#order_Sauropterygia__Sauropterygia  extinct marine reptiles: plesiosaurs; nothosaurs
  supertype:  animal_order  the order of animals
  member:  suborder_Plesiosauria  suborder_Nothosauria
  member of:  subclass_Archosauria__Archosauria  a large subclass of diapsid reptiles including: crocodiles; alligators; dinosaurs; pterosaurs; plesiosaurs; ichthyosaurs; thecodonts
     member of:  class_Reptilia__Reptilia  class of cold-blooded air-breathing vertebrates with completely ossified skeleton and a body usually covered with scales or horny plates; once the dominant land animals
        member of:  subphylum_Vertebrata__Vertebrata__Craniata__subphylum_Craniata  fishes; amphibians; reptiles; birds; mammals
           member of:  phylum_Chordata__Chordata  comprises true vertebrates and animals having a notochord
              member of:  kingdom_Animalia__Animalia__animal_kingdom  taxonomic kingdom comprising all living or extinct animals

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