Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
   Gnathostomata
     Teleostomi Bonaparte, 1836
       Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988], nom. cl. inval. see Clade Tetrapoda Hatschek & Cori 1896 [Laurin 2020]
         Amniota Haeckel, 1866 [Gauthier, Kluge & Rowe 1988], nom. cl. inval. - amniotes see Clade Amniota Haeckel 1866 [Laurin & Reisz 2020]
           Class Reptilia Linnaeus, 1758 [paraphyletic] - reptiles
             Subclass Diapsida Osborn, 1903 - diapsids see Clade Diapsida Osborn 1903 [Gauthier & de Queiroz 2020]
               Order †Placodontia Owen, 1859, incertae sedis
                 Family †Cyamodontidae Nopcsa, 1923
                   1 Genus †Cyamodus Meyer, 1863
                   2 Genus †Placochelys Jaekel, 1902
                   3 Genus †Psephoderma Meyer, 1858
                   4 Genus †Psephosaurus Fraas, 1896
                   5 Genus †Saurosphargis Frech, 1903, nom. dub.