Reassessment of the Evidence for Postcranial Skeletal Pneumaticity in Triassic Archosaurs, and the Early Evolution of the Avian Respiratory System

• Richard J. Butler ,

  * E-mail: butler.richard.j@gmail.com

  Affiliations GeoBio-Center, Ludwig-Maximilians-Universität München, Munich, Germany, Department of Palaeontology, Natural History Museum, London, United Kingdom

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• Paul M. Barrett,

  Affiliation Department of Palaeontology, Natural History Museum, London, United Kingdom

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• David J. Gower

  Affiliation Department of Zoology, Natural History Museum, London, United Kingdom

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