Order †Ornithischia Seeley, 1887
Parvorder †Genasauria Sereno, 1986
see Clade Genasauria Sereno 1986
Nanorder †Cerapoda Sereno, 1986
see Suborder Cerapoda Sereno, 1986
Hypoorder †Marginocephalia Sereno, 1986
see Clade Marginocephalia Sereno 1986
Suborder †Ceratopsia Marsh, 1890
see Infraorder Ceratopsia Marsh, 1890
Infraorder †Neoceratopsia Sereno, 1986
see Clade Neoceratopsia Sereno 1986
1 Genus †Leptoceratops Brown, 1914
2 Microorder †Coronosauria Sereno, 1986
see Clade Neoceratopsia Sereno 1986