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 Squatinida
                           1 Order †Protospinaciformes [monotypic]
                           2 Order Echinorhiniformes [monotypic] - bramble sharks
                           3.1 Order Squatiniformes Buen, 1926 [monotypic] - angel sharks
                           3.2 Order Pristiophoriformes Compagno, 1973 [monotypic] - saw sharks