Fleagle J G, Bown T M
Folia Primatol (Basel). 1983;41(3-4):240-66. doi: 10.1159/000156135.
New primate fossils have been recovered from the late Oligocene (Colhuehuapian) localities of Gaiman and Sacanana in Patagonian Argentina. The new fossils are provisionally allocated to Dolichocebus gaimanensis and Tremacebus harringtoni, the only primates previously described from these localities. These new dental remains are more primitive than the teeth of any previously known platyrrhines, living or fossil, and conform extremely well with the hypothetical ancestral morphotype for New World monkeys suggested by several authors. They are also very similar to the teeth of Oligocene catarrhines from Egypt such as Aegyptopithecus zeuxis.
在阿根廷巴塔哥尼亚地区盖曼和萨卡纳纳的渐新世晚期（科尔韦瓦皮阶）地层中发现了新的灵长类化石。这些新化石暂被归入盖曼长吻猴和哈氏恐猴，它们是此前在这些地点发现的仅有的灵长类动物。这些新的牙齿化石比此前已知的任何阔鼻猴类（包括现存的和化石类）的牙齿都更为原始，与多位作者提出的新世界猴假想祖先形态极为吻合。它们也与来自埃及的渐新世狭鼻猴类（如埃及猿）的牙齿非常相似。
