Olduvai Hominid 9

Chellean man

OH 9 replica
Catalog no. OH 9
Common name Chellean man
Species Homo erectus
Age 1.4 million years
Place discovered Olduvai Gorge, Tanzania
Date discovered December 2 1960
Discovered by Louis S. B. Leakey

Olduvai Hominid number 9 (OH 9) is a fossilized skull cap of an early hominin, found in LLK II, Olduvai Gorge by Louis S. B. Leakey in 1960.[1] It is believed to be around 1.4 to 1.5 million years old and is the first hominid to have a brain size larger than 1,000 cubic centimetres (61 in3). Leakey named it "Chellean Man", in reference to the Oldowan tools found at the site, which were then referred to by the now-obsolete name Chellean. Heberer (1963) provisionally named a new species Homo leakeyi based on the specimen in honour of Leakey, but most subsequent workers have regarded it as H. ergaster, or as H. erectus where H. ergaster is considered a junior synonym.[2] Philip Tobias provisionally named a new subspecies, H. erectus olduvaiensis, in 1968 based on the specimen, but this has not seen continued use.[3] To the extent that proponents of the use of H. ergaster define ergaster as a separate lineage, equivalent to "African H. erectus", rather than a pure chronospecies, the assignment of OH 9 to H. erectus sensu stricto by Colin Groves supports subsuming H. ergaster into H. erectus.[4]

References

  1. ↑ Leakey, Mary (1971). Olduvai Gorge Vol 3: Excavations in Beds I and II, 1960-1963. London: Cambridge University Press.
  2. ↑ Heberer, G. (1963). "Über einen neuen archantropinen Typus aus der Oldoway-Schlucht". Z. Morph. Anthropol. (in German) (53): 171–177.
  3. ↑ Harrison, Terry (1993). "Cladistic Concepts and the Species Problem in Hominoid Evolution". In William Kimbel and Lawrence Martin. Species, Species Concepts, and Primate Evolution. New York: Plenum Press. pp. 360–365.
  4. ↑ Cela-Conde, Camilo; Ayala, Francisco (2007). Human Evolution: Trails from the Past. New York: Oxford University Press. p. 197.
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