Strange swamp-dwelling prehistoric ape that couldn't walk on two legs or climb trees poses evolutionary puzzle
, 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 with such success. The team say's lower torso has some similarities with a siamang—a black-furred gibbon found in southeast Asia.
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 had been suggested the species went extinct after a land bridge emerged, connecting its island home to the mainland and large predators.
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