Kingdom [Animalia] Linnaeus, 1758 - animals
   Subkingdom Metazoa Haeckel, 1874 see Kingdom Animalia Linnaeus, 1758
     Division Eumetazoa Butschli, 1910 see Subkingdom Eumetazoa Butschli, 1910
       Subdivision Bilateralia
         Phylum Chordata Bateson, 1885 - chordates
           Subphylum Vertebrata Cuvier, 1812 - vertebrates
             Class Reptilia Linnaeus, 1758 - reptiles
               Subclass †Euryapsida Colbert, 1945 see Subclass Diapsida Osborn, 1903
                 Order †Placodontia Owen, 1859
                   1 Family †Helveticosauridae Peyer, 1955
                   2 Family †Placodontidae Cope, 1871
                   3 Family †Cyamodontidae Nopcsa, 1923
                   4 Family †Henodontidae Huene, 1936