A subdivision of decapod Crustacea, having the stomach mainly created. It provides the lobster, prawn, shrimp, and many similar kinds. Cf. decapoda.
A subordinal or superfamily selection of stalk-eyed thoracostracous crustaceans of the purchase Decapoda, containing those that tend to be long-tailed, because the lobster, crawfish, prawn, shrimp, etc.: distinguished from Brachyura and Anomura.