<i>Filikomys primaevus</i> Fossils (IMAGE) University of Washington Caption A block of Filikomys primaevus fossils analyzed from the Egg Mountain Formation in western Montana. This particular block includes skulls and skeletons of two adult and one subadult individuals. Credit Luke Weaver Usage Restrictions Must include 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.