Colymbetinae
Guides
Nartus
Nartus is a genus of predaceous diving beetles (family Dytiscidae) comprising at least two described species: Nartus grapii and Nartus sinuatus. The genus was reinstated by Balke et al. in 2017 to accommodate species formerly placed in Rhantus, based on molecular and morphological evidence distinguishing them from that genus. As members of the subfamily Colymbetinae, these beetles are aquatic predators inhabiting freshwater environments.
Rhantus sericans
Rhantus sericans is a predaceous diving beetle in the family Dytiscidae, first described by Sharp in 1882. The species is distributed across North America and has been recorded from the Holarctic region, including the Canadian province of Alberta. As a member of the genus Rhantus, it belongs to a group of diving beetles adapted to aquatic environments. The species is represented by 88 observations on iNaturalist, indicating it is documented but not exceptionally common in citizen science records.