Aistopoda

Aïstopoda (Greek for "[having] not-visible feet") is an order of highly specialised snake-like amphibians known from the Carboniferous and Early Permian of Europe and North America, ranging from tiny forms only 5 centimetres (2 in), to nearly 1 metre (3.3 ft) in length. The first appear in the fossil record in the Mississippian period and continue through to the Early Permian.