Homo erectus (KNM-ER 3733)

An almost complete cranium from Koobi Fora on the eastern side of Lake Turkana, Kenya (1.6 my BP); see [Boyd & Silk 1997] , pp 428-435.

One or two palaeo-anthropologists believe this specimen is distinct enough from later erectines to warrant a separate species [Wood 1992] . They refer to it as Homo ergaster.

Most others include it within Homo erectus.