158,369 research outputs found
Metrocoris vietnamensis Tran & Zettel 2005
No full textMetrocoris vietnamensis Tran & Zettel, 2005 (Figs. 9, 52–55) Metrocoris vietnamensis Tran & Zettel, 2005: 42–45, Figs. 1–9, 24, 26, 27 (type locality: Ba Na - Nui Chua, Da Nang, Vietnam). Material examined. Holotype and paratypes: see Tran & Zettel (2005). Others: VIETNAM: Da Nang Prov.: 1 male, 1 female (apt), Ba Na - Nui Chua, Suoi Nai - Thac Cau Vong, coll. Tran A.D. & 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. & Tan H.H., 01 March 2005, THH05-24 (ZRC). 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 & Zettel, 2005: Figs. 4, 5); proctiger elongate (see Tran & 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 & 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. 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). Remarks. Metrocoris vietnamensis belongs to the Metrocoris bilobatus species group (sensu Chen & Nieser, 1993), and is the second species of this group found in Vietnam, the first being M. bilobatoides (see Chen & Nieser, 1993). A detailed comparison of Metrocoris vietnamensis with its congeners in the M. bilobatus group has already been provided by Tran & 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. Distribution. Vietnam: Da Nang (Fig. 138).Published as part of A. D., Tran & Polhemus, D. A., 2017, The genus Metrocoris Mayr, 1865 (Gerromorpha: Gerridae) in Vietnam, with descriptions of five new species, pp. 109-149 in Raffles Bulletin of Zoology 65 on page 119, DOI: 10.5281/zenodo.450263
Rhyacobates anderseni Tran & Yang 2006
No full textRhyacobates anderseni Tran & Yang, 2006 Rhyacobates anderseni Tran & Yang, 2006: 14 –16, Figs. 7 –16, 27 (type locality: Vu Quang, Ha Tinh Prov., Vietnam). Material examined. For holotype and paratypes, see Tran & Yang (2006). Size. Males, length 6.0– 6.1 (allotype 6.0), width 1.83–1.85 (allotype 1.83) (apterous), length 6.1–6.2, width 1.85–1.88 (macropterous); females, length 6.8 –7.0 (holotype 6.8), width 2.52–2.57 (holotype 2.52) (apterous). Remarks. The followings are diagnostic characteristics of R. anderseni: the mesonotum of the male has a slender yellow stripe on the posterior half; the mesonotum of the female has a broader yellow median marking on the posterior three-fifths; the abdomen of the male is relatively short; in lateral view, abdominal segment 8 of the male has a concave ventral surface; the male proctiger has round angular projections on each side (see Tran & Yang 2006: Fig. 12); the male paramere is falciform, slightly broad, long, and not conspicuously setose (see Tran & Yang 2006: Figs. 13, 14); the metanotum of the female has a pointed median process on the posterior margin (see Tran & Yang 2006: Fig. 7); the abdomen of the female is short (length about 0.2 times body length), sternum 7 is long, almost enclosing the genital segments with its connexival margin raised slightly upwards, with a pair of long posterior projections pointing outwards and downwards (see Tran & Yang 2006: Figs. 8, 9), and its posterior margin is almost straight, bearing two short lateral processes (see Tran & Yang 2006: Fig. 10). For detailed comparisons of Rhyacobates anderseni with its congeners and other ptilomerine genera (Andersenius and Pleciobates), refer to Tran & Yang (2006: 16). Habitats. See Tran & Yang (2006: 16). Distribution. Vietnam: Ha Tinh. China: Yunnan.Published as part of Tran, A. D. & Nguyen, X. Q., 2016, Three new species of the water strider genus Rhyacobates Esaki, 1923 (Hemiptera: Gerridae) from Vietnam, pp. 501-516 in Zootaxa 4121 (5) on pages 512-513, DOI: 10.11646/zootaxa.4121.5.1, http://zenodo.org/record/27168
