Pulmonary Function and Metabolic Physiology of Theropod Dinosaurs

Author:

Ruben John A.1,Dal Sasso Cristiano1,Geist Nicholas R.1,Hillenius Willem J.1,Jones Terry D.1,Signore Marco1

Affiliation:

1. J. A. Ruben, N. R. Geist, T. D. Jones, Zoology Department, Oregon State University, Corvallis, Oregon 97331, USA. C. Dal Sasso, Museo Civico di Storia Naturale, Corso Venezia 55, Milano 20121, Italy. W. J. Hillenius, Department of Biology, College of Charleston, Charleston, SC 29424, USA. M. Signore, Department of Geology, University of Bristol, Bristol BS8 1RJ, UK.

Abstract

Ultraviolet light analysis of a fossil of the theropod dinosaur Scipionyx samniticus revealed that the liver subdivided the visceral cavity into distinct anterior pleuropericardial and posterior abdominal regions. In addition, Scipionyx apparently had diaphragmatic musculature and a dorsally attached posterior colon. These features provide evidence that diaphragm-assisted lung ventilation was present in theropods and that these dinosaurs may have used a pattern of exercise physiology unlike that in any group of living tetrapods.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference23 articles.

1. R. E. H. Reid in The Complete Dinosaur J. O. Farlow and M. K. Brett-Surman Eds. (Indiana Univ. Press Bloomington 1997) pp. 449–473.

2. Lung Structure and Ventilation in Theropod Dinosaurs and Early Birds

3. Hengst R., ibid. 281, 47 (1998).

4. Dal Sasso C., Signore M., Nature 392, 383 (1998).

5. ___ in Third European Workshop of Vertebrate Paleontology-Maastricht J. W. M. Jagt P. H. Lambers E. W. A. Mulder A. S. Schulp Eds. (Naturhistorisches Museum Maastricht The Netherlands 1998) p. 23.

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