Cothornobata longigonitea, 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 : 229-233

13. Cothornobata longigonitea sp. nov.

( Figs. 16 , 17 )

Diagnosis. Wing discal band anterior to R4+5. Arms of genital fork convergent on distal 1/3, widest point across arms almost twice as wide as base at midpoint; basal tubercle absent. Pregonite long and slender, needle-like. Postgonite narrow and directed posteriorly, apex cuspate.

Description. Male. Body length 8.5–11.0 mm, wing length 6.5–8.0 mm.

Head mostly subshiny blackish-brown with very thin gray pollinosity. Frontal vitta brown but dark yellow at apex, densely microsetulose, about 2/3 width of frons; lower orbital plate dull pollinose; ocellar triangle black; median occipital sclerite with a small dark yellow spot at middle; lunule yellow; face pale yellow, densely microsetulose; gena yellow, lightly pollinose; clypeus uniformly dark brown, 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 with yellow base, and long pubescent with distal half bare. Proboscis dark yellow with brownish-yellow apex, setulae brown. Palpus dark yellow, setulae black.

Thorax black, lightly pollinose. Scutellum slightly convex, angled dorsally. Setae on thorax black, setulae blackish; katepisternum with 3 strong setae.

Legs mostly dark yellow, except mid and hind coxae brown, apical 1/2 of fore femur black, mid and hind femora with blackish-brown apex; fore tibia black, mid and hind tibiae with brownish-yellow to brown, darker at base and apex; tarsi blackish-brown, except mid basitarsus pale yellow with blackish-brown tip.

Wing light brown with distal and discal bands brown; distal band basal to middle of distal section of M1; discal band along M1 and anterior to R4+5, basal to middle of penultimate section of M1. Bm-cu in line with CuA2, A1+CuA2 2.4X as long as CuA2; distance between apex of R2+3 and R4+5 0.5X as long as M1 beyond dm-cu ( Fig. 16 C). Halter yellow with brownish-yellow base.

Abdomen mostly blackish-brown, lightly pollinose, tergites 2–5 pale yellow with pale gray pollinosity apically. Pleuron pale gray. Epandrium blackish-brown. Genital fork brown with blackish-brown to black setulae; arms strongly divergent basally and convergent on distal 1/3, widest point across arms almost twice as wide as base at midpoint; basal tubercle absent; medial tubercle strong, broadly convex ( Fig. 16 D). Distiphallus inflated apically, glans absent. Pregonite long and slender, needle-like. Postgonite narrow and directed posteriorly, apex cuspate ( Fig. 16 GH).

Female. Body length 10.0–11.0 mm, wing length 8.0– 8.5 mm. Tergites 1–5 dull, pruinose blackish-brown with pale gray pollinosity apically; tergite 6 and oviscape shiny. Oviscape 1.4X length of tergite 6, blackish-brown with short blackish-brown setulae.

Type material. HOLOTYPE: CHINA, Yunnan Province: Baoshan, Baihualing, Wenquan, 1500 m, 29.v.2007, Xingyue Liu (♂, CAU). PARATYPE: CHINA, Yunnan Province: same data as holotype (1 ♂, 4 ♀, CAU); Baoshan, Baihualing, 12.v.2012, Yuanye Liu (1 ♂, CAU); Baoshan, Baihualing, 12.v.2012, Wenliang Li (2 ♂, CAU); Baoshan, Baihualing, 12.v.2012, Feiyang Liang (1 ♂, CAU).

Distribution. Oriental: China (Yunnan).

Remarks. Cothornobata longigonitea is similar to C. nigrigenu Enderlein , but differs in having a discal band anterior to R4+5, a slender and needle-like pregonite and a narrow, posteriorly directed, apically cuspate postgonite. C. nigrigenu has a wing discal band posterior to R4+5, an apically cuspate pregonite and a twisted, corkscrew-like postgonite.

Etymology. The specific name refers to the very long pregonite.

Figures

FIGURE 16. Cothornobata longigonitea 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.

FIGURE 17. Cothornobata longigonitea sp. nov., female. A, left lateral; B, spermathecae and associated structures. Scale bars = 1 mm. Abbreviations: ps, paired spermathecae; ss, single spermatheca.