Strenorhagio, 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 : 566

STRENORHAGIO GEN. NOV.

Etymology: The generic name is derived from the Greek ‘S tren ’ (stout) and the genus ‘ Rhagio ’ (rhagionid fly).

Type species: Strenorhagio deviatus sp. nov. Included species: Strenorhagio deviatus sp. nov., S. grimaldi sp. nov., S. asymmetricus sp. nov., and S. conjugovenius sp. nov.

Diagnosis: Body stout. Vein R 2+3 distinctly and strongly bent upwards at base; crossvein r–m at basal third of cell d, proximal to or coalesced with beginning of vein R 2+3, beginning of vein R 4 distal to apex of cell d; all branches of vein M long, veins M 1 and M 2 bifurcating distal to crossvein m–m; vein CuP present; cell r 4 wider than in Uranorhagio gen. nov.; cell d slender, far from wing margin.

Distribution: The genus is known only from China, and is currently represented by four species.

Remarks: We treat Strenorhagio gen. nov. as the second genus of family Uranorhagionidae fam. nov., because it has the following characters: body stout; hind tibia with a spur; veins R 1 and Rs 1 long; vein R 2+3 strongly bent upwards at base; veins M 1 and M 2 bifurcating distal to crossvein m–m; five posterior cells present and wide open, etc. However, we can easily separate it from Uranorhagio gen. nov. by the following features: vein R 4 beginning distal to apex of cell d; crossvein r–m at basal third of cell d, proximal to or coalesced with beginning of vein R 2+3; all branches of vein M long; cell r 4 wider than that in Uranorhagio gen. nov.; cell d slender, far from wing margin. In Uranorhagio gen. nov., vein R 4 begins proximal to the apex of cell d, crossvein r–m is located at the basal 3/7 of cell d, distal to the beginning of vein R 2+3; at least vein M 3 is short; cell r 4 is much narrower.