The most likely scenario for the arrival of platyrrhines to South America involves floating across the Atlantic Ocean on rafts made of naturally forming mats of vegetation.

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Platyrrhines, or New World monkeys, are believed to have arrived in South America from Africa during the Oligocene epoch, possibly by rafting across the Atlantic Ocean on mats of vegetation. This theory is supported by the vast distances of ocean that separate the continents, the lack of a continuous land bridge at the time, and the similarities between African and South American primate fossils from that era.

The Most Likely Scenario for the Arrival of Platyrrhines to South