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
             Order †Ceratopsia Marsh, 1890 see Infraorder Ceratopsia Marsh, 1890
               Family †Ceratopsidae Marsh, 1888
                 1 Parasubfamily †Eucentrosaurinae Olshevsky, 1991, nom. illeg. [paraphyletic] see Subfamily Centrosaurinae Lambe, 1915
                 2 Subfamily †Chasmosaurinae Lambe, 1915
                 3 Genus †Agathaumas Cope, 1872, nom. dub., incertae sedis
                 4 Genus †Arstanosaurus Shilin & Suslov, 1982, nom. dub., incertae sedis
                 5 Genus †Dysganus Cope, 1877, nom. dub., incertae sedis
                 6 Genus †Turanoceratops Nesov & Kaznyshkina, 1989, incertae sedis