Proconsul

…to the modern apes are Proconsul, Afropithecus, Dryopithecus, and Sivapithecus, the latter being a possible ancestor of the orangutan.

The genus Proconsul is known from a nearly complete skeleton and several other postcranial bones, a large number of jaw and facial fragments, and several partial skulls—only one of them complete, and it had been distorted by pressure of the surrounding rocks during fossilization. Subsequent reconstruction reveals…