Infraorder Brachyura - True CrabsPhylum Arthropoda - Arthropods
Subphylum Crustacea - Crustaceans
Class Malacostraca - Malacostracans
Superorder Eucarida - Eucarida (Crabs, Crayfish, Shrimp, etc.)
Order Decapoda - Crabs, Crayfishes, Lobsters, Prawns, and Shrimp
Infraorder Brachyura - True Crabs
Family Calappidae - Box crabs
Family Cancridae - Rock Crabs
Family Epialtidae - Kelp Crabs and Spider Crabs
Family Gecarcinidae - Land Crabs
Family Grapsidae - Marsh Crabs, Shore Crabs, and Talon Crabs
Family Hepatidae
Family Inachidae
Family Leucosiidae
Family Ocypodidae - Fiddler Crabs and Ghost Crabs
Family Panopeidae
Family Pilumnidae
Family Pinnotheridae - Pea Crabs
Family Portunidae - Swimming Crabs
Family Sesarmidae
Family Ucididae
Family Xanthidae - Mud Crabs
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