Leptarctus Reconstruction 2 (IMAGE) American Museum of Natural History Caption A reconstruction of the head of Leptarctus primus attacking the Miocene rodent Cupidinimus. Credit © AMNH/N. Wong Usage Restrictions Can be used with appropriate 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.