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The phylogenetic position of the Tyrannosauridae: implications for theropod systematics

Journal of Paleontology

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Abstract

A new cladistic analysis indicates that the tyrannosaurs were derived members of the Coelurosauria, a group of otherwise small theropods. Desipte certain gross cranial similarities with the large predators of the Jurassic and Early Cretaceous, the Late Cretaceous tyrannosaurids are shown to be the sister group to ornithominids and troodontids, which share a derived condition of the metatarsus. The taxa "Carnosauria' and "Deinonychosauria' are shown to be polyphyletic, and the Late Jurassic African form Elaphrosaurus is found to be the sister taxon to Abelisauridae. Purported allosaurid-tyrannosaurid synapomorphies are seen to be largely size-related. The remaining giant tetanurine theropods were found to be progressive distant outgroups to an allosaurid-coelurosaur clade. -from Author

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
The phylogenetic position of the Tyrannosauridae: implications for theropod systematics
Series title:
Journal of Paleontology
Volume
68
Issue:
5
Year Published:
1994
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Journal of Paleontology
First page:
1100
Last page:
1117