[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 †Kujdanowiaspididae Berg, 1955, nom. praeval. Genus †Kujdanowiaspis Stensiö, 1942