#genus_Ceratodus  type genus of the Ceratodontidae: extinct genus of lungfishes
  supertype:  fish_genus  any of various genus of fish
  member:  ceratodus
  member of:  family_Ceratodontidae__Ceratodontidae  lungfishes having hornlike ridges on the teeth
     member of:  subclass_Dipnoi__Dipnoi  bony fishes of the southern hemisphere that breathe by a modified air bladder as well as gills; sometimes classified as an order of Crossopterygii
        member of:  class_Osteichthyes__Osteichthyes  a class of fish having a skeleton composed of bone in addition to cartilage
           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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