Order †Ornithischia Seeley, 1887
   Suborder †Ornithopoda Marsh, 1871 see Infraorder Ornithopoda Marsh, 1881
     Family †Iguanodontidae Cope, 1869
       Genus †Callovosaurus Galton, 1980
       Genus †Camptosaurus Marsh, 1885
       Genus †Iguanodon Mantell, 1825
       Genus †Muttaburrasaurus Bartholomai & Molnar, 1981
       Genus †Ouranosaurus Taquet, 1976
       Genus †Probactrosaurus Rozhdestvenskii, 1966
       Genus †Vectisaurus Hulke, 1879, nom. dub.