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First fossil chimpanzee

Abstract

There are thousands of fossils of hominins, but no fossil chimpanzee has yet been reported. The chimpanzee (Pan) is the closest living relative to humans1. Chimpanzee populations today are confined to wooded West and central Africa, whereas most hominin fossil sites occur in the semi-arid East African Rift Valley. This situation has fuelled speculation regarding causes for the divergence of the human and chimpanzee lineages five to eight million years ago. Some investigators have invoked a shift from wooded to savannah vegetation in East Africa, driven by climate change, to explain the apparent separation between chimpanzee and human ancestral populations and the origin of the unique hominin locomotor adaptation, bipedalism2,3,4,5. The Rift Valley itself functions as an obstacle to chimpanzee occupation in some scenarios6. Here we report the first fossil chimpanzee. These fossils, from the Kapthurin Formation, Kenya, show that representatives of Pan were present in the East African Rift Valley during the Middle Pleistocene, where they were contemporary with an extinct species of Homo. Habitats suitable for both hominins and chimpanzees were clearly present there during this period, and the Rift Valley did not present an impenetrable barrier to chimpanzee occupation.

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Figure 1: Map showing current (solid black) and historical (stippled) ranges of Pan in equatorial Africa relative to major features of the eastern and western Rift Valleys.
Figure 2
Figure 3: Central upper incisors of Pan from the Kapthurin Formation, Kenya.
Figure 4: Upper left first molar (KNM-TH 45520).

References

  1. Ruvolo, M. E. Molecular phylogeny of the hominoids: inferences from multiple independent DNA sequence data sets. Mol. Biol. Evol. 14, 248–265 (1997)

    CAS  Article  Google Scholar 

  2. Darwin, C. The Descent of Man and Selection in Relation to Sex (John Murray, London, 1871)

    Book  Google Scholar 

  3. Washburn, S. L. in Changing Perspectives on Man (ed. Rothblatt, B.) 193–201 (Univ. Chicago Press, Chicago, 1968)

    Google Scholar 

  4. Kortlandt, A. New Perspectives on Ape and Human Evolution (Univ. Amsterdam, Amsterdam, 1972)

    Google Scholar 

  5. Pilbeam, D. & Young, N. Hominoid evolution: synthesizing disparate data. C. R. Palevol. 3, 305–321 (2004)

    Article  Google Scholar 

  6. Coppens, Y. East side story: the origin of mankind. Sci. Am. 270, 88–95 (1994)

    ADS  CAS  Article  Google Scholar 

  7. Martyn, J. The Geologic History of the Country Between Lake Baringo and the Kerio River, Baringo District, Kenya (PhD dissertation, Univ. London, 1969)

    Google Scholar 

  8. Tallon, P. in Geological Background to Fossil Man (ed. Bishop, W. W.) 361–373 (Scottish Academic Press, Edinburgh, 1978)

    Google Scholar 

  9. McBrearty, S., Bishop, L. C. & Kingston, J. Variability in traces of Middle Pleistocene hominid behaviour in the Kapthurin Formation, Baringo, Kenya. J. Hum. Evol. 30, 563–580 (1996)

    Article  Google Scholar 

  10. McBrearty, S. in Late Cenozoic Environments and Hominid Evolution: a Tribute to Bill Bishop (eds Andrews, P. & Banham, P.) 143–156 (Geological Society, London, 1999)

    Google Scholar 

  11. McBrearty, S. & Brooks, A. The revolution that wasn't: a new interpretation of the origin of modern human behaviour. J. Hum. Evol. 39, 453–563 (2000)

    CAS  Article  Google Scholar 

  12. Deino, A. & McBrearty, S. 40Ar/39Ar chronology for the Kapthurin Formation, Baringo, Kenya. J. Hum. Evol. 42, 185–210 (2002)

    Article  Google Scholar 

  13. Leakey, M., Tobias, P. V., Martyn, J. E. & Leakey, R. E. F. An Acheulian industry with prepared core technique and the discovery of a contemporary hominid at Lake Baringo, Kenya. Proc. Prehist. Soc. 35, 48–76 (1969)

    Article  Google Scholar 

  14. Wood, B. A. & Van Noten, F. L. Preliminary observations on the BK 8518 mandible from Baringo, Kenya. Am. J. Phys. Anthropol. 69, 117–127 (1986)

    CAS  Article  Google Scholar 

  15. Renaut, R. W., Tiercelin, J.-J. & Owen, B. in Lake Basins Through Space and Time (eds Gierlowski-Kordesch, E. H. & Kelts, K. R.) 561–568 (Am. Assoc. Petrol. Geol., Tulsa, Oklahoma, 2000)

