Fig. 2From: Apes and Tricksters: The Evolution and Diversification of Humans’ Closest RelativesFossil skull of Proconsul heseloni (KNM-RU 7290) from Rusnga Island, Kenya. This specimen was found in 1948 during an expedition led by Louis and Mary Leakey and provided some of the first evidence of the cranial features present in the earliest fossil apes. Years of subsequent fieldwork have recovered many partial skeletons of Proconsul so that now, nearly the entire skeleton is represented in collections. Photo courtesy of Eric DelsonBack to article page