where are the walking legs of crustaceans found
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Crustacean [SEP] Introduction
Crustaceans (Crustacea ) form a large, diverse arthropod taxon which includes such animals as crabs, lobsters, crayfish, shrimps, prawns, krill, woodlice, and barnacles. The crustacean group can be treated as a subphylum under the clade Mandibulata; because of recent molecular studies it is now well accepted that the crustacean group is paraphyletic, and comprises all animals in the clade Pancrustacea other than hexapods. Some crustaceans are more closely related to insects and other hexapods than they are to certain other crustaceans. The 67,000 described species range in size from "Stygotantulus stocki" at , to the Japanese spider crab with a leg span of up to and a mass of .