Vertebral architecture in the earliest stem tetrapods

Stephanie E. Pierce (), Per E. Ahlberg, John R. Hutchinson, Julia L. Molnar, Sophie Sanchez, Paul Tafforeau and Jennifer A. Clack
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Stephanie E. Pierce: University Museum of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK
Per E. Ahlberg: Evolutionary Biology Centre, Uppsala University, Norbyvägen 18A, 752 36 Uppsala, Sweden
John R. Hutchinson: The Royal Veterinary College, Hawkshead Lane, Hatfield AL9 7TA, UK
Julia L. Molnar: The Royal Veterinary College, Hawkshead Lane, Hatfield AL9 7TA, UK
Sophie Sanchez: Evolutionary Biology Centre, Uppsala University, Norbyvägen 18A, 752 36 Uppsala, Sweden
Paul Tafforeau: European Synchrotron Radiation Facility, 6 Rue Jules Horowitz, BP 220, 38043 Grenoble Cedex, France
Jennifer A. Clack: University Museum of Zoology, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK

Nature, 2013, vol. 494, issue 7436, 226-229

Abstract: X-ray synchrotron microtomography has revealed the three-dimensional vertebral architecture of Ichthyostega, and other crucial and celebrated early tetrapods; a surprising feature is the relationship between the vertebral elements, with the pleurocentra unexpectedly attached to the succeeding intercentrum, suggesting a ‘reverse’ rhachitomous design.

Date: 2013
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DOI: 10.1038/nature11825

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