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 †Protoceratopsidae Granger & Gregory, 1923