<em>Lystrosaurus</em> Specimen (IMAGE) California Academy of Sciences Caption The ancient mammal Lystrosaurus was a survivor of the Permian-Triassic Mass Extinction. The specimen shown is part of the Iziko: South African Museum collection (SAM-PK-K8524). Credit © Kenneth Angielczyk Usage Restrictions Images are available for editorial use only. Proper attribution must be displayed. 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.