes on the endosomal structure, but he did not describe the parameres of the insect. He also examined the syntypes at the Hungarian Museum, Budapest but did not designate a lectotype. Polhemus (1990) gave a detailed description of this species, based on series of specimens from Peninsular Malaysia, Borneo, Sumatra, the Philippines, Myanmar, India, and Hong Kong, but did not have any material available from Vietnam. Chen &amp; Nieser (1993), when revising the genus Metrocoris, gave some descriptive notes and illustrations of this species. However, the types were not physically examined during either of these two studies. The illustrations of the male paramere in the works of Polhemus (1990: Fig. 34) and of Chen &amp; Nieser (1993: Fig. 196), do not match the paramere of the type specimen. During the course of this study, the syntypes were examined by the first author, and the macropterous male is hereby designated as lectotype to fix the taxonomy of this species (paralectotype: apterous female, in poor condition).</p> <p>Chen &amp; Nieser (1993) placed M. tenuicornis in its own monotypic species group, the M. tenuicornis group, but provided no diagnosis or defining character states for this group (although their comparative notes regarding M. tenuicornis could presumably be taken as the diagnosis for this species group). Recently, Basu et al. (2016) described M. lavitra from West Bengal, India, but indicated that it did not fall into any currently defined species group within the genus. We consider M. lavitra to be a member of the M. tenuicornis group, based on the following characters: (1) fore femur of the male slender, bearing at most a single very small tooth distally near the ventral apex, or unarmed altogether; (2) male paramere crescent-shaped and apically expanded to form an oblique head of variable size (Figs. 131–136); (3) male endosoma with dorsal sclerite long and recurved proximally, ventral sclerite with a tightly coiled extension projecting beyond margin of endsomal capsule (Fig. 129); (4) middle and hind legs of the male usually extremely long, with the length of the middle femur exceeding 10 mm in some specimens, and the length of the hind femur exceeding 8 mm (this character is subject to a degree of intrasexual variability, such that not all individuals exhibit the extreme femoral prolongation, as also noted by Chen &amp; Nieser, 1993).</p> <p>By examining “ Metrocoris tenuicornis ” populations from different areas in Southeast Asia, we observed that there are variations in the structure of the male fore femur (subapical indentation sometimes not distinct) and parameres (the constriction before apex is variable, see Figs. 124, 125, 127, 128, 131–136), but that the male endosomal structures are uniform throughout. Overall, the male paramere shapes in “ Metrocoris tenuicornis ” and M. lavitra seem to form a morphocline (Figs. 131–136), although this progression of shapes does align with any clear east-west geographic trend across Indochina and into India. The male paramere shape in M. lavitra is most similar to that seen in the specimen of M. tenuicornis that we have illustrated from Burma (Fig. 131), and represents a more extremely modified example at one end of this character state series. It is possible that the M. tenuicornis group as we have defined it herein contains a set of cryptic sibling species, but such a conclusion is premature, and would be most effectively investigated using molecular techniques. As such, all Vietnamese populations that currently key to M. tenuicornis are treated as conspecific in the context of the present work, until further evidence can be found to justify taxonomically subdividing this assemblage.</p> <p>Distribution. Vietnam: Dien Bien, Hai Duong, Thanh Hoa, Quang Binh, Kon Tum, Gia Lai, Lam Dong, Dong Nai, Phu Quoc (Fig. 141). Extralimital records: China, Hong Kong, Southeast Asia from mainland, including Cambodia (first record), Laos (confirmed record), to the Malay Archipelago and the Philippines (see Chen &amp; Nieser, 1993).</p> <p>Habitats. Metrocoris tenuicornis is often found skating on moderate or slow flowing forest streams. Except for some populations found in mountane areas of Vietnam at the elevations of 620–760 m, this species is mostly found in lowland areas. This habitat preference may contribute to the wide distribution of M. tenuicornis.</p> </div>	http://treatment.plazi.org/id/03E887F537783F27FC2BFA1190423361	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	A. D., Tran;Polhemus, D. A.	A. D., Tran, Polhemus, D. A. (2017): The genus Metrocoris Mayr, 1865 (Gerromorpha: Gerridae) in Vietnam, with descriptions of five new species. Raffles Bulletin of Zoology 65: 109-149, DOI: http://doi.org/10.5281/zenodo.4502634
