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The earliest primates.

L Van Valen·R E Sloan
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Abstract

The known range of the Primates is extended down from the middle Paleocene to the early Paleocene and late Cretaceous by a new genus and two new species from Montana, Purgatorius unio and P. ceratops. These species approach condylarths and leptictid and erinaceoid insectivores in structure. Purgatorius is referred to a new subfamily, Purgatoriinae, of the Paromomyidae, but is probably not the stem primate. The fauna of Purgatory Hill indicates a late early Paleocene age.

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L Van Valen, R E Sloan. 1965-11-05. The earliest primates.. https://doi.org/10.1126/science.150.3697.743

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