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An autopodial-like pattern of Hox expression in the fins of a basal actinopterygian fish

Author

Listed:
  • Marcus C. Davis

    (The University of Chicago, Chicago, Illinois 60637, USA)

  • Randall D. Dahn

    (The University of Chicago, Chicago, Illinois 60637, USA)

  • Neil H. Shubin

    (The University of Chicago, Chicago, Illinois 60637, USA
    Field Museum of Natural History, 1400 South Lake Shore Drive, Chicago, Illinois 60605, USA)

Abstract

Limbering up The limbs of tetrapods (land-living vertebrates) are usually thought of as evolutionary innovations unique to that group. Now a study of Hox gene expression during development of the fins of a 'living fossil', the paddlefish Polyodon spathula, shows that patterns of gene expression and regulation thought characteristic of the tetrapod limb are found in the fins of basal ray-finned fish. The paddlefish is one of the few relics of a type of bony fish common in the seas more than 250 million years ago. The work shows that some aspects of limb development are primitive and held in common by all bony fish — but have been lost in highly evolved fishes such as the zebra fish. These results are in accord with recent new fossil discoveries such as Tiktaalik, a fish that shows skeletal progression from fish to tetrapod.

Suggested Citation

  • Marcus C. Davis & Randall D. Dahn & Neil H. Shubin, 2007. "An autopodial-like pattern of Hox expression in the fins of a basal actinopterygian fish," Nature, Nature, vol. 447(7143), pages 473-476, May.
    • Handle: RePEc:nat:nature:v:447:y:2007:i:7143:d:10.1038_nature05838
    DOI: 10.1038/nature05838
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