Phylum Chordata Bateson, 1885 - chordates
Count: -
   Subphylum Vertebrata Cuvier, 1812 - vertebrates
  Count: -
     Pisces
    Count: [*] 5c58o469f; †4c41o87f
       Class Chondrichthyes Huxley, 1880 - cartilaginous fishes
      Count: -
         Subclass Holocephali Bonaparte, 1832
        Count: [*] 1o3f; †8o4f
           Order Chimaeriformes Obruchev, 1953 - chimaeras
          Count: -
           Order †Chondrenchelyiformes Moy-Thomas, 1939
          Count: -
           Order †Copodontiformes Obruchev, 1953
          Count: -
           Order †Edestiformes see Order Eugeneodontiformes Zangerl, 1981
          Count: -
           Order †Helodontiformes Patterson, 1965
          Count: -
           Order †Iniopterygiformes Zangerl & Case, 1973
          Count: -
           Order †Myriacanthiformes see Suborder Myriacanthoidei Patterson, 1965
          Count: -
           Order †Petalodontiformes Zangerl, 1981
          Count: -
           Order †Psammodontiformes Obruchev, 1953
          Count: -