<i>Cercopithecus erythrotis</i> (IMAGE)
Caption
Guenon monkeys have undergone a remarkable evolution in facial appearance as a way of avoiding interbreeding with closely related and geographically proximate species, researchers from NYU and the University of Exeter have found. Shown here is one species of guenon: Cercopithecus erythrotis.
Credit
Image courtesy of William Allen and <i>Nature Communications</i>.
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