期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：1991
卷号：88
期号：6
页码：2137-2140
DOI：10.1073/pnas.88.6.2137
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：A previously unidentified middle Miocene primate from the La Venta deposits of Colombia is intermediate between squirrel monkeys (Saimiri) and callitrichines (marmosets and tamarins) in the morphology of the lower molars, mandible, and talus. Laventiana annectens is closely related to Saimiri and to Cebus (capuchin monkeys) yet resembles the probable callitrichine morphotype, demonstrating that archaic relatives of a Saimiri-like stock were suitable structural ancestors for the enigmatic callitrichines. Laventiana is also more primitive than Saimiri (= Neosaimiri) fieldsi from the same fauna, further increasing the likelihood that the latter is a lineal ancestor of modern squirrel monkeys.
