A Fossil Heterostracan, Errivaspis waynensis (image) University of Manchester Share Print E-Mail Caption A fossil heterostracan, Errivaspis waynensis, from the early Devonian (approximately 419 million years ago) of Herefordshire, UK. Credit Image from Keating et al. 2018 Usage Restrictions None 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.