Order †Ornithischia Seeley, 1887
   Suborder †Ankylosauria Osborn, 1923 see Infraorder Ankylosauria Osborn, 1923
     Family †Nodosauridae Marsh, 1890
       Genus †Hylaeosaurus Mantell, 1832
       Genus †Nodosaurus Marsh, 1889
       Genus †Panoplosaurus Lambe, 1919
       Genus †Polacanthus Hulke, 1882
       Genus †Sauropelta Ostrom, 1970
       Genus †Silvisaurus Eaton, 1960
       Genus †Struthiosaurus Bunzel, 1871