Uranorhagio daohugouensis, Zhang & Yang & Ren & Shih, 2010, Zhang & Yang & Ren & Shih, 2010

Zhang, Kuiyan, Yang, Ding, Ren, Dong & Shih, Chungkun, 2010, An evolutional special case in the lower Orthorrhapha: some attractive fossil flies from the Middle Jurassic of China (Insecta: Diptera: Brachycera), Zoological Journal of the Linnean Society 158 (3), pp. 563-572 : 565-566

URANORHAGIO DAOHUGOUENSIS ZHANG, YANG & REN GEN. ET SP. NOV. ( FIGS 1 , 2 )

Etymology: The specific name refers to the type locality: Daohugou Village, Inner Mongolia, China.

Diagnosis: The same as Uranorhagio gen. nov.

Holotype: CNU-DIB-NN2007016, an almost complete adult body with a wing in lateral view.

Paratype: CNU-DIB-NN2007017, an almost complete adult body with a wing in lateral view.

Type locality and horizon: Daohugou Village, Shantou Township, Ningcheng County, Inner Mongolia, China; Jiulongshan Formation, the Middle Jurassic (Aalenian–Bajocian).

Description: Body length, 18.0– 21.7 mm; wing length, 13.5–18.0 mm; wing width, 4.2–5.7 mm.

Body stout. Head round, slightly narrower than thorax. Eyes large, bare; ommatidia visible clearly.

Mesonotum slightly convex. Legs pubescent. Femora and tibiae of fore and mid-legs slender; fore tibia with a spur; hind femur robust, strongly swollen at apical part, hind tibia with two spurs; first tarsomere distinctly longer than following tarsomeres, empodium pulvilliform.

Wing hyaline, slender relative to body; veins thick and strong. Vein Sc ending slightly beyond middle of wing. Veins R 1 and Rs 1 long; vein R 2+3 distinctly and strongly bent upwards at base; veins R 2+3, R 4, and R 5 straight and parallel with each other (except for bases of veins R 2+3 and R 4); beginning of vein R 4 proximal to apex of cell d; vein R 5 ending at wing apex. Crossvein r–m at basal 3/7 of cell d, distal to beginning of vein R 2+3; relative length of veins Rs 1, Rs 2, and Rs 3 about 3.5: 1: 2.5 to 4.5: 1: 4. Veins M 1 and M 2 bifurcating distal of crossvein m–m, with base of vein M 1 curved upwards; vein M 3 short. Vein CuA 1 arising from cell bm. Anal lobe with several veins (or just some creases of wing). Mouths of cells sc and r 1 wide; mouths of cells r 2+3 and r 4 distinctly narrower; cell r 4 much narrower. Cell bm slightly wider than cell br; cell d large, nearby wing margin, curved quadrangle. Five posterior cells present and wide open; mouths of cells m 1 and m 2 subequal in length; mouth of cell m 3 narrow, about 1/5–1/2 as wide as that of cell cua 1. Cell cup distinctly open; anal lobe small and narrow.

Abdomen robust, pubescent. Nine segments visible; segment I evidently shortest.

Figures

Figure 1. Uranorhagio daohugouensis sp. nov. Holotype, body with a wing in lateral view. A, photograph. B, camera lucida drawing.

Figure 2. Uranorhagio daohugouensis sp. nov. Paratype, body with a wing in lateral view. A, photograph. B, camera lucida drawing.