Collaborative Research: Paleontological Investigations to Recover Fossil Monkeys from the Cenozoic of South America

新世界猴的祖先在新生代早期的某个时候到达了南美洲，但是由于化石记录的不充分，只有间接的证据表明它们是何时或从哪里来的——直接从非洲来的可能性很大。它们在南美洲的第一个记录出现在玻利维亚的萨拉，可以追溯到大约2500万年前。这个合作的野外项目的目标是在Salla和玻利维亚的其他地方收集更多最早的南美灵长类动物的材料，并准确地确定它们的年代，并探索阿根廷相似年龄和更早的地层，在那里很可能找到祖先的形式。这个项目将阐明这些与我们在非洲的祖先平行进化的灵长类动物的起源。＊＊＊

9414474 MacFadden Forbears of New World Monkeys reached South America some time in the early Cenozoic, but because of an inadequate fossil record there are only indirect lines of evidence about when or from where - direct from Africa remains a distinct possibility. The first record of them in South America occurs at Salla, Bolivia, and dates to about 25 million years ago. The goal of this collaborative field project is to collect and date accurately more material of the earliest South American primates at Salla and possibly elsewhere in Bolivia and to explore Argentina strata of similar age, and earlier, where it is very likely ancestral forms should be found. This project will shed much needed light on the origins of these primates who evolved in parallel with our own ancestors in Africa. ***