The oldest ape and Old World monkey fossils have been unearthed in a riverbed in Tanzania, a new study reports.
Researchers found a tooth from the newfound species Nsungwepithecus gunnelli, the oldest member of the primate group that contains Old World monkeys (cercopithecoids). The team also found a jawbone from the newfound species Rukwapithecus fleaglei, an early member of the hominoids, the group containing the great apes (gorillas, chimpanzees, bonobos, orangutans and humans) and lesser apes (gibbons).
The fossil remnants of these two primate species date back to 25 million years ago, filling a gap in the fossil record that reveals when apes and monkeys first diverged.
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