Ranatra nieseri Tran & Nguyen 2016
No full textRanatra nieseri Tran & Nguyen, 2016 Ranatra nieseri Tran & Nguyen, 2016: 517–519 (type locality: Ninh Binh, Vietnam). Material examined. Same as in Tran & Nguyen (2016). Diagnosis. Body length: males 22.0–2.5, female 24.0; siphon length ca. 0.7–0.8× body length; lorum swollen, slightly lower than clypeus; vertex higher than eye, with low conical tubercle; eye width ca. 0.9–1.1× interocular width; space between middle coxae about 0.6× space between hind coxae; posterior margin of metasternum slightly emarginated; hind femur, when folded back parallel to body nearly reaching apex of abdomen (in both sexes); paramere dorso-ventrally constricted in distal third, apical hook evenly curved, tip of hook truncate, expanded, ventral margin with a broad tooth-like elevation immediately basad of hook. Distribution. Vietnam: Ninh Binh (Tran & Nguyen, 2016).Published as part of Tran, A. D. & Zettel, H., 2021, Taxonomy of the Ranatra biroi group sensu Lansbury, 1972 (Nepomorpha: Nepidae), with descriptions of two new species, pp. 507-521 in Raffles Bulletin of Zoology 69 on page 514, DOI: 10.26107/RBZ-2021-0068, http://zenodo.org/record/717461
Ranatra rafflesi Tran & D. Polhemus 2012
No full textRanatra rafflesi Tran & D. Polhemus, 2012 (Fig. 1C–E) Ranatra rafflesi Tran & D. Polhemus, 2012: 104–106 (type locality: Singapore). Material examined. MALAYSIA – Sarawak: 1 male (ZRC _ ENT00012970), Sarawak, Sg. Stuum Muda, coll. H. H. Tan, 2 September 1996, THH9694; 2 males, 1 female (ZRC _ ENT00012971–73), Sarawak, Batu Kawa–Matang area, coll. H. H. Tan, 13 January 1996, THH9601; 1 male (ZRC _ ENT00012974), Sarawak, Sibu, coll. H. H. Tan & R. Kerle, 3 March 1998, THH9811; 3 males, 1 female (ZRC _ ENT00012975–78), Sarawak, 10 km from Kuching, coll. H. H. Tan, 4 September 1995, THH9556; 1 male, 1 female (ZRC _ ENT00012979–80), Sarawak, Kuching to Matang road, coll. H. H. Tan, 14 January 1996, THH9608; 2 males, 4 females (ZRC _ ENT00012981–83), Sarawak, 8 km towards Gedong, from Serian – Sri Aman road, coll. H. H. Tan, 16 January 1996, THH9613; 2 males, 1 female (ZRC _ ENT00012984–86), Sarawak 92-42; 1 male, 2 females (ZRC _ ENT00012987–88), Sarawak, MK94-55; 1 male, 1 female (ZRC _ ENT00012989–90), Sarawak, blackwater ditch 2 km fr. Kuching, Mantang Batu Kawa Rd from aff. (on way to Kuching) T-junction, coll. K. Lim, 3 July 1992, 92-45. INDONESIA – Bintan: 1 male (ZRC.6.17711), P. Bintan, 47 km to Tg. Pinang, 1°06′38.1″N, 101°29′18.0″E, [coll. unknown], 27 April 1994, HH008; 1 male, 3 females (ZRC.6.17701), P. Bintan, 1°10′26.2″N, 104°27′28.3″E, upstream, [coll. unknown], 27 April 1994, HH003; 3 males, 4 females (ZRC _ ENT00012941–44), Pulau Bintan, coll. Y. Chia, June 1993, TT11; 4 males (ZRC _ ENT00012944–48), Pulau Bintan, coll. Y. Chia, June 1993, TT9; 3 males, 2 females (ZRC _ ENT00012949–52), Pulau Bintan, coll. Y. Chia, June 1993; 1 male (ZRC _ ENT00012953), Pulau Bintan, north, coll. H. H. Tan, 27 June 1995, THH9531. INDONESIA – Sumatra: 1 male (ZRC.6.17685), Sumatra, Jambi, Sg. Alai, [coll. unknown], 21 June 1995, JMB9511; 1 male, 5 females (ZRC _ ENT00012954–55), Sumatra, east Jambi, coll. H. H. Tan, 22 November 1996, THH96153; 2 males, 2 females (ZRC _ ENT00012956–58), Sumatra, east Jambi, coll. H. H. Tan, 22 November 1996, THH96154; 2 males, 1 female (ZRC _ ENT00012959–61), Sumatra, Jambi, Danau, Kamining nr. Kg. Transos, water pH 6.1, coll. M. Kottelat & H. H. Tan, 31 May 1994, MK94-38; 1 male (ZRC _ ENT00012962), Sumatra