Fossil Sea Urchin (IMAGE) University of Southern California Caption Eotiaris guadalupensis fossil was discovered by USC's Jeffrey Thompson in the Smithsonian collections. Credit Courtesy of David Bottjer/USC Usage Restrictions For use in news articles only 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.