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 Archosauria Cope, 1869 see Division Archosauria Cope, 1869
                 Order †Ornithischia Seeley, 1887
                   Suborder †Ceratopsia Marsh, 1890 see Infraorder Ceratopsia Marsh, 1890
                     Family †Ceratopsidae Marsh, 1888
                       Genus †Triceratops Marsh, 1889
                         †Triceratops prorsus Marsh, 1889