Macronychus glabratus

Macronychus glabratus is a species of riffle beetle in the family Elmidae. It is found in North America.^[1][2][3]

Macronychus glabratus
Macroncychus glabratus
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Coleoptera
Suborder:	Polyphaga
Infraorder:	Elateriformia
Family:	Elmidae
Genus:	Macronychus
Species:	M. glabratus
Binomial name
Macronychus glabratus Say, 1825
Synonyms[1]
Macronychus lateralis Melsheimer, 1844

Page with M. glabratus larvae (left two images, dorsal and ventral aspects) compared with Zaitzevia parvula larvae (right two images, dorsal and ventral aspects)