''Macrelmis'' is a genus of

riffle beetle Elmidae, commonly known as riffle beetles, is a family (biology), family of beetles in the superfamily Byrrhoidea described by John Curtis (entomologist), John Curtis in 1830. Both adults and larvae are usually aquatic, living under rocks in fas ...

s in the family

Elmidae Elmidae, commonly known as riffle beetles, is a family of beetles in the superfamily Byrrhoidea described by John Curtis in 1830. Both adults and larvae are usually aquatic, living under rocks in fast-flowing shallow areas of streams, such as ...

. There are at least three described species in ''Macrelmis''.

Species

* ''

Macrelmis moesta ''Macrelmis moesta'' is a species of riffle beetle in the family Elmidae. It is found in North America. References Further reading * * Elmidae Articles created by Qbugbot Beetles described in 1870 {{Elateriformia-stub ...

'' (Horn, 1870) * ''

Macrelmis shoemakei ''Macrelmis shoemakei'' is a species of riffle beetle in the family Elmidae. It is found in Central America and North America. References Further reading * * * Elmidae Articles created by Qbugbot Beetles described in 1971 {{ ...

'' (Brown, 1971) * ''

Macrelmis texana ''Macrelmis texana'' is a species of riffle beetle in the family Elmidae. It is found in Central America and North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. ...

'' (Schaeffer, 1911)