Hallucigenia sparsa (1 of 2) (image) University of Cambridge Share Print E-Mail Caption This is Hallucigenia sparsa from the Burgess Shale (Royal Ontario Museum 61513). The fossil is 15 mm long. Credit Jean-Bernard Caron Usage Restrictions Please credit to Jean-Bernard Caron 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.