M is for Macrotarsius

Macrotarsius is a fossil primate closely related to and similar in appearance to modern tarsiers.

Philippine Tarsier (Carlito syrichta), one of the smallest primates. This one is about 5 inches long with a tail longer than its body. Photo taken in Bohol, Philippines. Credit: mtoz CC 2.0 By SA

Modern tarsiers are unique in the structure of their back foot, specifically the ankle bones (the tarsals), hence their common name of ‘tarsier.’