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
         1 Genus †Scelidosaurus Owen, 1859
         2 Minorder †Eurypoda Sereno, 1986 see Clade Eurypoda Sereno 1986