Oreopithecus bambolii lived in what is now Italy between 8.3 and 6.7 million years ago.
, researchers led by Ashley Hammond, from American Museum of Natural History, have now examined the skeleton ofand compared it with other fossils to get a better idea of how this peculiar ape would have moved. They also examine evolutionary scenarios in which its physical traits could have emerged.
Their findings showed its lower torso is unlike any known hominoids. It did not have any of the features needed for it to walk upright on two legs. It also lacked the pelvic and torso stiffness seen in modern apes that allows them to climb trees. The team say's lower torso has some similarities with a siamang—a black-furred gibbon found in southeast Asia.evolved from an unknown ancestor on an island with limited resources and a lack of land-based predators.
An Oreopithecus bambolii skeleton. The unusual, extinct species does not appear to be closely related to any living species of ape.Previous research suggested that because it had no predators, it may have shifted away from climbing—a risky behavior—in favor of lower energy, land-based activities such as foraging. It is thought the species went extinct after a land bridge emerged, connecting its island home to the mainland and large predators.
could have developed its hominin-like pelvis through convergent evolution. They say there is a trend towards walking upright within fossil hominoids, and natural selection for this trait could explain the species' features. "Future work incorporating other regions of the skeleton might clarify which of these scenarios is the most credible," they conclude."All of these scenarios reaffirm late Miocene
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