Australopithecus anamensis

Australopithecus anamensis (or Praeanthropus anamensis) is a stem-human species that lived approximately four million years ago. Nearly one hundred fossil specimens are known from Kenya^[2] and Ethiopia,^[3] representing over 20 individuals. It is accepted that A. anamensis is ancestral to A. afarensis and continued an evolving lineage.^[4] Fossil evidence determines that the Australopithecus anamensis is the earliest hominin species in the Turkana Basin.^[5] Due to an inability to retrieve a massive collection of fossils researchers are not able to make enough observations to differentiate a lot of the early hominids.^[6]

• http://en.wikipedia.org/wiki/Australopithecus anamensis
• Leakey, M. et al., 2002, New four-million-year-old hominid species from Kanapoi and Allia Bay, Kenya: Nature, v. 376, p. 565-571.