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
[stem] Order †Protacrodontiformes [monotypic]
1 Family †Protacrodontidae Zangerl, 1981