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 Galeomorpha see Superorder Galeomorphii Compagno, 1973
             Suborder Lamnoidea see Order Lamniformes Berg, 1958
               Family Cetorhinidae Gill, 1861 - basking sharks