The Giant Crocodyliform Sarcosuchus from the Cretaceous of Africa

Author:

Sereno Paul C.1,Larsson Hans C. E.2,Sidor Christian A.3,Gado Boubé4

Affiliation:

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

2. Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT 06511, USA.

3. Department of Anatomy, New York College of Osteopathic Medicine, Old Westbury, NY 11568, USA.

4. Institut de Recherches en Sciences Humaines, Niamey, Niger Republic.

Abstract

New fossils of the giant African crocodyliform Sarcosuchus imperator clarify its skeletal anatomy, growth patterns, size, longevity, and phylogenetic position. The skull has an expansive narial bulla and elongate jaws studded with stout, smooth crowns that do not interlock. The jaw form suggests a generalized diet of large vertebrates, including fish and dinosaurs. S. imperator is estimated to have grown to a maximum body length of at least 11 to 12 meters and body weight of about 8 metric tons over a life-span of 50 to 60 years. Unlike its closest relatives, which lived as specialized piscivores in marginal marine habitats, S. imperator thrived in fluvial environments.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference34 articles.

1. Broin F., Taquet P., C. R. Acad. Sci. Paris 262, 2326 (1966).

2. Taquet P., Cah. Paléontol. 1, 1 (1975).

3. Sarcosuchus imperator revised diagnosis (conditions unknown in S. hartti ): crocodyliform with premaxillary narial bulla maxillae that expand about 25% in width anteriorly anterior maxillary teeth reduced in size. Sarcosuchus revised diagnosis ( S. imperator S. hartti ): crocodyliforms with dentary teeth 3 and 4 enlarged (28); diastema between dentary tooth 4 and 5; dentaries with fan-shaped distal expansion (28) reaching a width 50% greater than the narrowest portion of the rami; dentary symphysis extending posteriorly to about dentary tooth 20.

4. A. C. Pooley in Crocodiles and Alligators C. A. Ross Ed. (Merehurst London 1989) pp. 76–91.

5. Sunosuchus junggarensis sp.nov. (Archosauria: Crocodyliformes) from the Upper Jurassic of Xinjiang, People's Republic of China

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