New look at the origin of birds and crocodiles

Abstract

DURING the period 1926–73 most ornithologists and vertebrate palaeontologists supported Heilmann's theory of avian origins. Heilmann1 argued that all dinosaurs and pterosaurs were too specialised to have been ancestral to birds. Instead he chose to derive birds directly from a primitive group of Triassic archosaurs, the Pseudosuchia. Heilmann's theory has recently been challenged by Walker2–4, who has suggested that birds evolved from an early crocodilian, and by Ostrom5–10, who argued that birds descended from theropod dinosaurs. We recently began a study of the otic region in archosaurs and birds, in search of advanced, homologous features which would give definitive support to one theory or the other. The results of this investigation, discussed below, strongly support a hypothesis of a common pseudosuchian origin for birds and crocodiles, independent of dinosaurs.

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References

  1. 1

    Heilmann, G. The Origin of Birds (Witherby, London, 1926).

    Google Scholar 

  2. 2

    Walker, A. D. Nature 237, 257–263 (1972).

    ADS  Article  Google Scholar 

  3. 3

    Walker, A. D. in McGraw-Hill Yearbook Science and Technology (ed. Lapedes, D. N.) 177–179 (McGraw-Hill, New York, 1974).

    Google Scholar 

  4. 4

    Walker, A. D. in Problems in Vertebrate Evolution (ed. Andrews, S. M.) 319–358 (Linnean Society, London, 1977).

    Google Scholar 

  5. 5

    Ostrom, J. H. Nature 242, 136 (1973).

    ADS  Article  Google Scholar 

  6. 6

    Ostrom, J. H. Q. Rev. Biol. 49, 27–47 (1974).

    Article  Google Scholar 

  7. 7

    Ostrom, J. H. A. Rev. Earth planet. Sci. 3, 55–57 (1975).

    ADS  Article  Google Scholar 

  8. 8

    Ostrom, J. H. Proc. Centre natn. Rech. Sci. 218, 519–532 (1975).

    Google Scholar 

  9. 9

    Ostrom, J. H. Smithson. Contr. Paleobiol. 27, 1–21 (1976).

    Google Scholar 

  10. 10

    Ostrom, J. H. Biol. J. Linnean Soc., Lond. 8, 91–182 (1976).

    Article  Google Scholar 

  11. 11

    Baird, I. L. in Biology of the Reptilia: Morphology B Vol. 2 (eds Gans, C. & Parsons, T. S.) 193–275 (Academic, London, 1970).

    Google Scholar 

  12. 12

    de Beer, G. R. The Development of the Vertebrate Skull (Oxford University Press, London, 1937).

    Google Scholar 

  13. 13

    Romer, A. S. Osteology of the Reptiles (University of Chicago Press, Chicago, 1956).

    Google Scholar 

  14. 14

    Osborn, H. F. Mem. Am. Mus. nat. Hist. n.s. 1, 1–30 (1912).

    Google Scholar 

  15. 15

    Colbert, E. H. & Russell, D. A. Am. Mus. Novit. 2380, 1–49 (1969).

    Google Scholar 

  16. 16

    Cruickshank, A. R. in Proc. 2nd Int. Symp. Gondwana Stratigr. Palaeont. (ed. Haughton, S. H.) 683–685 (CSIR, Pretoria, South Africa, 1970).

    Google Scholar 

  17. 17

    Cruickshank, A. R. in Studies in Vertebrate Evolution (eds Joysey, K. A. & Kemp, T. S.) 89–119 (Oliver and Boyd, Edinburgh, 1972).

    Google Scholar 

  18. 18

    Camp, C. L. Mem. Univ. Calif. 10, 1–161 (1930).

    Google Scholar 

  19. 19

    Gow, C. E. Palaeont. afr. 18, 89–131 (1975).

    Google Scholar 

  20. 20

    Henson, O. W. in Handbook of Sensory Physiology Vol. 5 (eds Keidel, W. D. & Neff, W. D.) 39–110 (Springer-Verlag, Berlin, 1974).

    Google Scholar 

  21. 21

    Webster, D. B. Am. Zool. 6, 451–466 (1966).

    CAS  Article  Google Scholar 

  22. 22

    Charig, A. J. in Studies in Vertebrate Evolution (eds Joysey, K. A. & Kemp, T. S.) 121–155 (Oliver and Boyd, Edinburgh, 1972).

    Google Scholar 

  23. 23

    Retzius, G. Das Gehororgan der Wirbeltiere Vol. 2 (Stockholm, 1884).

    Google Scholar 

  24. 24

    de Burlet, H. M. in Handbuch der vergleischenden Anatomie der Wirbeltiere Vol. 2 (eds Bolk, L. et al.) 1293–1432 (Berlin, 1934).

    Google Scholar 

  25. 25

    Gray, A. A. The Labyrinth of Animals (Churchill, London, 1908).

    Google Scholar 

  26. 26

    Janensch, W. Palaeontographica Suppl. 7, 147–298 (1929–35).

    Google Scholar 

  27. 27

    Lapparent, A. F. & Lavocat, R. in Traite de Paleontologie Vol. 5 (ed. Piveteau, J.) 785–962 (Masson, Paris, 1955).

    Google Scholar 

  28. 28

    Langston, W. Fieldiana, Geol. Mem. 3, 315–361 (1960).

    Google Scholar 

Download references

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WHETSTONE, K., MARTIN, L. New look at the origin of birds and crocodiles. Nature 279, 234–236 (1979). https://doi.org/10.1038/279234a0

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