vertebrates Lamarck, 1801 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
   †Pteraspidimorphi [paraphyletic]
     †Heterostraci Lankester, 1868, sedis mutabilis - heterostracans
       Family †Cyathaspididae Kiaer, 1932, nom. praeval. [paraphyletic]
         †Problematic Heterostraci [paraphyletic]
           Family †Amphiaspididae Obruchev, 1939
             1 Genus †Putoranaspis Obruchev, 1964, sedis mutabilis
             2 Genus †Hibernaspis Obruchev, 1939, sedis mutabilis
             3.1.1 Genus †Tareyaspis Novitskaya, 1968
             3.1.2 Genus †Pelaspis Novitskaya, 1971
             3.2.1.1 Genus †Olbiaspis Obruchev, 1964
             3.2.1.2 Genus †Dotaspis Novitskaya & German, 1983
             3.2.2.1 Genus †Siberiaspis Obruchev, 1964
             3.2.2.2 Genus †Angaraspis Obruchev, 1964
             3.3.1 Genus †Gabreyaspis Novitskaya, 1968
             3.3.2.1 Genus †Prosarctaspis Novitskaya, 1968, sedis mutabilis
             3.3.2.2 Genus †Kureykaspis Novitskaya, 1968, sedis mutabilis
             3.3.2.3 Genus †Gerronaspis Novitskaya, 1971, sedis mutabilis
             3.3.2.4 Genus †Edaphaspis Novitskaya, 1968, sedis mutabilis
             3.3.2.5.1 Genus †Argyriaspis Novitskaya, 1971
             3.3.2.5.2.1 Genus †Litotaspis Novitskaya, 1971, sedis mutabilis
             3.3.2.5.2.2 Genus †Aphataspis Obruchev, 1964, sedis mutabilis
             3.3.2.5.2.3.1 Genus †Lecaniaspis Novitskaya, 1971
             3.3.2.5.2.3.2 Genus †Eglonaspis Obruchev, 1959
             3.3.2.5.2.4.1 Genus †Tuxeraspsis Randle, 2017, nom. ined., orth. inval. see Genus Tuxeraspis Novitskaya, 1971
             3.3.2.5.2.4.2.1 Genus †Pelurgaspis Obruchev, 1964
             3.3.2.5.2.4.2.2 Genus †Empedaspis Novitskaya, 1971