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Family Porcellanidae - Porcelain Crabs

crab petrolisthes eriomerus - Petrolisthes eriomerus Petrolisthes armatus? - Petrolisthes armatus Polyonyx gibbesi Polyonyx gibbesi Polyonyx gibbesi Pachycheles rudis Pachycheles rudis
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 Anomura (Hermit Crabs and Mole Crabs)
Superfamily Galatheoidea
Family Porcellanidae (Porcelain Crabs)
Identification
Adults recognized by reduced hind legs curled around abdomen, leaving only three pairs of walking legs:


Zoea instantly recognizable based on extremely elongated rostrum: