[Phylum] Chordata Bateson, 1885 - chordates Subphylum Craniata auct. Infraphylum Vertebrata Lamarck, 1801 - vertebrates Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates Class †Placodermi McCoy, 1848 Order †Rhenanida Broili, 1930 [monotypic] Family †Asterosteidae Woodward, 1891 Genus †Gemuendina Traquair, 1903