Class [Reptilia] Linnaeus, 1758 - reptiles Subclass †Araeoscelomorpha Kuhn, 1968 Order †Araeoscelidia Williston, 1913 1 Family †Araeoscelidae Williston, 1910 see Family Araeoscelididae 2 Family †Petrolacosauridae Peabody, 1952