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A new hominid from the Upper Miocene of Chad, Central Africa

An Erratum to this article was published on 15 August 2002

Abstract

The search for the earliest fossil evidence of the human lineage has been concentrated in East Africa. Here we report the discovery of six hominid specimens from Chad, central Africa, 2,500 km from the East African Rift Valley. The fossils include a nearly complete cranium and fragmentary lower jaws. The associated fauna suggest the fossils are between 6 and 7 million years old. The fossils display a unique mosaic of primitive and derived characters, and constitute a new genus and species of hominid. The distance from the Rift Valley, and the great antiquity of the fossils, suggest that the earliest members of the hominid clade were more widely distributed than has been thought, and that the divergence between the human and chimpanzee lineages was earlier than indicated by most molecular studies.

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Figure 1: Cranium of Sahelanthropus tchadensis gen. et sp. nov. holotype (TM 266-01-060-1).
Figure 2: Sahelanthropus tchadensis gen. et sp. nov. paratypes.
Figure 3: Vertical (superoinferior) thickness of the supraorbital torus in extant hominoids, A. africanus and S. tchadensis gen. et sp. nov.

References

  1. Dart, R. A. Australopithecus africanus, the man-ape of South Africa. Nature 115, 195–199 (1925)

    Article  ADS  Google Scholar 

  2. Kortlandt, A. New Perspectives on Ape and Human Evolution 9–100 (Stichting voor Psychobiologie, Amsterdam, 1972)

    Google Scholar 

  3. Coppens, Y. Le singe, l'Afrique et l'Homme (Fayard, Paris, 1983)

    Google Scholar 

  4. Leakey, M. G. et al. New hominin genus from eastern Africa shows diverse middle Pliocene lineages. Nature 410, 433–440 (2001)

    Article  ADS  CAS  Google Scholar 

  5. Leakey, M. G., Feibel, C. S., McDougall, I. & Walker, A. C. New four-million-year-old hominid species from Kanapoi and Allia Bay, Kenya. Nature 376, 565–571 (1995)

    Article  ADS  CAS  Google Scholar 

  6. White, T. D., Suwa, G. & Asfaw, B. Australopithecus ramidus, a new species of hominid from Aramis, Ethiopia. Nature 371, 306–312 (1994)

    Article  ADS  CAS  Google Scholar 

  7. Haile-Selassie, Y. Late Miocene hominids from the Middle Awash, Ethiopia. Nature 412, 178–181 (2001)

    Article  ADS  CAS  Google Scholar 

  8. Senut, B. et al. First hominid from the Miocene (Lukeino Formation, Kenya). C. R. Acad. Sci. Paris 332, 137–144 (2001)

    Article  Google Scholar 

  9. Deino, A. L., Tauxe, L., Monaghan, M. & Hill, A. 40Ar/39Ar geochronology and paleomagnetic stratigraphy of the Lukeino and lower Chemeron Formations at Tabarin and Kapcheberek, Tugen Hills, Kenya. J. Hum. Evol. 42, 117–140 (2002)

    Article  Google Scholar 

  10. Brunet, M. et al. The first australopithecine 2500 kilometres west of the Rift Valley (Chad). Nature 378, 273–275 (1995)

    Article  ADS  CAS  Google Scholar 

  11. Brunet, M. et al. Australopithecus bahrelghazali, une nouvelle espèce d'Hominidé ancien de la région de Koro Toro (Tchad). C. R. Acad. Sci. Paris 322, 907–913 (1996)

    Google Scholar 

  12. Vignaud, P. et al. Geology and palaeontology of the Upper Miocene Toros-Menalla hominid locality, Chad. Nature 418, 152–155 (2002)

    Article  ADS  CAS  Google Scholar 

  13. McDougall, I. & Feibel, C. S. Numerical age control for the Miocene–Pliocene succession at Lothagam, a hominoid-bearing sequence in the northern Kenya Rift. J. Geol. Soc. Lond. 156, 731–745 (1999)

    Article  CAS  Google Scholar 

  14. Ishida, H. & Pickford, M. A new Late Miocene hominoid from Kenya: Samburupithecus kiptalami gen. et sp. nov. C. R. Acad. Sci. Paris 325, 823–829 (1998)

    Google Scholar 

  15. Bonis, L. de & Koufos, G. D. The face and the mandible of Ouranopithecus macedoniensis: description of new specimens and comparisons. J. Hum. Evol. 24, 469–491 (1993)

