Oxycera ningxiaensis, Zai-Hua, Yang, Jin-Yong, Yu & Mao-Fa, Yang, 2012

Zai-Hua, Yang, Jin-Yong, Yu & Mao-Fa, Yang, 2012, Two new species of Oxycera (Diptera, Stratiomyidae) from Ningxia, China, ZooKeys 198, pp. 69-77 : 72-73

Oxycera ningxiaensis sp. n. Figures 1-6

Holotype.

♂, Ningxia Hui Autonomous Region, JingYuan County, Liupanshan natural reserves, Dongshanpo, 2100 m, N35o36.767, E106o16.189, 28.viii.2009, Z.-H. Yang leg.

Paratypes.

3♂♂, the same locality labels as the holotype, all in GUGC.

Diagnosis.

Dark species with brownish yellow postpronotal callus, scutellar spines, postalar callus and narrow upper margin of anepisternum. Body hairs black, R4 present, legs mostly dark to black but bases and tips of coxae, femora and tibiae yellow, tarsi black but 1-2 basal tarsomeres on mid and hind tarsus yellow.

Description.

Male (Figs 1-6). Length: body 4.8-5.2 mm, wing 4.3-5.0 mm. Head elliptical in frontal view, shining black, with black hairs; slightly broader than thorax, 1.4 times as long as high in profile and 0.8 times as high as broad. Vertex and ocellar tubercle black, both with black hairs. Ocelli and contiguous eyes brown, nearly bare, slightly darker in lower part, upper facets distinctly larger than lower. Frons shiny black; face black with some punctures and pale hairs, and a white lateral pollinose stripe on each side along eyes. Antenna dark brown to black, relative length of antennal scape, pedicel and flagellum (without arista) 3:5:10, relative width 7:9:10; arista about equal to length of rest of antenna. Occiput shiny black with some black hairs. Proboscis pale and palpus dark brown, both with some pale hairs.

Thorax (Figs 1, 2) mostly shining black, densely punctate and black haired; postpronotal callus, scutellar spines, postalar callus and narrow upper margin of anepisternum yellowish brown; length of scutellar spines only 1/4 as long as scutellum length. Wing black, stigma and veins darker than the mambrane, vein R4 present. Legs mostly dark brown to black, but each femur and tibia with yellow base and apex, mid and hind tarsi 1 yellow; legs wholly with short pale hairs. Halter yellow with yellowish brown base.

Abdomen (Figs. 1, 2) about as long as thorax, shining black, densely punctate, tergites 1-2 with dense black hairs, tergites 3-5 only with sparse pale hairs; similar hairs on venter. Male terminalia: epandrium trapezoidal (Fig. 3), its base narrower than tip, apical margin with sparse short hairs; proctiger elongate-oval, genital capsule with high medial process at hind margin (Fig. 6); aedeagal complex (Figs. 4, 5) bilobate, each lobe narrowed and pointed apically.

Female. Unknown.

Remarks.

This new species is very similar to Oxycera qiana Yang et al. 2009. Both are black but the new species is slender, with the scape and pedicel black, the male eyes are only sparsely haired or bare, and the male terminalia are species-specific (Figs 3-6). Oxycera qiana is stouter, with a somewhat paler scape and pedicel and densely haired eyes. The male terminalia are of quite different shape (cf. Figs 7-11 in Yang et al. 2009), i.e. the genital capsule is narrowed distally and without a medial process, and the aedeagal complex is trilobate.

Etymology.

The species is named after the type locality Ningxia in the Hui Autonomous Region.

Distribution.

China (Ningxia).