vertebrates Lamarck, 1801 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
   †Pteraspidimorphi [paraphyletic]
     1 Genus †Arandaspis Ritchie & Gilbert-Tomlinson, 1977, sedis mutabilis
     2 Genus †Sacabambaspis Gagnier, Blieck & Rodrigo, 1986, sedis mutabilis
     3 Genus †Astraspis Walcott, 1892, sedis mutabilis
     4.1.1 Genus †Pharyngolepis Kiaer, 1911
     4.1.2.1 Genus †Cowielepis Blom, 2008
     4.1.2.2.1 Genus †Rhyncholepis Kiaer, 1911
     4.1.2.2.2.1 Genus †Pterygolepis Cossmann, 1920
     4.1.2.2.2.2 Genus †Birkenia Traquair, 1899
     4.2.1.1 Genus †Lasanius Traquair, 1899
     4.2.1.2.1 Genus †Euphanerops Woodward, 1900
     4.2.1.2.2 Genus †Jamoytius White, 1946
     4.2.2.1.1 Genus †Turinia Traquair, 1896
     4.2.2.1.2 Genus †Loganellia Fredholm, 1990
     4.2.2.2.1 Jawed vertebrates sedis mutabilis
     4.2.2.2.2 †Galeaspida sedis mutabilis - galeaspids
     4.2.2.2.3 †Osteostraci Lankester, 1868, sedis mutabilis
     5 †Heterostraci Lankester, 1868, sedis mutabilis - heterostracans