Erik Seiffert (IMAGE) Keck School of Medicine of USC Caption Erik Seiffert identifying a small fossil from the Santa Rosa site where Ucayalipithecus was found, in Amazonian Perú Credit Dorien de Vries 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.