Chaetarthria sp.

Family: Hydrophilidae
Subfamily: Hydrophilinae
Tribe: Chaetarthriini

Habitat: Wetland

General appearance: Small species. Body broadly oval and rounded, strongly convex, almost semiglobular. Antennae 8-segmented with long scape, and the last segment abruptly narrowed subapically which appears to carry a small accessory segment at the apex. Prosternum very short. Elytra with a sutural stria at the posterior half.

 

Reference:
Hansen, M. (1991). The hydrophiloid beetles: phylogeny, classification and a revision of the genera (Coleoptera, Hydrophiloidea) (Vol. 40). Kgl. Danske Videnskabernes Selskab.