Vertebrata Cuvier, 1812 - vertebrates
   Gnathostomata
     Class Chondrichthyes Huxley, 1880 - cartilaginous fishes
       Subclass Elasmobranchii Bonaparte, 1838 - shark-like fishes
         Superorder Euselachii Hay, 1902 see Infraclass Euselachii Hay, 1902
           Order †Ctenacanthiformes Glikman, 1964
             Superfamily †Ctenacanthoidea Dean, 1909
               1 Family †Ctenacanthidae Dean, 1909
               2 Family †Bandringidae Zangerl, 1969
               3 Family †Phoebodontidae Williams, 1981