The document classifies different types of primate locomotion including vertical clingers and leapers like tarsiers and galagos that have a low intermembral index; slow climbers like pottos and lorises that climb slowly with their nose to the branch; arboreal quadrupeds/branch runners like lemurs, New World monkeys, and Old World monkeys that run and climb on branches; semi-terrestrial quadrupeds/ground runners like patas monkeys, baboons, and macaques that are digitigrade or palmigrade; brachiators like gibbons, siamangs, and spider monkeys that have a high intermembral index; and knucklewalkers and fist
