Amemboides fasciculatus, Ye, Zhen, Polhemus, Dan A. & Bu, Wenjun, 2017

Ye, Zhen, Polhemus, Dan A. & Bu, Wenjun, 2017, Review of the genus Amemboides Polhemus & Andersen, 1984 (Hemiptera: Heteroptera: Gerridae) from China, with description of a new species, Zootaxa 4286 (3), pp. 401-410 : 407-409

Amemboides fasciculatus sp. nov.

( FigS. 5 , 10 , 15 , 20, 25 , 30, 35 , 44, 45, 52, 53, 54, 55)

Type material. Holotype: apterouS male, CHINA, Yunnan Prov., Menglian County, Mengma town, Mengma Waterfall (22°13'N, 99°22'E), 1000 m, 19 VII 2016, coll. Zhen Ye ( NKUM) . ParatypeS: 3 apterouS maleS, 2 apterouS female, Same data aS holotype ( NKUM) ; 1 apterouS male, Ruili city, Moli rainforeSt (24°06'N, 97°59'E), 832 m, 15 VII 2016, coll. Zhen Ye ( NKUM) ; 3 apterouS maleS, 4 apterouS female, Tengchong County, GaoShan temple (25°01'N, 98°26'E), 11 V 2011, coll. Zhen Ye ( NKUM) .

Diagnosis. A. fasciculatus sp. nov. Superficially reSembleS A. pilifer , with both SpecieS having Similar body lengthS, the hind margin of abdominal Sternum VII in femaleS viSible in dorSal view, and a long genital Segment in maleS. However, maleS of thiS SpecieS can be eaSily Separated by the Shape of paramereS: in A. fasciculatus sp.

nov., the paramereS are Slightly curved along the diStal 1/5, with a rounded apex (Fig. 45), whereaS in A. pilifer , the paramereS are Simple, Straight, and bar-Shaped (Fig. 39). In addition, in A. fasciculatus sp. nov., the poSterior margin of abdominal Segment VIII iS much wider laterally ( Fig. 25 compared with Fig. 22 of A. pilifer ) and the cluSter of hairS on the poSterolateral margin of the pygophore iS Shorter and SparSer ( FigS. 30, 35 ). In femaleS of A. fasciculatus sp. nov., the hind margin of abdominal Sternum VII haS a much deeper and more evenly rounded notch medially ( Fig. 10 compared with Fig. 7 of A. pilifer ).

Description. Apterous male ( FigS. 5, 1 5 ). Colour: ground colour yellowiSh brown, with moderately contraSting browniSh markingS on dorSum; head vertex with wedge-Shaped browniSh markingS medially, ventrally yellowiSh, clypeuS and labrum browniSh, roStrum yellowiSh brown with black apex. Pro- and meSonota with diStinct pale median Stripe, marginS with light yellow oval-Shaped markingS; lateral marginS and Submedial area with expanded faint browniSh or infuScated markingS. Metanotum dark brown, covered with golden pubeScence. LegS yellowiSh with apiceS of femora, tibiae and tarSi weakly infuScated, Silvery SpotS on meSo- and metaacetabula. Abdomen dorSally yellowiSh brown with Scattered golden pubeScence, ventrally yellowiSh, abdominal terga I and II darkeSt; Segment VIII and pygophore yellowiSh, each weakly infuScated apically. Structural characteriSticS: body length 4.58–4.65 (holotype: 4.61), body width acroSS meSoacetabula 1.55–1.60 (holotype: 1.58), body elongate, bearing Short, golden or Silver, appreSSed pubeScence; head directed forward, head length: 0.70–0.73, head width: 0.96–1.00, head width about 1.37 timeS length; eyeS large and globoSe; antenna Slightly longer than entire body length, antennal SegmentS III and IV Subequal in length, antenna about 1.06 timeS aS long aS body, lengthS of antennal SegmentS I–IV: 1.15, 1.04, 1.35, 1.36; pronotum width: 1.16–1.21, length: 0.76–0.80, about 1.51 timeS aS wide aS long; meSonotum about 2.8 timeS aS long aS metanotum; fore femur moderately incraSSate; middle tarSuS about 0.34 timeS tibial length; hind femur Shorter than middle femur; hind tibia Shorter than hind femur; pretarSuS inSerted Slightly before apex of laSt tarSal Segment; lengthS of leg SegmentS (femur, tibia, tarSuS): fore leg: 1.61, 1.65, 0.34 (0.14+0.20), middle leg: 4.00, 2.68, 0.99 (0.71+0.28), hind leg: 3.36, 1.71, 0.59 (0.35+0.24); abdominal Sternum VII with relatively roundiSh emargination at hind margin. Male genitalia: genital SegmentS larger and longer relative to A. perlatus ( Fig. 15 ); abdominal Segment VIII Shorter ventrally than dorSally, length: 1.02, width: 0.43, about 2.37 timeS aS long aS wide, poSterior margin with Short, erect, browniSh hairS ( FigS. 20, 25 ); pygophore Sub-ovate, poSterior margin evenly convex, lacking proceSS next to baSe of paramere, poSterolateral margin with diStinct cluSter of hairS on each Side ( FigS. 30, 35 ); proctiger elongate, Slightly expanded medially (Fig. 44); paramere Slightly curved in diStal 1/5, apex rounded (Fig. 45).

