Cothornobata curva, Li, Xuankun, Marshall, Stephen A. & Yang, Ding, 2015

Li, Xuankun, Marshall, Stephen A. & Yang, Ding, 2015, A review of the Oriental species of Cothornobata Czerny (Diptera, Micropezidae, Eurybatinae), Zootaxa 4006 (2), pp. 201-246 : 227-229

11. Cothornobata curva sp. nov.

( Fig. 14 )

Diagnosis. Arms of genital fork convergent on distal 1/3, width at widest point almost twice as wide as base at midpoint; basal tubercle broad and shallow, medial tubercle low. Distiphallus curved and inflated apically. Pregonite crescent-like, apex horn-like.

Description. Male. Body length 7.0–11.0 mm, wing length 5.0– 7.5 mm.

Head mostly subshiny blackish-brown with very thin gray pollinosity. Frontal vitta brown but yellow at apex, densely microsetulose, about 1/3 width of frons; lower orbital plate dull pollinose; ocellar triangle black; lunule orange; face pale yellow, densely microsetulose; gena yellow, lightly pollinose; clypeus uniformly brownish, shiny. Setae and setulae on head black; postgena with 1 strong seta at lower margin. Antenna brownish-yellow; first flagellomere 1.6X as long as broad; pedicel with 1 ventral apical seta nearly length of first flagellomere; arista nearly 3.6X length of first flagellomere, brown except base yellow, long pubescent with distal half bare. Proboscis dark yellow with brown apex, setulae brown. Palpus yellow, setulae black.

Thorax mostly blackish-brown, with notum darker and proepisternum black posteroventrally; lightly pollinose. Scutellum slightly convex, angled dorsally. Setae on thorax black, setulae blackish; katepisternum with 3 strong setae.

Legs mostly yellow, except hind coxa brown, and apical 2/5 of fore femur, apical 1/4 of mid femur and apical 1/5 of hind femur black; tibiae yellow to brown with base and apex darker; tarsi blackish-brown, except mid basitarsus dark yellow with brown tip.

Wing brown; distal band dark brown, reached to middle of distal section of M1; discal band much light than distal band, along M1 but posterior to R4+5, basal to middle of penultimate section of M1. Bm-cu in line with CuA2, A1+CuA2 3X as long as CuA2; distance between apex of R2+3 and R4+5 0.5X as long as M1 beyond dm-cu ( Fig. 14 C). Halter pale yellow with brown base.

Abdomen mostly blackish-brown, lightly pollinose, tergites 2–4 pale yellow with pale gray pollinosity apically. Pleuron dark gray. Epandrium brownish-yellow. Genital fork blackish, with blackish-brown to black setulae; arms strongly divergent basally and convergent on distal 1/3, width at widest point almost twice as wide as base at midpoint; basal tubercle broad and shallow, medial tubercle low and indistinctly convex ( Fig. 14 D). Distiphallus curved ventrally and inflated apically, glans present. Pregonite crescent-like, apex horn-like. Postgonite narrow and directed posteriorly ( Fig. 14 GH).

Female. Unknown.

Type material. HOLOTYPE: CHINA, Yunnan Province: Xishuangbanna, Mengla, Menglun, 800 m, 11.iv.1981, Qikun Yang (♂, CAU). PARATYPE: CHINA, Yunnan Province: same data as holotype (7 ♂, CAU); Dehong, Ruili, Mengxiu, 4.v.1981, Qikun Yang (1 ♂, CAU); Xishuangbanna, Menlun, No. 55, 24.iv.2007, Hui Dong (4 ♂, CAU); Xishuangbanna, Menlun, No. 55, 6.v. 2009, 630 m, Guoquan Wang (2 ♂, CAU); Xishuangbanna, Menlun, No. 55, 7.v.2009, Tingting Zhang (1 ♂, CAU); Xishuangbanna, Mengla, Bubeng Village, 9.v.2009, Guoquan Wang (4 ♂, CAU); Xishuangbanna, Mengla, Bubeng Village, 10.v.2009, Guoquan Wang (1 ♂, CAU); Xishuangbanna, Mengla, Bubeng Village, 11.v.2009, Tingting Zhang (1 ♂, CAU); Xishuangbanna, Mengla, Bubeng Village, 11.v.2009, Xiushuai Yang (4 ♂, CAU); Xishuangbanna, Mengla, Yaoqu, 782 m, 13.v.2009, Tingting Zhang (1 ♂, CAU).

Distribution. Oriental: China (Yunnan).

Remarks. Cothornobata curva is similar to C. mentogensis sp. nov., but differs as follows: scutellum slightly convex, angled dorsally; genital fork with basal tubercle broadly convex, medial tubercle indistinctly convex; distiphallus curved ventrally and inflated apically; pregonite crescent-like, apex horn-like.

Etymology. The specific name refers to the curved distiphallus.

Figures

FIGURE 14. Cothornobata curva sp. nov., male. A, left lateral; B, head; C, wing; D, genital fork; E, genitalia, left lateral; F, genitalia, posterior; G, aedeagus and associated structures, left lateral; H, aedeagus and associated structures, ventral. Scale bars = 1 mm. Abbreviations: frorb s, fronto-orbital setae; i vt s, inner vertical seta; o vt s, outer vertical seta; poc s, postocellar seta.