Excavating Mandible (image) American Museum of Natural History Share Print E-Mail Caption Members of the international expedition team are collecting a Gryposuchus pachakamue mandible along the banks of the Amazon River. The lead author of the study, Rodolfo-Salas Gismondi, is on the right. Credit © Dario De Franceschi Usage Restrictions Can be used with appropriate credit Share Print E-Mail 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.