[Phylum] Chordata Bateson, 1885 - chordates Subphylum Craniata auct. Infraphylum Vertebrata Lamarck, 1801 - vertebrates Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates Class †Placodermi McCoy, 1848 †Arthrodira Woodward, 1891 Order †Actinolepidiformes Family †Gavinaspididae Dupret & Zhu, 2008 1 Genus †Gavinaspis Dupret & Zhu, 2008