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Skull structure and evolution in tyrannosaurid dinosaurs Open Access

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Author or creator
Currie, P. J.
Hurum, J. H.
Sabath, K.
Additional contributors
Subject/Keyword
Theropoda
Phylogeny
Dinosauria
Coelurosauria
Parsimonious Analysis
Tyrannosauridae
Type of item
Journal Article (Published)
Language
English
Place
Time
Description
Tyrannosauridae can be subdivided into two distinct subfamilies-the Albertosaurinae and the Tyrannosaurinae. Previously recognized subdivisions Aublysodontinae and Shanshanosaurinae are rejected because they are based on insufficient material and juvenile specimens. Our results are based upon a phylogenetic analysis using PAUP program (Swofford 1999) of 77 skull characters and seven genera (Albertosaurus, Alioramus, Daspletosaurus, Gorgosaurus, Nanotyrannus, Tarbosaurus, and Tyrannosaurus); with Allosaurus as outgroup. Of the 77 characters used, more than half were parsimony informative. A single most parsimonious tree was obtained with the Tree Length being 88. The analysis of cranial characters and comparison of postcranial features reveal that Tarbosaurus bataar is not the sister taxon of Tyrannosaurus rex (contra Holtz 2001). Their similarities are partially due to the fact that both are extremely large animals. Thus, Tarbosaurus should be considered a genus distinct from Tyrannosaurus.
Date created
2003
DOI
doi:10.7939/R31Z41S6Z
License information
Rights
© 2003 Polish Academy of Sciences, Institue of Paleobiology. This version of this article is open access and can be downloaded and shared. The original author(s) and source must be cited.
Citation for previous publication
Currie, P. J., Hurum, J. H., & Sabath, K. (2003). Skull structure and evolution in tyrannosaurid dinosaurs. Acta Palaeontologica Polonica, 48, 227-234.
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File title: Skull structure and evolution in tyrannosaurid dinosaurs
File author: Currie, P.J., Hurum, J.H., and Sabath, K.
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