[Phylum] Chordata Bateson, 1885 - chordates Subphylum Craniata auct. Infraphylum Vertebrata Lamarck, 1801 - vertebrates Superclass †Osteostracomorphi Class †Osteostraci Lankester, 1868 Order †Thyestiformes Family †Kiaeraspididae Stensiö, 1932, nom. praeval. Genus †Nectaspis Wängsjö, 1952