Anomalodonta and vanuxemia (IMAGE) University of Chicago Caption Micro-CT scans of 460-million-year-old bivalves Anomalodonta (left) and Vanuxemia (right), early members of the lineage that gave rise to scallops, mussels, oysters, cockles, quahogs, and many other species. Credit Images courtesy Stewart Edie Usage Restrictions With credit License Original 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.