Elrathia kingii (IMAGE) American Museum of Natural History Caption Elrathia kingii, one of the most common and well-recognized trilobites, which was collected in western Utah. Credit M. Hopkins/© AMNH Usage Restrictions Can be used with appropriate credit 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.