Superphylum Deuterostomia Grobben, 1908 - deuterostomes see Infrakingdom Deuterostomia Grobben, 1908
   Phylum Chordata Bateson, 1885 - chordates
     Subphylum Craniata auct. see Subphylum Vertebrata Cuvier, 1812
       Vertebrata (Lamarck, 1801) - vertebrates see Subphylum Vertebrata Cuvier, 1812
         Myopterygii - myopterygians
           Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates
             Grade Chondrichthiomorphi
               Class Chondrichthyes Huxley, 1880 - cartilaginous fishes
                 Subclass Elasmobranchii Bonaparte, 1838 - shark-like fishes
                   Infraclass Euselachii Hay, 1902 - sharks and rays, and related fossils
                     [plesion] Order †Ctenacanthiformes Glikman, 1964
                       1 Genus †Acronemus Rieppel, 1982, incertae sedis
                       2 Genus †Carinacanthus Bryant, 1934, incertae sedis
                       3 Family †Ctenacanthidae Dean, 1909
                       4 Family †Bandringidae Zangerl, 1969
                       5 Family †Phoebodontidae Williams, 1981