Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
   Gnathostomata
     Class Chondrichthyes Huxley, 1880 - cartilaginous fishes
       Subclass Elasmobranchii Bonaparte, 1838 - shark-like fishes see Infraclass Elasmobranchii Bonaparte, 1838
         Order †Eugeneodontida see Order Eugeneodontiformes Zangerl, 1981
           Superfamily †Edestoidea Jaekel, 1899 see Suborder Edestoidei
             1 Family †Agassizodontidae Zangerl, 1981 see Family Helicoprionidae Karpinsky, 1911
             2 Family †Edestidae Leidy, 1857