[Phylum] Chordata Bateson, 1885 - chordates Subphylum Craniata auct. Infraphylum Vertebrata Lamarck, 1801 - vertebrates Superclass †Osteostracomorphi Class †Osteostraci Lankester, 1868 Order †Benneviaspidiformes Afanassieva, 1991 Family †Boreaspididae Berg, 1955, nom. praeval. Genus †Hoelaspis Stensiö, 1927