The 100-million-year-old fossil has been identified as a proto-snake with two legs by two experts in the field, even though the analysis hadn't began yet.
According to Michael Lee of the University of Sydney and Michael Caldwell of Chicago's Field Museum, the 100-million-year-old fossil, christened Pachyrachis problematicus (problematic thick-ribbed animal) in the late 1970s, is a proto-snake with two legs.