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Bird-like fossil footprints from the Late Triassic

Naturevolume 417pages936938 (2002) | Download Citation

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  • This article was retracted on 07 August 2013

Abstract

The study of fossilized footprints and tracks of dinosaurs and other vertebrates has provided insight into the origin, evolution and extinction of several major groups and their behaviour; it has also been an important complement to their body fossil record1,2,3,4. The known history of birds starts in the Late Jurassic epoch (around 150 Myr ago) with the record of Archaeopteryx5, whereas the coelurosaurian ancestors of the birds date back to the Early Jurassic6. The hind limbs of Late Triassic epoch theropods lack osteological evidence for an avian reversed hallux and also display other functional differences from birds7. Previous references to suggested Late Triassic to Early Jurassic bird-like footprints have been reinterpreted as produced by non-avian dinosaurs having a high angle between digits II and IV8,9 and in all cases their avian affinities have been challenged10. Here we describe well-preserved and abundant footprints with clearly avian characters from a Late Triassic redbed sequence of Argentina11,12, at least 55 Myr before the first known skeletal record of birds. These footprints document the activities, in an environment interpreted as small ponds associated with ephemeral rivers, of an unknown group of Late Triassic theropods having some avian characters.

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References

  1. 1

    Haubold, H. Saurierfährten (Ziemsen, Wittenburg, 1984)

  2. 2

    Thulborn, R. A. Dinosaur Tracks (Chapman & Hall, London, 1990)

  3. 3

    Lockley, M. G. & Hunt, A. P. Dinosaur Tracks and Other Fossil Footprints of the Western United States (Columbia Univ. Press, New York, 1995)

  4. 4

    Lockley, M. G. & Meyer, C. Dinosaur Tracks and other Fossil Footprints of Europe (Columbia Univ. Press, New York, 2000)

  5. 5

    Ostrom, J. H. Bird flight, how did it begin? Am. Sci. 67, 46–56 (1979)

  6. 6

    Padian, K. & Chiappe, L. M. The origin and early evolution of birds. Biol. Rev. 73, 1–42 (1998)

  7. 7

    Gatesy, S. M., Middleton, K. M., Jenkins, F. A. & Shubin, N. H. Three-dimensional preservation of foot movements in Triassic theropod dinosaurs. Nature 339, 141–144 (1999)

  8. 8

    Gierliński, G. Avialian theropod tracks from the Early Jurassic strata of Poland. Zubia 14, 79–87 (1996)

  9. 9

    Rainforth, E. C. Late Triassic–Early Jurassic dinosaur ichnofaunas, eastern North America and Southern Africa. J. Vert. Paleo. 21, 91A (2001)

  10. 10

    Chiappe, L. M. The first 85 million years of avian evolution. Nature 378, 349–355 (1995)

  11. 11

    Caminos, R., Zamuner, A. B., Limarino, O. C. & Fauqué, L. El Triásico superior fosilífero en la Precordillera riojana. Rev. Asoc. Geol. Arg. 50, 262–265 (1995)

  12. 12

    Coughlin, T. J. Linked Orogen-Oblique Fault Zones in the Central Argentine Andes: The Basis of a New Model for Andean Orogenesis and Metallogenesis PhD thesis (Univ. Queensland, 2001)

  13. 13

    Caminos, R. & Fauqué, L. Geologic sheet 2969-II Tinogasta (1:250,000). Ser. Geol. Min. Arg. (2001)

  14. 14

    Artabe, A. E., Brea, M. & Zamuner, A. B. Rhexoxylon brunoi Artabe, Brea et Zamuner, sp. nov., a new Triassic Corystosperm from the Paramillo de Uspallata, Mendoza, Argentina. Rev. Palaeobot. Palyn. 105, 63–74 (1999)

  15. 15

    Gradstein, F. M. et al. A Triassic, Jurassic and Cretaceous time scale. SEPM Spec. Publ. 54, 95–126 (1995)

  16. 16

    Kent, D. V. & Olsen, P. E. Implications of astronomical climate cycles to the chronology of the Late Triassic. Zbl. Geol. Paläont. 8, 1463–1473 (2000)

  17. 17

    Pálfy, J., Smith, P. L. & Mortensen, J. K. A U-Pb and 40Ar/39Ar time scale for the Jurassic. Can. J. Earth Sci. 37, 923–944 (2000)

  18. 18

    Currie, P. Bird footprints from the Gething Formation (Aptian, Lower Cretaceous) of northeastern British Columbia, Canada. J. Vert. Paleontol. 1, 257–264 (1981)

  19. 19

    Lockley, M. G., Yang, S-Y., Matsukawa, M., Fleming, F. & Lim, S-K. The track record of Mesozoic birds: evidence and implications. Phil. Trans. R. Soc. Lond. B 336, 113–134 (1992)

  20. 20

    Fuentes Vidarte, C. Primeras huellas de aves en el Weald de Soria (España). Nuevo icnogénero, Archaeornithipus y nueva icnoespecie. A. meijidi. Est. Geol. 52, 63–75 (1996)

  21. 21

    Doyle, P., Wood, J. L. & George, G. T. The shorebird ichnofacies: an example from the Miocene of southern Spain. Geol. Mag. 137, 517–536 (2000)

  22. 22

    McCrea, R. T. & Sarjeant, W. A. S. in Mesozoic Vertebrate Life (eds Tanke, D. H. & Carpenter, K.) 453–478 (Indiana Univ. Press, Bloomington/Indianapolis, 2001)

  23. 23

    Lockley, M. G. The vertebrate track record. Nature 396, 429–432 (1998)

  24. 24

    Ellenberger, P. Contribution à la classification des pistes de vertébrés du Trias: Les types du Stormberg d'Afrique du Sud (I). Palaeovert. Mém. Extraordinaire., 1–128 (1972)

  25. 25

    Weems, R. E. & Kimmel, P. G. Upper Triassic reptile footprints and a coelacanth fish scale from the Culpeper basin, Virginia. Proc. Biol. Soc. Wash. 106, 390–401 (1993)

  26. 26

    Gierlinski, G. & Sabath, K. Protoavian affinity of the Plesiornis trackmaker. J. Vert. Paleo. 18, 46A (1998)

  27. 27

    Heckert, A. B. & Lucas, S. G. Global correlation of the Triassic theropod record. Gaia 15, 63–74 (1998)

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Acknowledgements

This work was funded by the Agencia Nacional de Promoción Cientifica y Technologica of Argentina. M. Archangelsky helped during fieldwork. We thank T. Coughlin for sharing unpublished geochronological data. W.A.S. Sarjeant critically read the manuscript and A. Zamuner commented on biostratigraphical implications of the fossil flora.

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Affiliations

  1. CONICET, Av. Uruguay 151, 6300, Santa Rosa, La Pampa, Argentina

    • Ricardo N. Melchor
    •  & Jorge F. Genise
  2. Universidad Nacional de La Pampa, Av. Uruguay 151, 6300, Santa Rosa, La Pampa, Argentina

    • Ricardo N. Melchor
  3. Museo Paleontológico “Egidio Feruglio”, Av. Fontana 140, 9100, Trelew, Chubut, Argentina

    • Silvina de Valais
    •  & Jorge F. Genise

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The authors declare that they have no competing financial interests.

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Correspondence to Ricardo N. Melchor.

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https://doi.org/10.1038/nature00818

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