Abstract
The Napak specimens, a molar tooth and a frontal bone, from early Miocene deposits, are the earliest known well preserved fossil cercopithecoids. The discoveries suggest that the subdivision of the Cercopithecoidea into two subfamilies, the Colobinae and the Cercopithecinae, took place at least 19 million years ago.
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PILBEAM, D., WALKER, A. Fossil Monkeys from the Miocene of Napak, North-East Uganda. Nature 220, 657–660 (1968). https://doi.org/10.1038/220657a0
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DOI: https://doi.org/10.1038/220657a0
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