''Optioservus'' was a genus of

riffle beetle 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 r ...

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 ...

; as of 2021 it is a junior synonym of '' Heterlimnius''. There were about 13 described species in ''Optioservus''.

Species

* '' Optioservus browni'' White, 1978 (Brown's optioservus riffle beetle) * '' Optioservus canus'' Chandler, 1954 (pinnacles optioservus riffle beetle) * '' Optioservus castanipennis'' (Fall, 1925) * '' Optioservus divergens'' (LeConte, 1874) * '' Optioservus fastiditus'' (LeConte, 1850) * '' Optioservus heteroclitus'' White, 1978 * '' Optioservus immunis'' (Fall, 1925) * '' Optioservus ovalis'' (LeConte, 1863) * '' Optioservus phaeus'' White, 1978 (Scott optioservus riffle beetle) * '' Optioservus quadrimaculatus'' (Horn, 1870) * '' Optioservus sandersoni'' Collier, 1972 * '' Optioservus seriatus'' (LeConte, 1874) * '' Optioservus trivittatus'' (Brown, 1930)

Species

References

Further reading