vertebrates Lamarck, 1801 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
Status: extant
   †Pteraspidimorphi [paraphyletic]
  Status: fossil
     †Heterostraci Lankester, 1868, sedis mutabilis - heterostracans
    Status: fossil
       Family †Cyathaspididae Kiaer, 1932, nom. praeval. [paraphyletic]
      Status: fossil
         †Problematic Heterostraci [paraphyletic]
        Status: fossil
           Family †Amphiaspididae Obruchev, 1939
          Status: fossil
             Genus †Gabreyaspis Novitskaya, 1968
            Status: fossil