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Family Cambaridae

Crayfish - Cambarus robustus crayfish - Orconectes limosus Reddish crayfish moving around mostly above water before entering burrow perhaps - Procambarus clarkii Procambarus clarkii - male Crayfish - Cambarus Crayfish - Orconectes virilis Crayfish Burrowing Crayfish
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
Explanation of Names
Author: Hobbs, 1942
Numbers
According to Wikipedia, the world's greatest diversity of crayfish species is found in southeastern North America, with over 330 species in nine genera, all in the family Cambaridae.