Medetera lihuae, Tang, Chufei, Wang, Ning & Yang, Ding, 2016

Tang, Chufei, Wang, Ning & Yang, Ding, 2016, New species of Medetera from Inner Mongolia, China (Diptera, Dolichopodidae, Medeterinae), ZooKeys 604, pp. 117-144 : 130-133

Taxon classification Animalia Diptera Dolichopodidae

Medetera lihuae sp. n. Figs 6, 20-21, 35

Diagnosis.

Width of face about 1.5 times length of first flagellomere. Four pairs of dc in same length, four uniseriate acr. Vein M1+2 bent. CuAx ratio 1.0. Ventral surstylus long, wide, slightly narrow at apex, with row of ten ventral bristles at apical 1/4 and six thin apical bristles; dorsal surstylus wide and U-shaped apically, ventral lobe with row of six bristles, dorsal lobe with one preapical bristle. Cercus nearly rectangular, with one blade-like apical bristle, six times longer than wide.

Description.

Male (Fig. 6). Body length 2.1 mm, wing length 2.3 mm. Head: vertex, frons and face dark metallic green with gray pollinosity; eyes separated, face nearly parallel, width of face about 1.5 times length of first flagellomere. Hairs and bristles on head black except postocular bristles and posteroventral hairs pale yellow. Antenna (Fig. 20) black; first flagellomere nearly triangular, nearly as long as wide, with shortly brown pubescent; arista apical, black, bare, with basal segment extremely short, less than 0.1 times length of apical segment. Proboscis brown with pale white apical hairs; palpus wide, brown with 1 pale white apical bristle.

Thorax dark metallic green with gray pollinosity. Hairs and bristles on thorax black. Four pairs of dc in same length, four uniserate acr, two sa. Scutellum with two pairs of sc (median pair long strong). Legs all black except tips of mid and hind femora dark yellow. Hairs and bristles on legs mainly pale yellow. Fore coxa with six anterior bristles; mid and hind coxae each with one outer bristle at middle. Hind trochanter with one outer bristle at middle. Mid femur with six ventral bristles at basal half, of which middle three relatively long. Hind tibia expanded apically, with three short black apical bristles. Fore tarsomere 1 with row of 12 short ventral bristles; hind tarsomere 1 with row of 12 short dorsal and 12 short ventral bristles. Relative length of tibiae and five tarsomeres of legs LI: 2.7: 1.2: 1.0: 0.7: 0.4: 0.3; LII: 3.7: 2.5: 1.0:?:?:?; LIII: 4.0: 1.0:1.8: 1.0: 0.5: 0.5 (mid tarsomeres 3-5 missing). Wing nearly hyaline, tinged brown; veins brown, R4+5 and M1+2 convergent apically. M1+2 somewhat bent. CuAx ratio 1.0. Squama pale white with short pale white hairs. Halter pale yellow.

Abdomen dark metallic green with thin gray pollinosity. Hairs and bristles pale yellow. Male genitalia (Figs 21, 35): Mainly black except epandrial lobes, surstylus and cercus dark yellow to brown, phallus dark brown. Hairs and bristles yellow to pale white. Epandrium longer than wide; epandrial lobes forming one long digitation with two long thin apical bristles. Ventral surstylus long, wide, slightly narrow at apex, with row of ten ventral bristles at apical 1/4 and six thin apical bristles; dorsal surstylus wide and U-shaped apically, ventral lobe with row of six bristles, dorsal lobe with one preapical bristle. Cercus nearly rectangular, with one blade-like apical bristle, with long marginal bristles and external bristles, six times longer than wide. Hypandrium simple. Phallus thin, hidden within hypandrium.

Female. Unknown.

Types.

Holotype male, CHINA, Inner Mongolia, Helan Mountain, Shuimogou (N38°96'36.29", E105°85'78.64"), 1300 m, collected by sweeping nets in grass, 2010.VIII.4, Lihua Wang (CAU). Paratype: one male, same data as holotype (CAU).

Distribution.

Palaearctic: China (Inner Mongolia).

Remarks.

This new species is somewhat similar to Medetera ussuriana Negrobov, 1977 because they both have legs which are mainly black, they both have four strong dc of the same length and their CuAx ratio are both 1.0, but can be distinguished from the color and bristles of/on legs and the bristles on cercus. In Medetera ussuriana , the legs are all black except the trochanters yellow, the mid tibia has a pd and the cercus has one claw-like apical bristle ( Negrobov and Stackelberg 1977: p 350-351).

Etymology.

The species is named after the collector Lihua Wang.