Order †Ornithischia Seeley, 1887
Count: -
   Suborder †Ankylosauria Osborn, 1923 see Infraorder Ankylosauria Osborn, 1923
  Count: [*] †3f12g
     1 Family †Scelidosauridae Huxley, 1869
    Count: -
     2 Family †Nodosauridae Marsh, 1890
    Count: -
     3 Family †Ankylosauridae Brown, 1908
    Count: -