    Google Scholar 

  16. Bishop, L. C., Hill, A. P. & Kingston, J. in Late Cenozoic Environments and Hominid Evolution: a Tribute to Bill Bishop (eds Andrews, P. & Banham, P.) 99–112 (Geological Society, London, 1999)

    Google Scholar 

  17. Johanson, D. C. Some metric aspects of the permanent and deciduous dentition of the pygmy chimpanzee (Pan paniscus). Am. J. Phys. Anthropol. 41, 39–48 (1974)

    Article  Google Scholar 

  18. Dean, M. C. & Reid, D. J. Perikymata spacing and distribution on hominid anterior teeth. Am. J. Phys. Anthropol. 116, 209–215 (2001)

    CAS  Article  Google Scholar 

  19. Swindler, D. R. Primate Dentition: An Introduction to the Teeth of Non-Human Primates (CUP, Cambridge, 2002)

    Book  Google Scholar 

  20. Kinzey, W. G. in The Pygmy Chimpanzee (ed. Susman, R. L.) 65–88 (Plenum, New York, 1984)

    Book  Google Scholar 

  21. Smith, B. H., Crummett, T. L. & Brandt, K. L. Ages of eruption of primate teeth: a compendium for aging individuals and comparing life histories. Yearb. Phys. Anthropol. 37, 177–232 (1994)

    Article  Google Scholar 

  22. Kuykendall, K. L., Mahoney, C. J. & Conroy, G. C. Probit and survival analysis of tooth emergence ages in a mixed-longitudinal sample of chimpanzees (Pan troglodytes). Am. J. Phys. Anthropol. 89, 379–399 (1992)

    CAS  Article  Google Scholar 

  23. Anemone, R. L., Watts, E. S. & Swindler, D. R. Dental development of known-age chimpanzees, Pan troglodytes (Primates, Pongidae). Am. J. Phys. Anthropol. 86, 229–241 (1991)

    Article  Google Scholar 

  24. Skinner, M. F. & Hopwood, D. Hypothesis for the causes and periodicity of repetitive linear enamel hypoplasia in large, wild African (Pan troglodytes and Gorilla gorilla) and Asian (Pongo pygmaeus) apes. Am. J. Phys. Anthropol. 123, 216–235 (2004)

    Article  Google Scholar 

  25. Uchida, A. Craniodental Variation Among the Great Apes (Harvard Univ. Peabody Mus., Cambridge, Massachusetts, 1996)

    Google Scholar 

  26. Johanson, D. C. An Odontological Study of the Chimpanzee with Some Implications for Hominoid Evolution (PhD dissertation, Univ. Chicago, 1974)

    Google Scholar 

  27. Kormos, R., Boesch, C., Bakarr, M. I. & Butynski, T. M. West African Chimpanzees: Status Survey and Conservation Action Plan (IUCN Publication Unit, Cambridge, 2003)

    Google Scholar 

  28. McGrew, W. C., Baldwin, P. J. & Tutin, C. E. G. Chimpanzees in a hot, dry and open habitat: Mt. Assirik, Senegal. J. Hum. Evol. 10, 227–244 (1981)

    Article  Google Scholar 

  29. McGrew, W. C., Marchant, L. F. & Nishida, T. Great Ape Societies (CUP, Cambridge, 1996)

    Book  Google Scholar 

  30. Kingston, J. D., Marino, B. & Hill, A. P. Isotopic evidence for Neogene hominid palaeoenvironments in the Kenya Rift Valley. Science 264, 955–959 (1994)

    ADS  CAS  Article  Google Scholar 

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Acknowledgements

We wish to thank B. Kimeu, N. Kanyenze and M. Macharwas, who found the chimpanzee fossils reported here. Research in the Kapthurin Formation is carried out with the support of an NSF grant to S.M., and under a research permit from the Government of the Republic of Kenya and a permit to excavate from the Minister for Home Affairs and National Heritage of the Republic of Kenya. Both of these are issued to A. Hill and the Baringo Paleontological Research Project, an expedition conducted jointly with the National Museums of Kenya. We also thank personnel of the Departments of Palaeontology, Ornithology and Mammalogy of the National Museums of Kenya, Nairobi; A. Zihlman; and Y. Hailie-Selassie, L. Jellema and M. Ryan for curation and access to specimens. We express gratitude to A. Hill for his comments on the manuscript. We also thank G. Chaplin for drafting Fig. 1, B. Warren for preparing Figs 3 and 4, and A. Bothell for help with submission of the figures. We are grateful to J. Kelley, J. Kingston, M. Leakey, R. Leakey, C. Tryon, A. Walker and S. Ward for discussions. We thank G. Suwa for his remarks.

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Correspondence to Sally McBrearty.

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McBrearty, S., Jablonski, N. First fossil chimpanzee. Nature 437, 105–108 (2005). https://doi.org/10.1038/nature04008

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