Fossils reveal the complex evolutionary history of the mammalian regionalized spine

Author:

Jones K. E.1ORCID,Angielczyk K. D.2,Polly P. D.3ORCID,Head J. J.4ORCID,Fernandez V.5,Lungmus J. K.6ORCID,Tulga S.7,Pierce S. E.1ORCID

Affiliation:

1. Museum of Comparative Zoology and Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA.

2. Integrative Research Center, Field Museum of Natural History, Chicago, IL 60605, USA.

3. Department of Earth and Atmospheric Sciences, Indiana University, Bloomington, IN 47405, USA.

4. Department of Zoology and University Museum of Zoology, University of Cambridge, Cambridge CB2 3EJ, UK.

5. European Synchrotron Radiation Facility, 38000 Grenoble, France.

6. Department of Organismal Biology and Anatomy, University of Chicago, Chicago, IL 60637, USA.

7. Department of Geophysical Sciences, University of Chicago, Chicago, IL 60637, USA.

Abstract

Early shifts lead to big changes Mammals represent one of the most morphologically diverse taxonomic groups. One of the unique features underlying this diversity is variability of the spine, which facilitates everything from flexibility for speedy running and support for upright walking. Jones et al. studied a group ancestral to modern mammals—nonmammalian synapsids, or mammal-like reptiles. As forelimb function diversified, the spine developed distinct regions. These regions then differentiated further, leading to the highly varied mammalian forms we see today. Science , this issue p. 1249

Funder

National Science Foundation

American Association of Anatomists

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference49 articles.

1. T. S. Kemp The Origin and Evolution of Mammals (Oxford Univ. Press 2005).

2. Cynodont postcranial anatomy and the “prototherian” level of mammalian organization;Jenkins F. A.;Evolution,1970

3. Evolution of the axial system in craniates: morphology and function of the perivertebral musculature

4. Comparative biologic-anatomical investigations on the vertebral column and spinal musculature of mammals;Slijper E. J.;Verh. K. Ned. Akad. Wet. Afd. Natuurkd. Tweede Reeks,1946

5. The evolution of locomotor stamina in tetrapods: circumventing a mechanical constraint

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