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Genus Orconectes

Propinquus - Orconectes propinquus - female Adult Rusty Crayfish - Orconectes rusticus O. virilis  - Orconectes virilis defensive crayfish - Orconectes immunis crayfish - Orconectes limosus Crayfish - Orconectes Crayfish - Orconectes Orconectes validus - female
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Crustacea (Crustaceans)
Class Malacostraca (Malacostracans)
Superorder Eucarida (Eucarida (Crabs, Crayfish, Shrimp, etc.))
Order Decapoda (Crabs, Crayfishes, Lobsters, Prawns, and Shrimp)
Infraorder Astacidea (Crayfishes and Lobsters)
Superfamily Astacoidea (Crayfishes)
Family Cambaridae
Genus Orconectes
Internet References

'The Propinquus Group of the Crawfish Genus Orconectes', J.F. Fitzpatrick, Jr.; (The Ohio Journal of Science, Vol. 67, No. 3, May 1967)