    Article  Google Scholar 

  16. Pilbeam, D. New hominoid skull material from the Miocene of Pakistan. Nature 295, 232–234 (1982)

    Article  ADS  CAS  Google Scholar 

  17. Kordos, L. & Begun, D. R. A new cranium of Dryopithecus from Rudabanya, Hungary. J. Hum. Evol. 41, 689–700 (2001)

    Article  CAS  Google Scholar 

  18. Tobias, P. V. The Cranium and Maxillary Dentition of Australopithecus (Zinjanthropus) boisei, Olduvai Gorge (Cambridge Univ. Press, London, 1967)

    Book  Google Scholar 

  19. Kimbel, W. H., White, T. D. & Johanson, D. C. Cranial morphology of Australopithecus afarensis; A comparative study based on a composite reconstruction of the adult skull. Am. J. Phys. Anthropol. 64, 337–388 (1984)

    Article  CAS  Google Scholar 

  20. Ward, C. V., Leakey, M. G. & Walker, A. Morphology of Australopithecus anamensis from Kanapoi and Allia Bay, Kenya. J. Hum. Evol. 41, 235–368 (2001)

    Article  Google Scholar 

  21. Kimbel, W. H., Johanson, D. C. & Rak, Y. The first skull and other new discoveries of Australopithecus afarensis at Hadar, Ethiopia. Nature 368, 449–451 (1994)

    Article  ADS  CAS  Google Scholar 

  22. Wood, B. Koobi Fora Research Project: Hominid Cranial Remains Vol. 4 (Clarendon, Oxford, 1991)

    Google Scholar 

  23. Kumar, S. & Hedges, B. A molecular time scale for vertebrate evolution. Nature 392, 917–920 (1998)

    Article  ADS  CAS  Google Scholar 

  24. Pilbeam, D. in The Primate Fossil Record (ed. Hartwig, W.) 303–310 (Columbia Univ. Press, New York, 2002)

    Google Scholar 

  25. Kimbel, W. H. Systematic assessment of a maxilla of Homo from Hadar, Ethiopia. Am. J. Phys. Anthop. 103, 235–262 (1997)

    Article  CAS  Google Scholar 

  26. Uchida, A. Intra-species Variation among the Great-Apes: Implications for Taxonomy of Fossil Hominoids Thesis, Harvard Univ. (1992)

    Google Scholar 

  27. Lockwood, C. A., Kimbel, W. H. & Johanson, D. C. Temporal trends and metric variation in the mandibles and dentition of A. afarensis. J. Hum. Evol. 39, 23–55 (2000)

    Article  CAS  Google Scholar 

  28. Lockwood, C. A. Sexual dimorphism in the face of Australopithecus africanus. Am. J. Phys. Anthropol. 108, 97–127 (1999)

    Article  CAS  Google Scholar 

Download references

Acknowledgements

We thank the Chadian Authorities (Ministère de l'Education Nationale de l'Enseignement Supérieur et de la Recherche, Université de N'djaména, CNAR). We extend gratitude for their support to the French Ministries, Ministère Français de l'Education Nationale (Faculté des Sciences, Université de Poitiers), Ministère de la Recherche (CNRS), Ministère des Affaires Etrangères (Direction de la Coopération Scientifique, Universitaire et de Recherche, Paris, and SCAC Ambassade de France à N'djaména), to the Région Poitou-Charentes, the Département de la Vienne, the Association pour le Prix scientifique Philip Morris, and also to the Armée Française (MAM and Epervier) for logistic support. For giving us the opportunity to work with their collections, we are grateful to the National Museum of Ethiopia, the National Museum of Kenya, the Peabody Museum and Harvard University, the Institute of Human Origins and the University of California. Special thanks to Scanner-IRM Poitou Charentes (P. Chartier and F. Perrin), for industrial scanner to EMPA (A. Flisch Ing. HTL) and to Multimedia Laboratorium-Computer Department, University of Zurich-Irchel (P. Stucki). Many thanks to all our colleagues and friends for their help and discussion, and particularly to F. Clark Howell, A. Garaudel, Y. Haile-Selassie, D. Johanson, W. Kimbel, M. G. Leakey, D. Lieberman, R. Macchiarelli, M. Pickford, B. Senut, G. Suwa, T. White and Lubaka. We especially thank all the other MPFT members who joined us for the field missions, and V. Bellefet, S. Riffaut and J.-C. Bertrand for technical support. We are most grateful to G. Florent for administrative guidance. We dedicate this article to J. D. Clark. All authors are members of the MPFT.

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Brunet, M., Guy, F., Pilbeam, D. et al. A new hominid from the Upper Miocene of Chad, Central Africa. Nature 418, 145–151 (2002). https://doi.org/10.1038/nature00879

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