Illustration Of Haramiyavia (IMAGE) University of Chicago Medical Center Caption This is an illustration of Haramiyavia, the earliest known proto-mammal (top). A 3-D reconstruction of the 210 million-year-old fossil jaw is superimposed (bottom). Credit April Neander 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.