Data from: An Early Oligocene age for the oldest known monkeys and rodents of South America
Erik Seiffert
The Santa Rosa fossil locality in eastern Perú produced the first Paleogene vertebrate fauna from the Amazon Basin, including the oldest known monkeys from South America. This diverse paleofauna was originally assigned an Eocene age, based largely on the stage of evolution of the site’s caviomorph rodents and marsupials. Here we present new detrital zircon dates that indicate that the maximum composite age of Santa Rosa is 29.6±0.8 Ma (Lower Oligocene), although several zircons from...
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