Fossil specimen of Stanleycaris hirpex (IMAGE) Royal Ontario Museum Caption Fossil specimen of Stanleycaris hirpex. Dark material inside the head is the remains of nervous tissue, specimen ROMIP 65674.2. Credit Photo by Jean-Bernard Caron © Royal Ontario Museum Usage Restrictions For use with this story only. 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.