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A new species of great ape from the late Miocene epoch in Ethiopia - Nature

  • ️Beyene, Yonas
  • ️Thu Aug 23 2007
  • Letter
  • Published: 23 August 2007

Nature volume 448, pages 921–924 (2007)Cite this article

Abstract

With the discovery of Ardipithecus, Orrorin and Sahelanthropus1,2,3,4,5,6,7, our knowledge of hominid evolution before the emergence of Pliocene species of Australopithecus8,9 has significantly increased, extending the hominid fossil record back to at least 6 million years (Myr) ago. However, because of the dearth of fossil hominoid remains in sub-Saharan Africa spanning the period 12–7 Myr ago, nothing is known of the actual timing and mode of divergence of the African ape and hominid lineages. Most genomic-based studies suggest a late divergence date—5–6 Myr ago and 6–8 Myr ago for the human–chimp and human–gorilla splits, respectively10,11,12,13,14—and some palaeontological and molecular analyses hypothesize a Eurasian origin of the African ape and hominid clade15,16. We report here the discovery and recognition of a new species of great ape, Chororapithecus abyssinicus, from the 10–10.5-Myr-old deposits of the Chorora Formation at the southern margin of the Afar rift. To the best of our knowledge, these are the first fossils of a large-bodied Miocene ape from the African continent north of Kenya. They exhibit a gorilla-sized dentition that combines distinct shearing crests with thick enamel on its ‘functional’ side cusps. Visualization of the enamel–dentine junction by micro-computed tomography reveals shearing crest features that partly resemble the modern gorilla condition. These features represent genetically based structural modifications probably associated with an initial adaptation to a comparatively fibrous diet. The relatively flat cuspal enamel–dentine junction and thick enamel, however, suggest a concurrent adaptation to hard and/or abrasive food items. The combined evidence suggests that Chororapithecus may be a basal member of the gorilla clade, and that the latter exhibited some amount of adaptive and phyletic diversity at around 10–11 Myr ago.

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References

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

    Article  ADS  CAS  Google Scholar 

  2. Semaw, S. et al. Early Pliocene hominids from Gona, Ethiopia. Nature 433, 301–305 (2005)

    Article  ADS  CAS  Google Scholar 

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

    Article  ADS  CAS  Google Scholar 

  4. Haile-Selassie, Y., Suwa, G. & White, T. D. Late Miocene teeth from Middle Awash, Ethiopia, and early hominid dental evolution. Science 303, 1503–1505 (2004)

    Article  ADS  CAS  Google Scholar 

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

    Article  Google Scholar 

  6. Brunet, M. et al. A new hominid from the Upper Miocene of Chad, Central Africa. Nature 418, 145–151 (2002)

    Article  ADS  CAS  Google Scholar 

  7. Brunet, M. et al. New material of the earliest hominid from the Upper Miocene of Chad. Nature 434, 752–755 (2005)

    Article  ADS  CAS  Google Scholar 

  8. White, T. D. et al. Asa Issie, Aramis and the origin of Australopithecus. Nature 440, 883–889 (2006)

    Article  ADS  CAS  Google Scholar 

  9. Kimbel, W. H. et al. Was Australopithecus anamensis ancestral to A. afarensis? A case of anagenesis in the hominin fossil record. J. Hum. Evol. 51, 134–152 (2006)

    Article  Google Scholar 

  10. Horai, S., Hayasaka, K., Kondo, R., Tsugane, K. & Takahata, N. Recent African origin of modern humans revealed by complete sequences of hominoid mitochondrial DNAs. Proc. Natl Acad. Sci. USA 92, 532–536 (1995)

    Article  ADS  CAS  Google Scholar 

  11. Chen, F.-C. & Li, W.-H. Genomic divergences between humans and other hominoids and the effective population size of the common ancestor of humans and chimpanzees. Am. J. Hum. Genet. 68, 444–456 (2001)

    Article  CAS  Google Scholar 

  12. Stauffer, R. L., Walker, A., Ryder, O. A., Lyons-Weiler, M. & Hedges, S. B. Human and ape molecular clocks and constraints on paleontological hypotheses. J. Hered. 92, 469–474 (2001)

    Article  CAS  Google Scholar 

  13. Glazko, G. V. & Nei, M. Estimation of divergence times for major lineages of primate species. Mol. Biol. Evol. 20, 424–434 (2003)

    Article  CAS  Google Scholar 

  14. Kumar, S., Filipski, A., Swarna, V., Walker, A. & Hedges, S. B. Placing confidence limits on the molecular age of the human–chimpanzee divergence. Proc. Natl Acad. Sci. USA 102, 18842–18847 (2005)

    Article  ADS  CAS  Google Scholar 

  15. Stewart, C.-B. & Disotell, T. R. Primate evolution — in and out of Africa. Curr. Biol. 8, R582–R588 (1998)

    Article  CAS  Google Scholar 

  16. Begun, D. R. Sivapithecus is east and Dryopithecus is west, and never the twain shall meet. Anthropol. Sci. 113, 53–64 (2005)

    Article  Google Scholar 

  17. Geraads, D., Alemseged, Z. & Bellon, H. The late Miocene mammalian fauna of Chorora, Awash basin, Ethiopia: systematics, biochronology and the 40K–40Ar ages of the associated volcanics. Tertiary Res. 21, 113–122 (2002)

    Google Scholar 

  18. Sickenberg, O. & Schönfeld, M. in Afar Depression of Ethiopia (eds Pilger, A. & Rösler, A.) 277–284 (Schweizerbart, Stuttgart, 1975)

    Google Scholar 

  19. Kunz, K., Kreuzer, H. & Müller, P. in Afar Depression of Ethiopia (eds Pilger, A. & Rösler, A.) 370–374 (Schweizerbart, Stuttgart, 1975)

