Infraphylum Tetrapoda Goodrich, 1930 see Clade Tetrapoda Hatschek & Cori 1896 [Laurin 2020]
   Superclass Amniota Haeckel, 1866 see Clade Amniota Haeckel 1866 [Laurin & Reisz 2020]
     Paraclass Reptilia Linnaeus, 1758 [paraphyletic] - reptiles
       Parasubclass Diapsida Osborn, 1903 [paraphyletic] - diapsids see Clade Diapsida Osborn 1903 [Gauthier & de Queiroz 2020]
         Parainfraclass Archosauria Cope, 1869 [paraphyletic] see Clade Archosauria Cope 1869 [Gauthier & Padian 2020]
           Superorder †Ornithischia Seeley, 1887 see Order Ornithischia Seeley, 1887
             1 Paraorder †Lesothosauria Olshevsky, 1991 [paraphyletic]
             2 Paraorder †Ankylosauria Osborn, 1923 [paraphyletic] see Infraorder Ankylosauria Osborn, 1923
             3 Order †Stegosauria Marsh, 1877 see Infraorder Stegosauria Marsh, 1877
             4 Paraorder †Pachycephalosauria Maryañska & Osmólska, 1974 [paraphyletic] see Infraorder Pachycephalosauria Maryañska & Osmólska, 1974
             5 Order †Ceratopsia Marsh, 1890 see Infraorder Ceratopsia Marsh, 1890
             6 Order †Ornithopoda Marsh, 1881 see Infraorder Ornithopoda Marsh, 1881
             7 Genus †Rhadinosaurus Seeley, 1881, nom. dub., incertae sedis
             8 Genus †Thecospondylus Seeley, 1882, nom. dub., incertae sedis
             9 Genus †Tichosteus Cope, 1878, nom. dub., incertae sedis