Asymmetrasca Dlabola

Liu, Yang, Fletcher, Murray J., Dietrich, Christopher H. & Zhang, Ya-Lin, 2014, New species and records of Asymmetrasca (Hemiptera: Cicadellidae: Typhlocybinae: Empoascini) from China and name changes in Empoasca (Matsumurasca), Zootaxa 3768 (3), pp. 327-350 : 328

Asymmetrasca Dlabola , reinstated genus

Asymmetrasca Dlabola 1958: 51 . Type species: Empoasca decedens Paoli.

Empoasca Walsh , in part; Dworakowska, 1968: 566; Nast 1972: 264. Synonymised by Dworakowska, 1968.

Diagnosis. Small, green Empoascini resembling Empoasca in external morphology but differing as follows: male subgenital plate narrow at base, lacking angulate dorsolateral projection, setal group A arising far from base of plate; anal hook usually with small apical denticuli; aedeagus with well developed dorsal apodeme, shaft as long as or longer than preatrium with single long asymmetrical process arising at apex and extended basolaterad.

Notes. Asymmetrasca was listed as a junior synonym of Empoasca by Nast (1972) and this interpretation has was followed by the principal taxonomic worker on Palearctic Typhlocybinae ( Dworakowska 1982) , although other recent authors, mostly in the economic entomology literature (e.g., Jacas et al. 1997), have continued to recognize Asymmetrasca as a valid genus. As noted above, species of the genus differ substantially from the type species of Empoasca in the structure of the male subgenital plate and aedeagus. Therefore, we recognize Asymmetrasca as a valid genus, distinct from Empoasca , sensu stricto. Asymmetrasca appears to be restricted to the Palearctic and Oriental regions and includes 10 previously described species and 6 new species described below. The described species are very similar morphologically, differing mainly in the relative shape, proportions and ornamentation of the aedeagal shaft, preatrium and apical process.