Cothornobata bubengensis, 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 : 240

17. Cothornobata bubengensis sp. nov.

( Fig. 22 )

Diagnosis. Fore tibia black, tarsi blackish-brown, except mid basitarsus dark yellow with blackish-brown apex. Wing discal band darker than distal band. Arm of genital fork subparallel basally and incurved apically at right angle; medial tubercle indistinctly convex.

Description. Male. Body length 7.5–9.0 mm, wing length 5.5–6.5 mm.

Head mostly shiny blackish-brown with very thin gray pollinosity. Frontal vitta orange with yellow apex, densely microsetulose, about 3/5 width of frons; lower orbital plate dull pollinose; ocellar triangle black; lunule reddish orange; face pale yellow, densely microsetulose; gena yellow, lightly pollinose; clypeus uniformly blackish. Setae and setulae on head black; postgena with 1 strong seta at lower margin. Antenna brownish-yellow; first flagellomere 1.8X as long as broad; pedicel with 1 ventral apical seta more than half length of first flagellomere; arista nearly 3.6X length of first flagellomere, brown except base yellow, bare. Proboscis brown with brown apex, setulae brown to black. Palpus dark yellow, setulae black.

Thorax mostly blackish-brown with pale gray pollinosity; notum darker and proepisternum black posteroventrally. Scutellum slightly convex, angled dorsally. Setae on thorax black, setulae blackish; katepisternum with 3 to 4 strong setae.

Legs mostly yellow, except hind coxa brown; apical 1/3 of fore femur, apical 1/5 of mid femur and apical 3/20 of hind femur black; fore tibia black, mid and hind tibiae yellow to brown with darker base and apex; tarsi blackish-brown, except mid basitarsus dark yellow with blackish-brown apex.

Wing brown; distal band reached to middle of distal section of M1; discal band much darker than distal band, along M1 and anterior to R4+5, basal to middle of penultimate section of M1. Bm-cu distal to CuA2, A1+CuA2 3X as long as CuA2; distance between apex of R2+3 and R4+5 0.6X as long as M1 beyond dm-cu ( Fig. 22 C). Halter pale yellow with brown base.

Abdomen mostly blackish-brown, lightly pollinose; tergites 2–4 pale pale yellow with pale gray pollinosity apically. Pleuron dark gray. Epandrium brownish-yellow. Genital fork brown, with blackish-brown to black setulae; arm subparallel basally and incurved apically at right angle; basal tubercle subquadrate, medial tubercle indistinctly convex, apex slightly inflated ( Fig. 22 D). Distiphallus ending in curved filaments, not inflated apically. Pregonite expanded. Postgonite narrow and apically out-turned, without an acute bend ( Fig. 22 GH).

Female. Unknown.

Type material. HOLOTYPE: CHINA, Yunnan Province: Xishuangbanna, Mengla, Bubeng Village, 11.v.2009, Xiushuai Yang (♂, CAU). PARATYPE: CHINA, Yunnan Province: Dehong, Ruili, Moli, scenic zone of tropical rain forest; 29.iv.2012, Wenliang Li (2 ♂, CAU); Xishuangbanna, Mengla, Yaoqu, 782 m, 13.v.2009, Tingting Zhang (1 ♂, CAU); Xishuangbanna, Menlun, No. 55, 24.iv.2007, Hui Dong (3 ♂, CAU).

Distribution. Oriental: China (Yunnan).

Remarks. Cothornobata bubengensis is similar to C. vietnamensis sp. nov., but differs as follows: fore tibia black; tarsi mostly blackish-brown, but mid basitarsus dark yellow with blackish-brown apex; wing discal band darker than distal band; arm of genital fork subparallel basally and incurved apically at right angle, medial tubercle indistinctly convex.

Etymology. The specific name refers to the type locality, Bubeng Village.

Figures

FIGURE 22. Cothornobata bubengensis 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.