Class Reptilia Linnaeus, 1758 - reptiles Subclass Archosauria Cope, 1869 see Division Archosauria Cope, 1869 Order †Thecodontia Owen, 1859 see Division Archosauria Cope, 1869 Suborder †Aetosauria Nicholson & Lydekker, 1889 see Order Aetosauria Nicholson & Lydekker, 1889