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Science 15 May 1998:
Vol. 280. no. 5366, pp. 1048 - 1051
DOI: 10.1126/science.280.5366.1048
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Reports
Predatory Dinosaur Remains from Madagascar: Implications for the Cretaceous Biogeography of Gondwana
Scott D. Sampson,
*
Lawrence M. Witmer,
Catherine A. Forster,
David W. Krause,
Patrick
M. O'Connor,
Peter Dodson,
Florent Ravoavy
Recent discoveries of fossil vertebrates from the Late Cretaceous
of Madagascar include several specimens of a large theropod dinosaur.
One specimen includes a nearly complete and exquisitely preserved skull
with thickened pneumatic nasals, a median frontal horn, and a dorsal
projection on the parietals. The new materials are assigned to the
enigmatic theropod group Abelisauridae on the basis of a number of
unique features. Fossil remains attributable to abelisaurids are
restricted to three Gondwanan landmasses: South America, Madagascar,
and the Indian subcontinent. This distribution is consistent with a
revised paleogeographic reconstruction that posits prolonged links
between these landmasses (via Antarctica), perhaps until late in the
Late Cretaceous.
S. D. Sampson, Department of Anatomy, New York College of
Osteopathic Medicine of New York Institute of Technology, Old Westbury,
NY 11568, USA.
L. M. Witmer, Department of Biomedical Sciences, College of
Osteopathic Medicine, Ohio University, Athens, OH 45701, USA.
C. A. Forster, D. W. Krause, P. M. O'Connor, Department
of Anatomical Sciences, State University of New York, Stony Brook, NY
11794, USA.
P. Dodson, Laboratories of Anatomy, Department of Animal Biology,
School of Veterinary Medicine, University of Pennsylvania,
Philadelphia, PA 19104, USA.
F. Ravoavy, Université d'Antananarivo, Service de
Paléontologie, Antananarivo (101), Madagascar.
*
To whom correspondence should be addressed: E-mail:
ssampson{at}iris.nyit.edu
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