Proconsul Africanus.The first species of the oligocene-era (about 34 to 23 million years ago) fossil genus of primate to be discovered and was named by Arthur Hopwood, an associate of Louis Leakey, in 1933. Proconsul Africanus has teeth like an ape but a rather human shaped forehead. It walked on all fours. The average body mass of this species is estimated to have been 18 kg.
