Skeleton (IMAGE) Smithsonian Caption The skeleton of the South African reptile, Eunotosaurus africanus, fills a gap in the early evolution of turtles and their enigmatic shell. Credit Tyler Lyson Usage Restrictions None License Licensed content 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.