Rosenberger A L, Setoguchi T, Hartwig W C
Department of Zoological Research, Smithsonian Institution, Washington, DC 20008.
Proc Natl Acad Sci U S A. 1991 Mar 15;88(6):2137-40. doi: 10.1073/pnas.88.6.2137.
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.
一种来自哥伦比亚拉文塔矿床的此前未被鉴定的中新世中期灵长类动物，在下臼齿、下颌骨和距骨的形态上介于松鼠猴（松鼠属）和狨猴（狨猴和绢毛猴）之间。连接拉文塔猴与松鼠猴以及僧面猴（卷尾猴）关系密切，但类似可能的狨猴形态类型，这表明类似松鼠猴种群的古老亲属是神秘狨猴合适的结构祖先。拉文塔猴也比同一动物群中的松鼠猴（=新松鼠猴）菲尔兹松鼠猴更原始，这进一步增加了后者是现代松鼠猴直系祖先的可能性。
