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decapod
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decapod squat lobster crustacean: anatomy
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decapod
decapod Masked crab (Corystes cassivelanus), Belgian coast.

decapod

crustacean
Also known as: Decapoda
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History

decapod, (order Decapoda), any of more than 8,000 species of crustaceans (phylum Arthropoda) that include shrimp, lobsters, crayfish, hermit crabs, and crabs. The presence of five pairs of thoracic legs (pereiopods) is the basis for the name decapod (from the Greek meaning “10 legs”). Members of the order exhibit great diversity in size and structure. The macrurous (shrimplike) species, which can be as small as 1 cm (0.5 inch), have elongated bodies with long abdomens,...

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