Fossil Trilobite (image) University of Bristol Share Print E-Mail Caption A fossil trilobite from the Cambrian Sirius Passet fossil Lagerstätte of North Greenland. Trilobites are one of the earliest groups of animals to appear in the fossil record. Credit Jakob Vinther, University of Bristol. Usage Restrictions Single use only. To be used with press release. Please do not archive. Share Print E-Mail 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.