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
         Superorder Euselachii Hay, 1902 see Subclass Euselachii Hay, 1902
           Order Squalomorpha see Superorder Squalomorphii (Compagno, 1973)
             Suborder Squaloidea see Order Squaliformes Compagno, 1973
               Family Squalidae Blainville, 1816 - dogfish sharks