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Infraorder Astacidea - Crayfishes and Lobsters

Cambarus diogenes - male Crayfish Burrowing Crayfish crayfish Crayfish - male Cray sp??? - male crayfish - Procambarus fallax crawfish - male
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)
Numbers
freshwater crayfish: worldwide ~670 spp. in 5 families grouped in 2 superfamilies(1)