Rukwapithecus
Rukwapithecus fleaglei, the only species of the genus Rukwapithecus, is a fossil primate. Known from a single lower jaw preserving four teeth, it is interpreted as the earliest hominoid, a member of the group that includes gibbons, humans, and other apes. It is known from the Nsungwe Formation of south-western Tanzania, which dates to just over 25.2 million years ago. This area has also yielded the early Old [World monkey] Nsungwepithecus. Phylogenetic analysis places it within the group Nyanzapithecinae, related to Rangwapithecus and Nyanzapithecus.