    Google Scholar 

  20. Tiercelin, J.-J., Michaux, J. & Bandet, Y. Le Miocène supérieur du Sud de la Dépression de ľAfar, Ėthiopia: sédiments, faunas, âges isotopiques. Bull. Soc. Geol. Fr. 21, 255–258 (1979)

    Article  Google Scholar 

  21. Bernor, R. L., Kaiser, T. M. & Nelson, S. V. The oldest Ethiopian hipparion (Equinae, Perissodactyla) from Chorora: Systematics, paleodiet and paleoclimate. Courier Forschungsinst. Senckenberg 246, 213–226 (2004)

    Google Scholar 

  22. Pickford, M. & Kunimatsu, Y. Catarrhines from the Middle Miocene (ca. 14.5 Ma) of Kipsaraman, Tugen Hills, Kenya. Anthropol. Sci. 113, 189–224 (2005)

    Article  Google Scholar 

  23. Jernvall, J., Keränen, S. V. E. & Thesleff, I. Evolutionary modification of development in mammalian teeth: Quantifying gene expression patterns and topography. Proc. Natl Acad. Sci. USA 97, 14444–14448 (2000)

    Article  ADS  CAS  Google Scholar 

  24. Kangas, A. T., Evans, A. R., Thesleff, I. & Jernvall, J. Nonindependence of mammalian dental characters. Nature 432, 211–214 (2004)

    Article  ADS  CAS  Google Scholar 

  25. McCollum, M. & Sharpe, P. T. Evolution and development of teeth. J. Anat. 199, 153–159 (2001)

    Article  CAS  Google Scholar 

  26. Hlusko, L. J. & Mahaney, M. C. Genetic contributions to expression of the baboon cingular remnant. Arch. Oral Biol. 48, 663–672 (2003)

    Article  Google Scholar 

  27. Suwa, G. & Kono, R. T. A micro-CT based study of linear enamel thickness in the mesial cusp section of human molars: reevaluation of methodology and assessment of within-tooth, serial, and individual variation. Anthropol. Sci. 113, 273–289 (2005)

    Article  Google Scholar 

  28. Kono, R. T. Molar enamel thickness and distribution patterns in extant great apes and humans: new insights based on a 3-dimensional whole crown perspective. Anthropol. Sci. 112, 121–146 (2004)

    Article  Google Scholar 

  29. 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 (1997)

    Google Scholar 

  30. Nakatsukasa, M. et al. Late Miocene primate fauna in Nakali, central Kenya. Am. J. Phys. Anthropol. 129 (suppl. 42). 136 (2006)

    Google Scholar 

Download references

Acknowledgements

We thank the National Science Foundation Revealing Hominid Origins Initiative (RHOI) and the Japan Society for the Promotion of Science for financial support of field and laboratory research. We thank W. Amerga and K. Kairente for field work; A. Ademassu for supporting laboratory work; J.-R. Boisserie, M. Brunet, Y. Haile-Selassie, C. O. Lovejoy and T. White for observations and/or discussions; the staff of the Culture and Tourism Bureau Western Hararge Chiro Zone and the administration of the Mieso Woreda for fieldwork support; the Oromiya Culture and Toursim Bureau Addis Ababa for facilitation; and the Authority for Research and Conservation of Cultural Heritage and the National Museum of Ethiopia, Ministry of Culture and Tourism of Ethiopia for permissions and support. We thank the following institutions and staff for access to comparative materials: National Museum of Ethiopia; National Museums of Kenya; Transvaal Museum, South Africa; Royal Museum of Central Africa, Tervuren; Naturalis, Leiden; Cleveland Museum of Natural History; the University of California at Berkeley, Human Evolution Research Center; and the National Museum of Nature and Science, Tokyo, Department of Zoology.

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Authors and Affiliations

  1. The University Museum, the University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan,

    Gen Suwa

  2. Department of Anthropology, National Museum of Nature and Science, Hyakunincho, Shinjuku-ku, Tokyo 169-0073, Japan,

    Reiko T. Kono

  3. Division of Natural History, Hyogo Museum of Nature and Human Activities, Sanda, Hyogo 669-1546, Japan,

    Shigehiro Katoh

  4. Rift Valley Research Service, P.O. Box 5717, Addis Ababa, Ethiopia,

    Berhane Asfaw

  5. Department of Archaeology and Paleontology, Authority for Research and Conservation of Cultural Heritage, Ministry of Culture and TourismP.O. Box 13247, Addis Ababa, Ethiopia,

    Yonas Beyene

Authors

  1. Gen Suwa

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  2. Reiko T. Kono

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  3. Shigehiro Katoh

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  4. Berhane Asfaw

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  5. Yonas Beyene

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Correspondence to Gen Suwa.

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Suwa, G., Kono, R., Katoh, S. et al. A new species of great ape from the late Miocene epoch in Ethiopia. Nature 448, 921–924 (2007). https://doi.org/10.1038/nature06113

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  • Received: 18 June 2007

  • Accepted: 25 July 2007

  • Issue Date: 23 August 2007

  • DOI: https://doi.org/10.1038/nature06113

Editorial Summary

Gorillas leave the line

Timing the divergence between the gorilla, chimp and human lineages has been the province of molecular phylogeny largely unconstrained by fossil evidence. Gen Suwa et al. now present fossil teeth from Ethiopia which look very similar to those of a modern gorilla, even though they are 10 million years old. If the teeth, assigned to a new species of fossil ape, are from a creature on the gorilla lineage, then the divergence between gorillas and the chimp–human stock must have happened before that time, constraining divergence dates reached through the comparison of contemporary genetic sequences.