Selatan, clear water stream through rubber estate, along road to Sungei Merdak, 7 km into Desa Suka Jaya, coll. H. H. Tan, 11 December 2003, THH03-69; – Banka: 1 male (ZRC _ ENT00012963), Sumatra, Banka, between Kg. Kurau and Kg. Balilik, 25 km N. of Koba, coll. M. Kottelat et al., 3 March 1993, BANGKA 93-95. INDONESIA – Nias: 2 males, Southern Nias, surrounding of Telukdalam, coll. M. A. Jäch, 12 February 1990 (NHMW). INDONESIA – West Kalimantan: 4 males, 4 females (ZRC _ ENT00013054–58, 69–71), 2 nymphs, W. Kalimantan, Sg. Sekawi – Danau Sekawi, coll. Y. Y. Goh et al., 14 May 1998, GYY70 [with paramere of slender form]; 1 male (ZRC _ ENT00013059), W. Kalimantan, Danau Pantu, coll. Y. Y. Goh et al., 4 May 1998, GYY51 [with paramere of slender form]; 2 males, 1 female (ZRC _ ENT00013000–02), W. Kalimantan, btw. Sekadau and Sintang, coll. H. K. Lua, H. H. Tan & D. Wowor, 22 April 1998, LHK0371/ THH9842; 7 males, 5 females (ZRC _ ENT00013003–010), 2 nymphs, W. Kalimantan, Sintang, Sekadau–Sintang Rd., coll. H. K. Lua, H. H. Tan & D. Wowor, 22 April 1998, LHK0372/THH9843 [with variations in parameres: specimens ZRC_ENT00013003–04 with paramere of slender form, same as that in GYY70 sample; others intermediate between holotype and the slender form or same as holotype]; 1 male (ZRC _ ENT00013011), Kalimantan, Sanggau, along Sekadau–Sintang road, coll. H. K. Lua, H. H. Tan & D. Wowor, 25 April 1998, LHK0378; 1 male, 3 females (ZRC _ ENT00013012–13), 1 nymph, W. Kalimantan, Pontianak, Sg. Luar nr. Sg. Tayan, coll. H. K. Lua, H. H. Tan & D. Wowor, 26 April 1998, LHK380/THH9854; 9 males, 4 females (ZRC _ ENT00013014–23, 66–68), 2 nymphs, Kalimantan, Pontianak, Lobok Raundal nr. Sg. Tayan, coll. H. K. Lua, H. H. Tan & D. Wowor, 26 April 1998, LHK0381 [parameres: intermediate form between holotype and the slender form as that in GYY70 sample]; 6 males, 6 females (ZRC _ ENT00013024–30), 1 nymph, Kalimantan, Pontianak, Gg. Semahung, nr Pahuman, coll. H. K. Lua, H. H. Tan & D. Wowor, 27 April 1998, LHK0383/ THH9857 [paramere of intermediate form]; 3 males, 1 female (ZRC _ ENT00013031–34), Kalimantan, Pontianak, Sg. Belado, Gg. Kloncet, coll. H. K. Lua, H. H. Tan & D. Wowor, 28 April 1998, LHK0384; 7 males, 7 females (ZRC _ ENT00013035–42), Kalimantan, Pontianak, Anjungan ‘D’, coll. H. K. Lua, H. H. Tan & D. Wowor, 28 April 1998, LHK0385/THH9860 [paramere of intermediate form]; 6 males, 4 females (ZRC _ ENT00013043–49), Pontianak, Sg. Kepayan, Pontianak–Anjungan road, coll. H. K. Lua, H. H. Tan & D. Wowor, 29 April 1998, LHK0386 [some with parameres of intermediate form, others same as holotype]; 1 male (ZRC _ ENT00013050), W. Kalimantan, Pontianak, Anjungan, Sg. Jelimpo, coll. H. H. Tan & Y. Y. Goh, 28 April 1998, THH9859 [paramere of intermediate form]; 1 male (ZRC _ ENT00013051), W. Kalimantan, Desa Tekalong, coll. Y. Y. Goh et al., 8 May 1998, GYY62 [paramere of intermediate form]; – South Kalimantan: 1 male, 1 female (ZRC _ ENT00013052–53), Kalimantan Selatan, Batulicin basin; stream at Simpang Alok, along road from Batulicin to Mantewe, Desa Gunung Raya, coll. H. H. Tan et al., 14 September 2011, THH11-11 [paramere of intermediate form]; – East Kalimantan: 2 males, 3 females (ZRC _ ENT00013072– 76), 1 nymph, Kalimantan Timur, Mahakam basin, Taman Wisata Air Tejun, coll. H. H. Tan & D. Wowor, 11 November 1999, THH9976 [paramere of intermediate form]; 1 male, 1 female (ZRC _ ENT00013077–78), Kalimantan Timur, Mahakam basin, coll. H. H. Tan & D. Wowor, 11 November 1999, THH9977. Diagnosis. Body length: males 21.0–24.0, females 25.0–29.0; siphon