亚辟猴（Apidium），又名牛骨猴，是生存于3600-3200万年前渐新世早期的灵长目。亚辟猴的化石在埃及的法尤姆很普遍，其下最早的A. moustafai的化石较罕有，而较迟的A. phiomense则较多。亚辟猴的学名意思是「小牛」，因为最初发现时以为牠是一种牛的化石。

亚辟猴分类在狭鼻小目下副猿科中，最接近现今的旧世界猴，但外表却像猿。

亚辟猴适应生活在北非的热带森林中。牠的前肢可以在树枝上走动及在树间跳跃。雄性亚辟猴比雌性的大很多，且有较大的犬齿。牠的后肢能抓住树枝，确保不会从树上掉下来。

The genus Apidium (from Latin, a diminutive of the Egyptian bull god, Apis, as the first fossils were thought to be from a type of a cow) is that of at least three extinct primates living from the late Eocene to the early Oligocene, roughly 36 to 32 million years ago. Apidium fossils are common in the Fayoum deposits of Egypt. Fossils of the earlier species, Apidium moustafai, are rare; fossils of the later species Apidium phiomense are fairly common.