Anomalocaris canadensis head (IMAGE) American Museum of Natural History Caption A close-up on the head of a complete specimen of Anomalocaris canadensis from the Cambrian Burgess Shale of Canada, showing the maximum frontal appendage flexure. Credit © Alison Daley Usage Restrictions Can be used with appropriate credit 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.