Genus Ceratogergithus Gnezdilov, 2017

Type species.

Ceratgergithus spinosus (Che, Zhang & Wang, 2007).

Diagnosis.

Vertex subsquare or transverse. Metope wide, without median carinae. Postclypeus with distinct median carinae, elevated above the level surface of base of the frons (Figs 6, 7) or without carinae (Chen et al. 2014: figs 2 –14D–E, 2 –15D–E). Forewings without claval suture and shoulder-like projections (Chen et al. 2014: figs 2 –14A–C, 2 –15A–C) or with claval suture developed through its whole length, basally depressed (Figs 1, 2). Hindwing one lobed, longer than half length of forewing. Pygofer of male symmetrical (in lateral view), posterior margin with a large horn-shaped process in upper half. Anal tube of male apically enlarged (in dorsal view).

Distribution.

China: Hainan, Yunnan.

Discussion.

This genus is similar to Gergithus and Neohemisphaerius, but can be clearly separated from Gergithus by the posterior margin of the pygofer with a large horn-shaped process (Fig. 12) and the aedeagus without pair of short ventral directed toward its apex. It differs from the genus Neohemisphaerius by having a frons without a median carina, with colored marking, a hindwing well developed and longer than half the length of the forewing, and venation reticulate.