Superphylum Deuterostomia Grobben, 1908 - deuterostomes see Infrakingdom Deuterostomia Grobben, 1908
   Phylum Chordata Bateson, 1885 - chordates
     Subphylum Craniata auct.
       Infraphylum Vertebrata Lamarck, 1801 - vertebrates
         Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates
           Eugnathostomata
             Grade Chondrichthyomorphi [monotypic]
               Class Chondrichthyes Huxley, 1880 - cartilaginous fishes
                 Subclass Euselachii Hay, 1902 - sharks, rays, and related fossils
                   Infraclass Elasmobranchii Bonaparte, 1838
                     Division Selachii - sharks
                       Superorder Squalomorphi
                         Series Squalida [monotypic]
                           Order Squaliformes Compagno, 1973 - dogfish sharks
                             1 Family Centrophoridae Bleeker, 1859 - gulper sharks
                             2 Family Etmopteridae Fowler, 1934 - lantern sharks
                             3 Family Somniosidae Jordan, 1888 - sleeper sharks
                             4 Family Oxynotidae Gill, 1863 - rough sharks
                             5 Family Dalatiidae Gray, 1851 - kitefin sharks
                             6 Family Squalidae Blainville, 1816 - dogfish sharks