Cephalaspis (IMAGE) University of Bristol Caption Life restoration of Cephalaspis, a typical osteostracan, swimming over the substrate. Credit Hugo Salais (Metazoa Studio) 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.