Fossils from the Fezouata Shale (IMAGE) University of Exeter Caption Fossils from the Fezouata Shale. From left to right, a non-mineralized arthropod (Marrellomorpha), a palaeoscolecid worm and a trilobites Credit Emmanuel Martin Usage Restrictions This image may only be used with reports of this research 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.