Cercyon sp.1
Family: Hydrophilidae
Subfamily: Sphaeridiinae
Tribe: Megasternini
Habitat: Wetland
General appearance: Small size. Elytra with 10 punctated striae. Antennae 9-segmented with club. Pronotum finely punctated. Prosternal process with a small notch apically. Prosternum tectiform with well defined antennae grooves. Middle and hind tibia flattened without pubescence. Mesosternal plates elongated oval.
Reference:
Hansen, M. (1991). The hydrophiloid beetles: phylogeny, classification and a revision of the genera (Coleoptera, Hydrophiloidea) (Vol. 40). Kgl. Danske Videnskabernes Selskab.