A revision of the genus Oreodytes in North America (Coleoptera: Dytiscidae)

This is the first revision of the North American species of Oreodytes, a genus variously considered as distinct or as a subgenus of Hydroporus or Deronectes. The genus is most closely related to Deronectes, but several characters support separation of the two taxa. Deuteronectes Guignot is rejected...

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Bibliographic Details
Published in:Proceedings of the Academy of Natural Sciences of Philadelphia 1985-01, Vol.137 (1), p.99-127
Main Author: Zimmerman, J.R
Format: Article
Language:English
Subjects:
AMERICA DEL NORTE
AMERIQUE DU NORD
Circles
Cladistics
COLEOPTERA
Creeks
Dytiscidae
Entomology
Female animals
Freshwater
Genitalia
Male animals
NEW TAXA
NOMENCLATURA
NOMENCLATURE
NORTH AMERICA
Oreodytes
Oreodytes obesus
Parallel lines
Paratypes
TAXONOMIA
TAXONOMIE
TAXONOMY
ULTRAESTRUCTURA
ULTRASTRUCTURE
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Summary:This is the first revision of the North American species of Oreodytes, a genus variously considered as distinct or as a subgenus of Hydroporus or Deronectes. The genus is most closely related to Deronectes, but several characters support separation of the two taxa. Deuteronectes Guignot is rejected as a separate genus. Nearly all 16 species are confined to northwestern North America, but O. scitulus (LeConte) extends to the Atlantic Coast. The species prefer swiftly flowing mountain streams. A cladistic analysis is presented with three clades. The Scitulus group contains six species, the Angustior group has nine species, and O. quadrimaculatus (Horn) is in its own clade. Four new species are described, O. leechi, O. humboldtensis, O. rhyacophilus, and O. sierrae. O. obesus (Fall) is a subspecies of O. rivalis (Gyllenhal) and O. bisulcatus (Fall) is a subspecies of O. scitulus.
ISSN:0097-3157
1938-5293