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Sinosaurus from southwestern China Open Access


Other title
Type of item
Degree grantor
University of Alberta
Author or creator
Xing, Lida
Supervisor and department
Currie, Philip J. (Biological Sciences)
Examining committee member and department
Murray, Alison (Biological Sciences)
Gingras, Murray (Earth and Atmospheric Sciences)
Department of Biological Sciences
Systematics and Evolution
Date accepted
Graduation date
Master of Science
Degree level
Early Jurassic Sinosaurus triassicus (=“Dilophosaurus sinensis”) is the earliest large dinosaur predator from China; however, all the specimens of this species have remained poorly know. The Hewanzi specimen described in this thesis is the only well prepared one. Morphology of the crest and braincase of the Hewanzi specimen indicates that it possesses advanced characteristics that are more developed than in Dilophosaurus. A phylogenetic analysis shows Sinosaurus and Cryolophosaurus emerge as more derived theropods; they were recovered as more closely related to Averostra than to Coelophysis and Dilophosaurus. These results may suggest the Hewanzi specimen represents another species of Sinosaurus. A finite element analysis (FEA) suggests the structural features of the crest in Dilophosaurus and Sinosaurus cannot play a mechanical role during combat. In addition, a remodeled alveolus in the maxilla of Sinosaurus is the first confirmed example of dental pathology in a dinosaur.
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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