Class Reptilia Linnaeus, 1758 - reptiles Subclass Archosauria Cope, 1869 see Division Archosauria Cope, 1869 Order †Ornithischia Seeley, 1887 Suborder †Ankylosauria Osborn, 1923 see Infraorder Ankylosauria Osborn, 1923 Family †Syrmosauridae Maleev, 1952 see Family Ankylosauridae Brown, 1908