Notharctus was an early primate that inhabited Europe and North America 50 million years ago. Modern lemurs evolved from primates similar to this genus. The body form of Notharctus is similar to that of modern lemurs. Unlike lemurs, however, Notharctus had a shorter face and forward-facing eyes surrounded by an enclosed circle of bone. Its fingers were elongated for clamping onto branches, including the development of a thumb. Its spine is flexible, like the living lemurs, and the animal was… (More on Notharctus)