Class Reptilia Linnaeus, 1758 - reptiles Subclass Archosauria Cope, 1869 see Division Archosauria Cope, 1869 Order †Ornithischia Seeley, 1887 Suborder †Ceratopsia Marsh, 1890 see Infraorder Ceratopsia Marsh, 1890 Family †Caenagnathidae Sternberg, 1940