length ca. 0.80–0.95× body length; lorum higher than clypeus; vertex higher than eye, with low conical tubercle; eye width ca. 1.0–1.1× interocular width; space between middle coxae about as wide as space between hind coxae; posterior margin of metasternum truncate, only slightly convex; basal part of fore femur about 1.6× as wide as distal part; hind femur, when folded back parallel to body, slightly surpassing apex of abdomen in males, reaching apex of abdomen in females; paramere tapering along distal third, apical hook evenly curved, tip of hook expanded, ventral margin with a broadly triangular tooth immediately basad of hook (Fig. 1C–E). Remarks. This species is closely related to Ranatra natunaensis by having similar paramere structures. Tran & Polhemus (2012) provided comparative notes for these two species. Our examination of numerous further specimens, as listed above, has revealed differences in the paramere structure within samples from the type locality, Singapore, as well as within some samples from other areas. Such variation of the type specimens (from Singapore and from Bintan and Batam of Indonesia) was not reported in the original description by Tran & Polhemus (2012). In the holotype, the width of the apical hook is slightly greater than the width of the middle part (Fig. 1C). In the “slender form” (Fig. 1E), the middle part and/or the distal constriction before the apical hook is sometimes more slender than that of the holotype, thus the width of the apical hook appears greater than the width of the middle part. The most slender form occurs in samples GYY70 and GYY51 from West Kalimantan, Borneo (Fig. 1E). These samples also exhibit some other differences from the type material of R. rafflesi, such as the space between the middle coxae being very narrow, and the ventral teeth on the fore femur being slightly smaller (so that the width of the femur across the larger tooth is slightly smaller than the maximum width of the femur in the basal half). Several other samples from Kalimantan, as noted in the Material examined section, contain both the most slender form of paramere (like those in samples GYY70 and GYY51), the typical form (same as the holotype), and also intermediate forms (Fig. 1D); however, the shape of the apical hook and the triangular sub-apical tooth of the paramere are consistent among these forms. The distance between the middle coxae is also variable, but always narrower than the distance between the hind coxae. Because these differences occur within localities, we treat them as intra-specific and intrapopulation variations. Distribution. Singapore, Borneo (Sarawak), and Indonesia (Bintan, Batam, and Sumatra) (Tran & Polhemus, 2012; Tran & Poggi, 2019). First records from Kalimantan (Borneo) and Nias Island.Published as part of Tran, A. D. & Zettel, H., 2021, Taxonomy of the Ranatra biroi group sensu Lansbury, 1972 (Nepomorpha: Nepidae), with descriptions of two new species, pp. 507-521 in Raffles Bulletin of Zoology 69 on pages 510-511, DOI: 10.26107/RBZ-2021-0068, http://zenodo.org/record/717461
Morphometric Measurements of Field and Laboratory-Reared Spotted-Wing Drosophila (2017-2018)
