Elwyn L. Simons was one of the leading figures of paleoprimatology, and founder of the Duke University Primate Center. His fossil discoveries included Aegyptopithecus. He worked on primate conservation, focusing on the lemurs of Madagascar. He helped to establish Park Ivoloina to promote lemur habitat conservation, and ensured that one of the missions of the Duke University Primate Center was captive breeding of endangered lemur species. The NYT has an extended obituary, with comments from several fellow anthropologists.