[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 Galeomorphi Compagno, 1973
Family †Ptychodontidae Jaekel, 1898, incertae sedis
1 Genus †Ptychodus Agassiz, 1837
2 Genus †Hylaeobatis Woodward, 1916