Monkeys hiding on a plateau in the Amazon turn out to be new species

A group of fluffy grey monkeys living in the Amazon rainforest belong to a new species. The monkeys were first spotted by biologists a century ago but have only now been recognised as a distinct group.

Plecturocebus parecis lives on the Parecis Plateau in Rondônia state, Brazil. The surrounding rainforest is being cut down, but so far the monkeys have survived because the Plateau’s steep sides make it hard to access.

They were first noted by scientists in 1914 but were thought to be ashy titis (P. cinerascens …

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