Eurypterid (2 of 2) (IMAGE) University of Leicester Caption This is a reconstruction of eurypterid (sea scorpion) chasing a condont (early vertebrate). The Soom Shale is one of only two deposits world-wide that preserves complete conodont animals including their muscles, eyes and notochord (stiffening rod). Conodonts are some of our earliest vertebrate ancestors. Credit Artist credit: Alan Male Usage Restrictions Use only with credit. 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.