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)References
Further reading
* * * Elmidae Elateriformia genera {{Elateriformia-stub