Order †Ornithischia Seeley, 1887
Parvorder †Genasauria Sereno, 1986
see Clade Genasauria Sereno 1986
Nanorder †Thyreophora Nopcsa, 1915
see Suborder Thyreophora Nopcsa, 1915
Hypoorder †Thyreophoroidea Nopcsa, 1928
see [unranked] Thyreophoroidea Nopcsa, 1928
Minorder †Eurypoda Sereno, 1986
see Clade Eurypoda Sereno 1986
Suborder †Stegosauria Marsh, 1877
see Infraorder Stegosauria Marsh, 1877
Family †Stegosauridae Marsh, 1880
Genus †Lexovisaurus Hoffstetter, 1957, nom. dub.