Fossil Skeleton (IMAGE) Yale University Caption A new analysis of this 62-million-year-old partial skeleton of Torrejonia, a small mammal from an extinct group of primates called plesiadapiforms, had skeletal features adapted for living in trees. Credit ©2017 Stephen Chester. Published by the Royal Society under the terms of the Creative Commons Attribution License, which permits unrestricted use, provided the original author and source are credited. 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.