Cothornobata breviseta, 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 : 207-209

1. Cothornobata breviseta sp. nov.

( Fig. 2 , 25 B)

Diagnosis. Mostly brown. Wing discal band as dark as distal band, distal band without pale strip between R2+3 and R4+5. Apical 2/3 of fore femur black, fore tibia yellow to brown with darker base and apex. Abdominal pleura 1–5 with gray subquadrate pigmentation pattern. Arm of genital fork incurved apically, basal tubercle papillary.

Description. Male. Body length 13.0–15.0 mm, wing length 9.0–10.0 mm.

Head mostly subshiny brownish-yellow with very thin gray pollinosity. Frontal vitta dark yellow, densely microsetulose, about 2/3 width of frons; lower orbital plate dull pollinose; ocellar triangle black; median occipital sclerite with large dark yellow spot; lunule orange; face yellow, with fine microsetulae; gena yellow, lightly pollinose; clypeus mostly dark brown, brownish-yellow laterally, shiny. Setae and setulae on head black. Antenna pale yellow; first flagellomere 1.5X longer than wide; pedicel with 1 ventral apical seta nearly half length of first flagellomere; arista nearly 3.4X length of first flagellomere, blackish-brown with yellow base, long pubescent with distal half bare. Proboscis brownish-yellow with brown apex, setulae brown. Palpus yellow, setulae black.

Thorax mostly brown with black spots, with pale gray pollinosity. Scutellum slightly convex, angled dorsally. Setae on thorax black, setulae blackish; katepisternum with 3 to 4 strong setae.

Legs mostly yellow, except apical 2/3 of fore femur, apical 1/3 of mid femur and apical 1/4 of hind femur black; tibiae yellow to brown with darker base and apex; tarsi black, except mid basitarsus pale yellow with black tip.

Wing brown with distal and discal bands dark brown; distal band reached to the middle of distal section of M1; discal band along M1 but posterior to R4+5, reached to middle of r-m and dm-cu. Bm-cu in line with CuA2, A1+CuA2 twice as long as CuA2; distance between apex of R2+3 and R4+5 1/ 3X as long as M1 beyond dm-cu ( Fig. 2 C). Halter pale yellow with base dark yellow.

Abdomen brownish-yellow with pale gray pollinosity on tergites 1–6, tergites 5 and 6 shiny, sternite 8 and epandrium microsetulose; tergites 2–4 pale yellow apically. Pleuron pale gray, pleura 1–5 with gray subquadrate pigmentation pattern. Epandrium blackish-brown. Genital fork brownish-yellow except yellow apex; arm long and incurved apically; basal tubercle papillary, medial tubercle very weak, inconspicuous ( Fig. 2 D). Distiphallus as long as phallapodeme, terminating in curved filaments, not inflated apically. Pregonite expanded. Postgonite narrow and apically out-turned, slightly angled laterally (viewed ventrally). ( Fig. 2 GH).

Female. Body length 14.0–16.0 mm, wing length 9.0–11.0 mm. Tergites 1–3 dull, pruinose blackish-brown, tergite 5, tergite 6 and oviscape shiny, with sparse black setulae. Oviscape 1.4X length of tergite 6, blackish-brown with short blackish-brown setulae.

Type material. HOLOTYPE: VIETNAM, Thua Thien Hue: Phu Loc District, Bach Ma National Park, 520m, 4.vi.2012, Xingyue Liu (♂, CAU). PARATYPES: VIETNAM, Ninh Binh: Cuc Phuong National Park 20°21'13"N, 105°35'14"E, 350–500m, 30.iv-8.v.2013, S.A. Marshall and S.M. Paiero (5 ♂, 14 ♀, DEBU, IEBR); Bac Giang: Lac Khe Ro Forest, 21°20''28"N, 106°58'0"E, 75–150m, 18-15.v.2013, S.A. Marshall and S. M. Paiero (1 ♂, DEBU).

Distribution. Oriental: Vietnam (Bac Giang, Ninh Binh, Thua Thien Hue).

Remarks. Cothornobata breviseta is similar to C. shuimanensis sp. nov. and C. fusca sp. nov., but the wing lacks a pale strip between R2+3 and R4+5 and has the discal band as dark as the distal band, the apical 2/3 of the fore femur is black, the fore tibia is yellow to brown with a darker base and apex, and the genital fork has incurved arms and finger-like basal tubercles.

Etymology. The specific name refers to the short setulae of the genital fork.

Figures

FIGURE 2. Cothornobata breviseta 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 25. Cothornobata females from Vietnam (Cuc Phuong National Park, May 2013, S. A. Marshall). A, C. paieroi sp. nov., with attached pseudoscorpion, B, C. breviseta sp. nov., ovipositing in sappy decaying wood.