[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 Squalomorphi
                 Order Squaliformes Compagno, 1973 - dogfish sharks
                   1 Family †Eoscymnidae Herman & van den Eeckhaut, 2010
                   2 Family Centrophoridae Bleeker, 1859 - gulper sharks
                   3 Family Etmopteridae Fowler, 1934 - lantern sharks
                   4 Family Somniosidae Jordan, 1888 - sleeper sharks
                   5 Family Oxynotidae Gill, 1863 - rough sharks
                   6 Family Dalatiidae Gray, 1851 - kitefin sharks
                   7 Family Squalidae Blainville, 1816 - dogfish sharks