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 Grade †Placodermiomorphi [monotypic] Class †Placodermi McCoy, 1848 [paraphyletic?] Order †Rhenaniformes [monotypic] see Order Rhenanida Broili, 1930 Family †Asterosteidae Woodward, 1891