In a new paper published in Science, an international team of researchers have described one such fascinating fossil, a set of monkey teeth from Peru. The presence of living South-Central American monkeys suggests it must have happened at least once. Monkey teeth are often studied to reconstruct relationships because they preserve well and differ between species. The final tooth M (in blue) is from a living South-Central American monkey (all the others we have shown are from extinct ones). Comparing it to K and L shows the similarity between this living South American monkey and the two extinct ones.

Source: The North Africa Journal April 09, 2020 18:00 UTC