Heterelmis
Guides
Heterelmis obesa
riffle beetle
Heterelmis obesa is a species of riffle beetle in the family Elmidae, first described by Sharp in 1882. It is one of the most widely distributed species in the genus Heterelmis, occurring across Central America, North America, and South America. The species is recognized as having two subspecies: Heterelmis obesa obesa and Heterelmis obesa plana Hinton, 1936. Like other elmid beetles, it is adapted to aquatic environments with flowing water.