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Cardiovascular Evidence for an Intermediate or Higher Metabolic Rate in an Ornithischian Dinosaur
Paul E. Fisher,1*
Dale A. Russell,2
Michael
K. Stoskopf,3
Reese E. Barrick,4
Michael Hammer,5
Andrew A. Kuzmitz6
Computerized tomography scans of a ferruginous
concretion within the chest region of an ornithischian dinosaur reveal
structuresthat are suggestive of a four-chambered heart and a single
systemicaorta. The apparently derived condition of the cardiovascularsystem in turn suggests the existence of intermediate-to-highmetabolic
rates among dinosaurs.
1 Biomedical Imaging Facility, College of Veterinary
Medicine, North Carolina State University, 4700 Hillsborough
Street, Raleigh, NC 27606, USA.
2 North Carolina
State Museum of Natural Sciences and Department of Marine, Earth, and
Atmospheric Sciences, North Carolina State University, Raleigh, NC
27695, USA.
3 Department of Clinical Sciences,
College of Veterinary Medicine, and Environmental Medicine Consortium,
North Carolina State University, Raleigh, NC 27606, USA.
4 Department of Marine, Earth, and Atmospheric
Sciences, North Carolina State University, Raleigh, NC 27696, USA.
5 Hammer and Hammer Paleotek, 260 Dutchman View
Drive, Jacksonville, OR 97530, USA.
6 595 North Main
Street, Ashland, OR 97520, USA.
*
To whom correspondence should be addressed. E-mail:
Paul_Fisher{at}ncsu.edu
The editors suggest the following Related Resources on Science sites:
In Science Magazine
LETTERS
Craig Franklin, Frank Seebacher, Gordon C. Grigg, Michael Axelsson;, Dale A. Russell, Michael K. Stoskopf, Paul E. Fisher, and Reese E. Barrick (8 September 2000) Science289 (5485), 1687c.
[DOI: 10.1126/science.289.5485.1687c] |Full Text »
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