Reconstruction (IMAGE) Proceedings of the National Academy of Sciences Caption Reconstruction of the euthycarcinoid Heterocrania rhyniensis from the Devonian Period in Scotland. Credit Image credit: Gregory D. Edgecombe Usage Restrictions None License Licensed 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.