Medetera furva, Tang, Chufei, Wang, Baohai & Yang, Ding, 2015

Tang, Chufei, Wang, Baohai & Yang, Ding, 2015, New species of Medetera (Diptera: Dolichopodidae, Medeterinae) from Tibet, Zootaxa 3946 (3), pp. 427-435 : 431-432

Medetera furva sp. nov.

( Figs 2, 8–10 )

Diagnosis. Antenna black ( Fig. 2). Legs all black. Cercus brownish, prolonged, dilated basally, with 1 long strong bristle at middle; hypandrium tapered in basal half, subparallel in apical half in ventral view ( Figs 9–10 ).

Description. Male ( Fig. 2). Body length 2.1 mm, wing length 2.0 mm. Head: vertex, frons and face dark metallic green, nearly black, with gray pollinosity; eyes separated, face nearly parallel, width of face about 1.5 times as long as first flagellomere. Hairs and bristles on head black, postocular bristles and posteroventral hairs pale, postocular bristles long strong. Antenna all black; first flagellomere small, rounded, black pubescent; arista subapical, long, black, basal segment short, less than 0.1 times as long as apical segment ( Fig. 8 ). Proboscis black, red-brownish at margin, with several thin radial brown stripes, with long weak brown hairs; palpus black, with 2 black apical bristles and short black hairs all around. Thorax dark metallic green, with grey pollinosity. Hairs and bristles black except bristles on lower portion of propleuron black to brown; 4 pairs of strong dc, 6 pairs of sparse acr. Scutellum with 2 pairs of sc, of which inner pair long strong. Legs all black. Hairs and bristles on legs black. Fore coxa with row of dorsal bristles and 1 weak outer bristle close to dorsum; mid coxa with row of dorsal bristles and 1 outer bristle at middle; hind coxa with 1 weak pd and 1 outer bristle at basal half. Fore trochanter with 1 av. Fore femur with row of 11–12 ventral bristles 0.8 times as long as diameter of fore femur; mid femur with row of 6 ventral bristles about 0.5 times as long as diameter of mid femur, hind femur with 1 preapical av and 1 preapical outer bristle. Mid tibia with 1 basal ad, row of dentate dorsal and ventral bristles and 2 short apical bristles. Hind tarsomere 1 with row of dentate dorsal and ventral bristles. Relative length of tibia and 5 tarsomeres of legs LI: 1.7: 0.7: 0.4: 0.3: 0.2: 0.3; LII: 2.2: 1.2: 0.6: 0.6: 0.4: 0.7; LIII: 2.8: 0.7: 1.6: 0.7: 0.3: 0.3. Wing nearly hyaline, tinged brown; veins brown, R4+5 and M1+2 convergent apically. CuAx ratio 0.67. Squama brownish with 5 pale hairs. Halter dark yellow. Abdomen dark metallic green with pale grey pollinosity. Segments 6 and 7 nearly same in length. Hairs and bristles black. Hypopygium ( Figs 9–10 ): Mainly brown; but hypandrium, phallus and surstylus lucidly yellow except basally. Hairs and bristles yellow to brown. Epandrium nearly trapeziform, distinctly longer than wide; 2 digitiform epandrial lobes each with 1 long strong apical bristle. Surstylus fused basally; ventral surstylus triangular apically with 2 short weak apical bristles; dorsal surstylus U-shaped apically; long and thin, thinner towards tip, with 2 short weak apical bristles. Cercus brownish, prolonged, dilated basally, thinner towards tip, with 1 long strong middorsal bristle and many marginal bristles, of which thick and thin basally. Hypandrium tapered in basal half, subparallel in apical half, apex rounded in ventral view. Phallus wide basally, thinner towards tip. Female. Unknown.

Type material. HOLOTYPE, ♂ labeled: China: Tibet, Nyingchi, Sejila mountain pass West (N29°57'09.33", E94°48'74.69"), 3573 m, collected by Malaise trap in grass, 2012. VIII.18–25, Baohai Wang and Zhaohui Pan ( CAU). PARATYPES: 3 ♂, same data as holotype ( CAU).

Distribution. Oriental: China (Tibet).

Remarks. The new species is somewhat similar to M. xizangensis Yang , but may be separated by the colour of the antenna and the shape of the cercus. In M. xizangensis , the antennal scape and pedicel are yellow; the cercus is obviously thinner towards tip, with lateral dentation, but without strong lateral bristles ( Yang 1999; Yang et al. 2011, fig. 252).

Etymology. The specific name refers to the colour of body and legs.

Figures

FIGURES 8 – 10. Medetera furva sp. nov., male. 8. Antenna; 9. genitalia, lateral view; 10. genitalia, ventral view. Abbreviations: epl = epandrial lobe, epn = epandrium, hyp = hypandrium, ph = phallus, sur = surstylus, cer = cercus. Scale bar = 0.2 mm.