Kingdom [Animalia] Linnaeus, 1758 - animals
   Phylum Chordata Bateson, 1885 - chordates
     Subphylum Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
       Class Reptilia Linnaeus, 1758 - reptiles
         Subclass Archosauria Cope, 1869 see Division Archosauria Cope, 1869
           Order †Ornithischia Seeley, 1887
             1 Suborder †Ornithopoda Marsh, 1871 see Infraorder Ornithopoda Marsh, 1881
             2 Suborder †Stegosauria Marsh, 1877 see Infraorder Stegosauria Marsh, 1877
             3 Suborder †Ankylosauria Osborn, 1923 see Infraorder Ankylosauria Osborn, 1923
             4 Suborder †Ceratopsia Marsh, 1890 see Infraorder Ceratopsia Marsh, 1890