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 1.6 X as long as broad; pedicel with 1 ventral apical seta nearly length of first flagellomere; arista nearly 3.6 X 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 M 1; discal band much light than distal band, along M 1 but posterior to R 4 + 5, basal to middle of penultimate section of M 1. Bm-cu in line with CuA 2, A 1 +CuA 2 3 X as long as CuA 2; distance between apex of R 2 + 3 and R 4 + 5 0.5 X as long as M 1 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.