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 [stem] Order †Antarctilamniformes Ginter et al., 2008 Family †Antarctilamnidae Ginter, Liao & Valenzuela-Ríos, 2008