Digging mammal reconstruction (IMAGE) American Museum of Natural History Caption This portrait shows the tritylodontid Fossiomanus sinensis (upper right) and the eutriconodontan Jueconodon cheni in burrows; both lived the Early Cretaceous Jehol Biota (about 120 million years ago), northeastern China, and showed convergent skeletal features adapted to fossorial lifestyle. Credit © Chuang Zhao Usage Restrictions Can be used with appropriate credit 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.