Cothornobata fusca, 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 : 209

2. Cothornobata fusca sp. nov.

( Fig. 3 )

Diagnosis. Mostly brownish-yellow. Arista bare. Wing discal band rather small, reached to middle of penultimate section of M 1, basal to dm-cu. Arm of genital fork bowed at base and subparallel on distal 2 / 3, basal tubercle broadly convex. Postgonite long and strongly bent, creating a “V-shape”.

Description. Male. Body length 10.5 mm, wing length 7.5 mm.

Head mostly subshiny brownish-yellow with very thin gray pollinosity. Frontal vitta yellow, densely microsetulose, about 1 / 2 width of frons; lower orbital plate dull pollinose; ocellar triangle brown; lunule orange; face yellow, with fine microsetulae; gena light brown, lightly pollinose; clypeus uniformly brown, shiny. Setae and setulae on head black; postgena with 1 strong seta at lower margin. Antenna pale yellow; first flagellomere 1.3 X longer than wide; pedicel with 1 ventral apical seta more than half length of first flagellomere; arista nearly 2.5 X length of first flagellomere, brown and bare. Proboscis brownish-yellow with brown apex, setulae brown to black. Palpus yellow, setulae black.

Thorax brownish-yellow with pale gray pollinosity. Scutellum slightly convex, angled dorsally. Setae on thorax black, setulae blackish; katepisternum with 3 strong setae.

Fore and mid legs missing from unique type. Hind leg mostly yellow, except femur brown on apical 1 / 5, tibia with brown basal ring and darkened on apical half, tarsus brown.

Wing light brown, distal band dark brown, reached to middle of distal section of M 1 but strongly paled posterior to M 1 and with minor pale strip between R 2 + 3 and R 4 + 5; discal band much light than distal band, covered M 1 but posterior to R 4 + 5, reached to middle of penultimate section of M 1, basal to dm-cu. Bm-cu in line with CuA 2, A 1 +CuA 2 3.4 X as long as CuA 2; distance between apex of R 2 + 3 and R 4 + 5 0.3 X as long as M 1 beyond dm-cu ( Fig. 3 C). Halter pale yellow but dark yellow at base.

Abdomen mostly brownish-yellow with pale gray pollinosity, tergites 2 and 3 yellow with dense pale gray pollinosity apically. Pleuron pale gray. Epandrium brownish-yellow. Genital fork pale yellow to brownish-yellow; arm long, bowed at base and subparallel on distal 2 / 3; basal tubercle broadly convex, medial tubercle indistinctly convexly differentiated ( Fig. 3 D). Distiphallus slightly shorter than phallapodeme, terminating in curved filaments, not inflated apically. Pregonite expanded. Postgonite long and strongly bent, creating a “V-shape” (viewed ventrally) ( Fig. 3 GH).

Female. Unknown.

Type material. HOLOTYPE: CHINA, Hainan Province: Ledong, Jianfengling, 5–7.vi. 2007, Erqiong Wen (♂, CAU).

Distribution. Oriental: China (Hainan).

Remarks. Cothornobata fusca is similar to C. breviseta sp. nov. and C. fusca sp. nov., but differs as follows: arista bare; wing discal band small and reaching middle of penultimate section of M 1, basal to dm-cu; arm of genital fork bowed at base and subparallel on distal 2 / 3, basal tubercle broadly convex; postgonite long and strongly bent, creating a “V-shape”.

Etymology. The specific name refers to the brownish-yellow body colour.

Figures

FIGURE 3. Cothornobata fusca 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.