A Revision of the Nearctic Optioservus (Coleoptera: Elmidae), with Descriptions of New Species

White DS. 1978. A Revision of the Nearctic Optioservus (Coleoptera: Elmidae), with Descriptions of New Species. Systematic Entomology. 3:59-74

ABSTRACT: Previous works on the nearctic Optioservus have relied on extremely variable external characters making specific identifications quite difficult. This revision is based on male genitalia, elytral patterns and shape, and geographic distribution. Keys and descriptions are presented for thirteen species: O.browni sp.n., O.canus, O.castanipennis, O.divergens [=pecosensissyn.n.], O.fastiditus, O.heteroclitussp.n., O.immunis [=cryophilussyn.n.], O.ovalis [=ampliatussyn.n.], O.phaeussp.n., O.quadrimaculatus, O.sandersoni [=ozarkensissyn.n.], O. seriatus, O.trivittatus.

Type
Journal Article
Authors
White, David
Units
SEQU
Keywords
Coleoptera, Elmidae, Insecta, new species, Optioservus heteroclitus

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