Longistyla, Zhang & Webb, 2019

Zhang, Bin & Webb, M. D., 2019, A checklist and key to the idiocerine leafhoppers (Hemiptera: Cicadellidae) of Hainan Island, with description of a new genus and new species, Zootaxa 4576 (3), pp. 581-587 : 583-584

Longistyla gen. nov.

Type species: Longistyla viraktamathi sp. nov.

Description. Coloration. Uniformly pale brown with basal triangles of scutellum black.

Morphology. Medium-sized leafhoppers, length 5.1 to 5.95 mm. Head slightly wider than pronotum; crown of uniform length, upper part of face and crown transversely rugose; face slightly wider across eyes than long, lateral margins of genae almost straight; ocelli situated at ends of lateral frontal sutures, closer to adjacent eyes than to each other; antennal flagellum without distal dilation in male; anteclypeus slightly projecting beyond genae, expanded apically, lateral margins slightly concave at midlength; lora small, slightly elevated above level of genae. Pronotum transversely rugose. Scutellum longer than pronotum. Forewing with 2 subapical cells, outer subapical cell closed, inner subapical cell open; appendix moderately broad. Hind femoral macrosetae 2+1, hind tibial macrosetae PD 21–23, AD 8–11, AV 9–12. Hind basitarsus with three platellae on distal transverse row.

Male genitalia. Pygofer elongate without dorsoanterior apodemes, processes absent; dorsoanterior fracture and anal collar (modified Xth segment) present, the latter simple. Subgenital plates ligulate, similar in length to pygofer, with a few marginal and surface setae. Style with short basal apophysis, distal apohysis very long, curved dorsally without setae. Connective T-shaped with very short stem. Aedeagus with dorsal apodeme poorly developed; preatrium present; aedeagal shaft simple with short projection on each side apically, gonopore apical, small.

Female genitalia. Female ovipositor slightly projecting beyond pygofer. Seventh sternite with convex posterior margin, medially emarginate. Second valvula elongate, of similar width throughout length, slightly curved dorsally, without dorsal hyaline region.

Distribution. Oriental ( China).

Diagnosis. Longistyla belongs to the Tasnimocerus genus group of Oriental genera with transverse rugae on the pronotum, which also includes Dianica Zhang , Jogocerus (also from Hainan), Niligiriscopus Viraktamath, Hyalinocerus Zhang & Li and Tasnimocerus Ghauri. Longistyla differs from Dianica in having two subapical cells on the forewings and the connective stem shorter than the combined width of the arms. It differs from both Niligiriscopus and Tasnimocerus in having a well-developed anal collar of the pygofer, which is absent in the latter two genera. It differs from Jogocerus in lacking male pygofer processes and other characters in the above key, and from Hyalinocerus in having an elongate style lacking setae.

Etymology. The generic name is derived from combination of two words longi + styla, meaning elongate and style, referring to the very long of the style. The gender of the genus is feminine.