Crustacean claw fossil (IMAGE) University of Texas at Austin Caption A fossil of a crustacean claw exoskeleton from the Posidonia Shale in Germany. Credit Drew Muscente Usage Restrictions Include photo 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.