Cybister rugosus

Family: Dytiscidae

Habitat: Wetland

General appearance: A large species, with total length of this specimen reaching 32.5mm. Distinct yellow lateral band on elytra and pronotum as of most Cybister spp. Hind coxal line distinct. Note that only female specimen of C.rugosus is presented here. Its distinct feature is presence of yellow markings on metacoxa and lateral margin on each segments of abdominal sternites.

 

Reference:
Pederzani, F. (1995). Keys to the identification of the genera and subgenera of adult Dytiscidae (sensu lato) of the world (Coleoptera Dytiscidae). Atti dell'Accademia Roveretana degli Agiati, a, 244, 5-83.