Close up of the Radula (IMAGE) University of Bristol Caption This is a close up of the radula preserved in Calvapilosa kroegeri next to a radula from a modern chiton. Credit Luke Parry and Peter Van Roy 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.