No full textThe data set contains wing length, wing width, and hind tibia length of laboratory-reared known summer and winter morphs of Drosophila suzukii. Summer morphs were reared on artificial diet at 16:8 (light:dark) and at 25°C. Winter morphs were reared on artificial diet at 12:12 (light:dark) and at 10°C. In addition, we recorded morphometric measurements on field-caught D. suzukii through-out the greater Twin Cities region in Minnesota.Winter and summer morph Drosophila suzukii can be difficult to distinguished based on a color scale. The purpose of this data were to find an alternative, quantitative method for identifying the two morphs using wing and/or hind tibia measurements.Minnesota Invasive Terrestrial Plants and Pests Center (through the the Environment and Natural Resources Trust Fund; mitppc.umn.edu)Tran, Anh K.; Hutchison, W. D.; Asplen, Mark K.. (2019). Morphometric Measurements of Field and Laboratory-Reared Spotted-Wing Drosophila (2017-2018). Retrieved from the University Digital Conservancy, https://doi.org/10.13020/7522-qp82
Rhyacobates gongvo Tran & Yang 2006
No full textRhyacobates gongvo Tran & Yang, 2006 (Figs. 41, 42) Rhyacobates gongvo Tran & Yang, 2006: 16 –19, Figs. 17 –25, 28 (type locality: Sa Pa, Lao Cai Prov., Vietnam). Material examined. For holotype and paratypes, see Tran & Yang (2006). Others: VIETNAM: Lao Cai Prov.: 1 female (apterous), Sa Pa, Nam Sai, Seo Nam Sai stream 1, 22° 15.761 ’N 103 ° 55.909 ’E, 844 m asl., coll. Dinh N.H. et al., 24 October 2012, DNH 12.09 (ZMHU); 1 female (apterous), Sa Pa, Nam Sai, Seo Nam Sai stream 2, 22° 14.67 ’N 103 ° 59.541 ’E, 469 m asl., coll. Dinh N.H. et al., 24 October 2012, DNH 12.10 (ZNHU); 6 males, 5 females (apterous), 2 males (macropterous, de-alated), Sa Pa, Ban Ho, Ban Den, Nam Pu stream (feeder stream of Muong Hoa stream), 22 ° 15.709 ’N 103 ° 58.054 ’E, 416 m asl., coll. Tran A.D. et al., 29 May 2013, TAD 1316 (ZMHU); 1 male, 2 females (apterous), Sa Pa, Thanh Phu, Nam Cang stream, 22 ° 15.401 ’N 103 ° 58.866 ’E, 398 m asl., coll. Tran A.D. et al., 26 October 2013, TAD 1359 (ZMHU); 13 males, 4 females (apterous), Sa Pa, Ban Ho, Nam Pu stream (feeder stream of Muong Hoa stream), site 1, at lower section, 22 ° 15.778 ’N 103 ° 58.270 ’E, 404 m asl., coll. Tran A.D. et al., 26 October 2013, TAD 1361 (ZMHU); 1 female (apterous), Sa Pa, Cat Cat, Ho stream (feeder stream of Muong Hoa stream), 22 ° 19.546 ’N 103 ° 49.880 ’E, 1233 m asl., coll. Tran A.D. et al., 27 October 2013, TAD 1366 (ZMHU). Size. Males, length 6.2–6.5 (allotype 6.5), width 1.88–2.20 (apterous), length 6.4, width 1.97 (macropterous, de-alated); females, length 7.8–8.3 (holotype 8.3), width 2.52–2.67 (holotype 2.52) (apterous), length 7.5, width 2.44 (macropterous, de-alated). Remarks. Rhyacobates gongvo differs from other species of Rhyacobates by the following diagnostic characteristics: in the apterous morph, the mesonotum has a median yellow stripe on the posterior three quarters; the male proctiger has small angular projections on each side (see Tran & Yang 2006: Fig. 22); the male paramere is relatively long and slender, not setose (see Tran & Yang 2006: Figs. 24, 25); the abdomen of the female is elongate and straight (length about 0.4 times body length), the posterior part of sternum 7 is slightly depressed dorsoventrally (see Tran & Yang 2006: Fig. 17); sternum 7 of the female does not totally enclose the genital segments, the posterior margin is straight and without a process, and the connexival projections are long, straight, and flat (see Tran & Yang 2006: Figs. 18–20). Rhyacobates gongvo is relatively similar to R. malaisei Andersen & Chen, 1995, but can be separated from the latter by the diagnosis above (for a comparison between these two species, see Tran & Yang 2006: 18–19). Habitats. See Fig. 40; also see Tran & Yang (2006: 18). Distribution. Vietnam: Lao Cai.Published as part of Tran, A. D. & Nguyen, X. Q., 2016, Three new species of the water strider genus Rhyacobates Esaki, 1923 (Hemiptera: Gerridae) from Vietnam, pp. 501-516 in Zootaxa 4121 (5) on page 513, DOI: 10.11646/zootaxa.4121.5.1, http://zenodo.org/record/27168