Apterous female ( Fig. 10 ). Similar to male in general Structure and coloration with following exceptionS: body Slightly longer and wider than male; body length 5.06–5.12, body width acroSS meSoacetabula 2.06–2.11; head length: 0.80–0.82; head width: 1.00–1.05; about 1.25 timeS aS wide aS long; antenna about 1.02 timeS aS long aS body; lengthS of antennal SegmentS I–IV: 1.18, 1.20, 1.41, 1.43; pronotum width: 1.20–1.24, length: 0.68–0.72, about 1.71 timeS aS wide aS long; meSonotum about 3.3 timeS aS long aS metanotum; fore femur relatively Slender; lengthS of leg SegmentS (femur, tibia, tarSuS): fore leg: 2.02, 1.73, 0.35 (0.11+0.24), middle leg: 4.00, 2.96, 1.10 (0.38+0.72), hind leg: 3.60, 2.00, 0.88 (0.48+0.40); connexival corner of abdominal Segment VII obtuSe and rounded, hind margin of abdominal Sternum VII viSible in dorSal view ( Fig. 10 ).

Macropterous male and female: unknown.

Etymology. The Specific epithet “ faSciculatuS ” (from Latin, meaning “cluSter”) referS to the poSterolateral margin of the pygophore with itS diStinct cluSterS of hairS on each Side.

Distribution. China (Yunnan) ( Fig. 55 ).

Habitats. SpecimenS of A. fasciculatus sp. nov. have been obServed and collected near Shaded rockS in clear, faSt-flowing StreamS ( FigS. 52, 53, 54 ).

Figures

FIGURE 55. Distribution records of species of Amemboides in China.

FIGURES 1 – 5. Habitus of Amemboides spp. (males). 1. A. perlatus (Polhemus & Andersen); 2. A. pilifer (Zettel, Yang & Tran); 3. A. vasarhelyii (Zettel); 4. A. yunnanus (Zettel, Yang & Tran); 5. A. fasciculatus sp. nov. (holotype). Scale = 1.0 mm.

FIGURES 6 – 10. Habitus of Amemboides spp. (females). 6. A. perlatus (Polhemus & Andersen); 7. A. pilifer (Zettel, Yang & Tran); 8. A. vasarhelyii (Zettel); 9. A. yunnanus (Zettel, Yang & Tran); 10. A. fasciculatus sp. nov. (paratype). Scale = 1.0 mm.

FIGURES 11 – 15. Bodies of apterous morph of Amemboides spp. in dorsal view (males). 11. A. perlatus (Polhemus & Andersen); 12. A. pilifer (Zettel, Yang & Tran); 13. A. vasarhelyii (Zettel); 14. A. yunnanus (Zettel, Yang & Tran); 15. A. fasciculatus sp. nov. (holotype). Scale = 1.0 mm.

FIGURES 16 – 25. Abdominal segment VIII in ventral and lateral views of Amemboides spp .. 16, 21. A. perlatus (Polhemus & Andersen); 17, 22. A. pilifer (Zettel, Yang & Tran); 18, 23. A. vasarhelyii (Zettel); 19, 24. A. yunnanus (Zettel, Yang & Tran); 20, 25. A. fasciculatus sp. nov. Scale = 0.2 mm.

FIGURES 26 – 35. Pygophore in dorsal and ventral views of Amemboides spp .. 26, 31. A. perlatus (Polhemus & Andersen); 27, 32. A. pilifer (Zettel, Yang & Tran); 28, 33. A. vasarhelyii (Zettel); 29, 34. A. yunnanus (Zettel, Yang & Tran); 30, 35. A. fasciculatus sp. nov. Scale = 0.2 mm.

FIGURES 46 – 54. Habitats and live Amemboides spp. 46. A. perlatus (Polhemus & Andersen); 47. A. pilifer (Zettel, Yang & Tran); 48. A. vasarhelyii (Zettel); 49 – 51. A. yunnanus (Zettel, Yang & Tran); 52 – 54. A. fasciculatus sp. nov.