#physa  any member of the genus Physa
  supertype:  #gastropod__univalve  a class of mollusks typically having a one-piece coiled shell and flattened muscular foot with a head bearing stalked eyes
  member of:  #genus_Physa  type genus of the physidae; freshwater air-breathing snails
     member of:  #family_Physidae__Physidae  freshwater snails
        member of:  #order_Pulmonata__Pulmonata  large order of gastropods usually breathing by means of a lung-like sac comprising most land snails and slugs and many freshwater snails
           member of:  #class_Gastropoda__Gastropoda__Gasteropoda__class_Gasteropoda  snails and slugs and their relatives
              member of:  #phylum_Mollusca__Mollusca  gastropods; bivalves; cephalopods; chitons
                 member of:  #kingdom_Animalia__Animalia__animal_kingdom  taxonomic kingdom comprising all living or extinct animals

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