Daohugosargus, Zhang, 2012

Zhang, Junfeng, 2012, Orientisargidae fam. n., a new Jurassic family of Archisargoidea (Diptera, Brachycera), with review of Archisargidae from China, ZooKeys 238, pp. 57-76 : 62

Genus Daohugosargus gen. n.

Type species.

Sharasargus eximius KY Zhang, Yang & Ren, 2008

Included species.

The type species only.

Derivation of name.

Chinese, Daohugou, alluding to the fossil locality, and sargus, a common ending in archisargid genera (the masculine gender).

Diagnosis.

R1 long (more than four-fifths of wing length). R2+3 short, significantly S-shaped. Origin of Rs distad to d base. Rs fork nearly at level of d end. Crossvein r-m far basad to Rs fork, and meeting anterior margin of d distad to its midlength. M with three terminal branches. M1+2 bifurcated basad to d end. Cell cu open.

Remarks.

The present new genus differs from Uranorhagio by the short, S-shaped R2+3; the origin of Rs, which is distally of d base, the position of r-m, which is far basad to Rs fork, and meeting anterior margin of d distad to its midlength; and by the M with three terminal branches, on which M1+2 fork basad to d end.

On the other hand, Daohugosargus gen. n. is distinct from Sharasargus Mostovski, 1996 in that: origin of Rs distad to d base; very short, S-shaped R2+3; first fork of Rs nearly at level of d end; and r-m meeting Rs stem far basad to Rs fork.