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 and Ethiopia, representing over 20 individuals. It is accepted that A. anamensis is ancestral to A. afarensis and continued an evolving lineage. Fossil evidence determines that the Australopithecus anamensis is the earliest hominin species in the Turkana Basin. 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.