<I>Turritella postmortoni</I> (IMAGE) Syracuse University Caption The large, iconic gastropod Turritella postmortoni from Alabama, one such mollusk that went extinct at the PETM. Credit Provided 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.