[Phylum] Chordata Bateson, 1885 - chordates
   Subphylum Craniata auct.
     Infraphylum Vertebrata Lamarck, 1801 - vertebrates
       Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates
         Class Chondrichthyes Huxley, 1880 - cartilaginous fishes
           Subclass Euselachii Hay, 1902 - sharks, rays, and related fossils
             Infraclass Elasmobranchii Bonaparte, 1838
               Superorder Galeomorphi Compagno, 1973
                 1 Family †Ptychodontidae Jaekel, 1898, incertae sedis
                 2 Order †Synechodontiformes Duffin & Ward, 1993
                 3 Order Heterodontiformes Compagno, 1973 [monotypic] - bullhead sharks
                 4 Order Orectolobiformes Compagno, 1973 - carpet sharks
                 5 Order Lamniformes Berg, 1958 - mackerel sharks
                 6 Order Carcharhiniformes Compagno, 1973 - ground sharks