A New Ichnospecies (IMAGE) Waseda University Caption Recent study identifies a new species of extinct bivalves that seem to have lived in a unique habitat: the shell of an ancient, now extinct, leatherback sea turtle while the turtle was alive, which allowed this species to colonize new environments and facilitated the evolution of new species. Credit Waseda University 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.