246 MYO Bipedal Dinosaur (image) American Museum of Natural History Share Print E-Mail Caption The 246 million year old footprints of Sphingopus isp. from the Early Anisian of Baranów, Poland are associated with a trackway that is even more dinosaur-like in that the gait was bipedal.These tracks are the oldest record of a large-bodied (track length 15 cm) and bipedal member of the dinosaur lineage. Credit Grzegorz Niedźwiedzki Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.