Metrocoris quynhi Tran & Zettel 2005
No full text<i>Metrocoris quynhi</i> Tran & Zettel, 2005 <p>(Figs. 10, 11, 35, 66–70)</p> <p> <i>Metrocoris quynhi</i> Tran & Zettel, 2005: 45–48, Figs. 10–17, 25, 28, 29 (type locality: Sa Pa, Lao Cai, Vietnam).</p> <p> <b>Material examined. Holotype</b> and <b>paratypes</b>: see Tran & Zettel (2005).</p> <p> Others – VIETNAM: <b>Lao Cai Prov.:</b> 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 Sa Pa 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 & 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). <b>Lai Chau Prov.:</b> 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> <b>Diagnosis.</b> 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 & 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 & 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> <b>Remarks.</b> <i>Metrocoris quynhi</i> belongs to the <i>M. anderseni</i> species group (sensu Chen & Nieser, 1993) and is the first species of this group found in Vietnam. The morphological characteristics of the <i>M. anderseni</i> group and a detailed comparison of <i>Metrocoris quynhi</i> to other members of this group has already been provided by Tran & Zettel (2005: 44–45).</p> <p> <b>Distribution.</b> Vietnam: Lao Cai, Lai Chau (first record) (Fig. 139).</p>Published as part of <i>A. D., Tran & Polhemus, D. A., 2017, The genus Metrocoris Mayr, 1865 (Gerromorpha: Gerridae) in Vietnam, with descriptions of five new species, pp. 109-149 in Raffles Bulletin of Zoology 65</i> on pages 122-123, DOI: <a href="http://zenodo.org/record/4502634">10.5281/zenodo.4502634</a>
Ranatra bilobata Tran & Nguyen 2016
No full textRanatra bilobata group Diagnosis. Body length: males 34–38, females 32–40; siphon long, ratio of siphon length: body length ca. 0.9–1.1; vertex in lateral view slightly higher than eye, evenly round, tubercle small or absent; process of second antennal segment very long, about equal to third segment; flexor side of fore femur with only one tooth at midlength, without carina, pre-apical teeth absent or only with tooth-like elevation (R. bilobata); metasternum with posterior margin deeply emarginated, usually with a pair of sublateral tumescences (except R. sulawesii); operculum of female not reaching apex of connexivum; male paramere with finger-like pre-apical process before hook, apical hook with pointed tip. Species included. Ranatra sulawesii Nieser & Chen, 1991, R. sterea Chen, Nieser & Ho, 2004, and R. bilobata Tran & Nguyen, 2016. Note. For comparison between these three species, see Tran & Nguyen (2016).Published as part of Tran, A. D. & Zettel, H., 2021, Taxonomic review of the Ranatra gracilis group sensu Lansbury, 1972 (Nepomorpha: Nepidae), with descriptions of four new species, pp. 45-70 in Raffles Bulletin of Zoology 69 on page 47, DOI: 10.26107/RBZ-2021-0005, http://zenodo.org/record/535167
Ranatra rafflesi Tran & Polhemus 2012
