ZZF_Iotuba ELI-S_001-complete (1).jpg (IMAGE) Durham University Caption Complete specimen of the Cambrian cage worm Iotuba from the Chengjiang fossil deposit. Credit Credit: Zhang Zhifei Usage Restrictions Please credit as stated. 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.