#malacostracan_crustacean__malacostracancrustacean  a major subclass of crustaceans
  supertype:  #crustacean  any mainly aquatic arthropod usually having a segmented body and chitinous exoskeleton
  member of:  #subclass_Malacostraca
  subtype:  #krill  shrimp-like planktonic crustaceans; major source of food for e.g. baleen whales
     subtype:  #Euphausia_pacifica  food for jellyfish
  subtype:  #opossum_shrimp__opossumshrimp  shrimp-like crustaceans whose females carry eggs and young in a pouch between the legs
  subtype:  #isopod  any of various small terrestrial or aquatic crustaceans with seven pairs of legs adapted for crawling
     subtype:  #woodlouse__slater  any of various small terrestrial isopods having a flat elliptical segmented body; found in damp habitats
        subtype:  #pill_bug  small terrestrial isopod with a convex segmented body that can roll up into a ball
        subtype:  #sow_bug__sowbug  terrestrial isopod having an oval segmented body (a shape like a sow)
     subtype:  #sea_louse__sealouse__sea_slater__seaslater  marine isopod crustacean
  subtype:  #amphipod  a kind of malacostracan crustacean
     subtype:  #beach_flea__beachflea__sand_hopper__sand_flea  small amphipod crustaceans that hop like fleas; common on ocean beaches
     subtype:  #skeleton_shrimp  small amphipod crustacean having a grotesque form suggestive of the praying mantis; found chiefly on seaweed
     subtype:  #whale_louse__whalelouse  amphipod crustacean parasitic on cetaceans

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