No full text<i>Ranatra rafflesi</i> Tran & Polhemus, 2012 <p> <i>Ranatra rafflesi</i> Tran & Polhemus, 2012: 104 –106, Figs. 7, 8, 10, 12–15.</p> <p> <b>Material examined.</b> MALAYSIA: 2 males, 3 females, Sarawak, Sg. Stunggang before Bg. Kayan, coll. HH Tan, 2 Sep.1996, THH9693 (ZRC); 2 males, 1 female, Sarawak, Sg Mautala, coll. M. Kottelat <i>et al.</i>, May 1994, MK94-20 (ZRC.6.17663); 1 male, 3 females, Sarawak, Sibu, coll. M. Kottelat <i>et al.</i>, 15 May 1994, MK94-24 (ZRC); 1 male, Sarawak, Serian, Sg. Kubas, coll. HH Tan, 10 Jun. 1999, THH9938 (ZRC); 1 male, Sarawak, 38km towards Simunjan fr. Kuching – Sri Anam Rd, coll. HH Tan, 4 Sep. 1996, THH96100 (ZRC); 1 male, 1 female, Sarawak, 43km to Sri Aman, nr. Batang Ai turnoff, coll. HH Tan, 3 Sep. 1996, THH9698 (ZRC); 1 male, 1 female, Sarawak, Sibu, Sg. Teku, coll. HH Tan & R Kerte, 3 Mar. 1998, THH9810 (ZRC). INDONESIA: 5 males, 3 females, Sumatra, Jambi, Danau Rasau, coll. M Kottelat & HH Tan, 1–2 Jun. 1994, MK94-39 (ZRC).</p> <p> <b>Remarks.</b> First record for Borneo (Sarawak) and Sumatra.</p>Published as part of <i>Tran, A. D. & Poggi, R., 2019, The genus Ranatra Fabricius (Heteroptera: Nepidae) in Borneo, with a redescription of Ranatra spinifrons Montandon and the description of a new species, pp. 236-246 in Zootaxa 4555 (2)</i> on page 244, DOI: 10.11646/zootaxa.4555.2.4, <a href="http://zenodo.org/record/2624329">http://zenodo.org/record/2624329</a>
Ranatra heoki Tran & Poggi 2019
No full textRanatra heoki Tran & Poggi, 2019 Ranatra heoki Tran & Poggi, 2019: 241–244 (type locality: Sarawak, Borneo). Additional material examined. BRUNEI: 4 males, 1 female (ZRC.6.18837, NHMW), Tutong District, Logon Uluh Boyoh (pool) and Bawang Ulop (stream), coll. Tan H.H., 17 May 1996, THH9633. INDONESIA: Bintan: 1 male (ZRC), Pulau Bintan North, swamp forest at Tanjung Bintan end, east of Pasir Panjang beach, ca. 100–200 m from sea, coll. H.H. Tan, 27 June 1995, THH9529. Diagnosis. Body length: males 25–26, female 29; ratio of siphon length: body length ca. 0.55; siphon index ca. 1.55×; lorum lower clypeus and without nodule dorsally; clypeus with a small conical tubercle anteriorly; ratio of eye width: interocular width ca. 1.0; posterior width of pronotum ca. 1.15× anterior width; pronotal length ca. 1.55× fore coxa length; hemelytra reaching mid-length of abdominal tergum VI; posterior margin of metasternum angularly emarginated, with sublateral grooves; fore femur on flexor side with a median tooth and a median carina, and with one small preapical tooth; hind femur of male, when folded back parallel to body just surpassing mid-length of abdominal sternum VI; in female slightly shorter; paramere: ventral side before apical hook with a small sub-triangular process, apical hook relatively short, tip of hook pointed. Description of female. Colouration similar to males. Body length 29; length of siphon 14.2; width of head 2.47; interocular width 0.76; width of eye 0.83; pronotal length 7.36, anterior pronotal length 5.80; posterior pronotal length 2.85; anterior width of pronotum 2.05; posterior width of pronotum 2.63; lengths of leg segments: fore leg: coxa 4.55, femur 7.82, tibia 3.17, tarsi 0.68; middle leg: femur 10.90, tibia 9.75, tarsi 1.80; hind leg: femur 11.75, tibia 13.65, tarsi 1.96. Hind femur, when folded back parallel to body, just not reaching middle of abdominal sternum VI. Operculum slightly longer than connexivum, surpassing the apex of connexivum by about one-tenth the length of operculum. Respiratory siphon about 1.4× the length of sterna III–V combined. Other characteristics similar to males. Distribution. Borneo: Malaysia: Sarawak (Tran & Poggi, 2019), Brunei (first record). Indonesia: Pulau Bintan (first record).Published as part of Tran, A. D. & Zettel, H., 2021, Taxonomic review of the Ranatra gracilis group sensu Lansbury, 1972 (Nepomorpha: Nepidae), with descriptions of four new species, pp. 45-70 in Raffles Bulletin of Zoology 69 on pages 66-67, DOI: 10.26107/RBZ-2021-0005, http://zenodo.org/record/535167
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