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|Noun||1.||malacostracan crustacean - a major subclass of crustaceans |
crustacean - any mainly aquatic arthropod usually having a segmented body and chitinous exoskeleton
Malacostraca, subclass Malacostraca - largest subclass of Crustacea including most of the well-known marine, freshwater, and terrestrial crustaceans: crabs; lobsters; shrimps; sow bugs; beach flies
krill - shrimp-like planktonic crustaceans; major source of food for e.g. baleen whales
opossum shrimp - shrimp-like crustaceans whose females carry eggs and young in a pouch between the legs
isopod - any of various small terrestrial or aquatic crustaceans with seven pairs of legs adapted for crawling
amphipod - a kind of malacostracan crustacean
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