The phylogenetic position of the Tyrannosauridae: implications for theropod systematics

@article{Holtz1994ThePP,
  title={The phylogenetic position of the Tyrannosauridae: implications for theropod systematics},
  author={Thomas Richard Holtz},
  journal={Journal of Paleontology},
  year={1994},
  volume={68},
  pages={1100 - 1117}
}
  • T. Holtz
  • Published 1 September 1994
  • Environmental Science, Geography
  • Journal of Paleontology
Tyrannosaurids are a well-supported clade of very large predatory dinosaurs of Late Cretaceous Asiamerica. Traditional dinosaurian systematics place these animals within the infraorder Carnosauria with the other large theropods (allosaurids, megalosaurids). A new cladistic analysis indicates that the tyrannosaurs were in fact derived members of the Coelurosauria, a group of otherwise small theropods. Despite certain gross cranial similarities with the large predators of the Jurassic and Early… 

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References

SHOWING 1-10 OF 180 REFERENCES

Ostrich Dinosaurs from the Late Cretaceous of Western Canada

The family Ornithomimidae is defined on the basis of the skeletal morphology of the three genera Ornithomimus, Struthiomimus, and Dromiceiomimus known in continental strata in Alberta, which are

A new species of the theropod dinosaur Syntarsus from the Early Jurassic Kayenta Formation of Arizona

The discovery of Syntarsus in North America adds significantly to the increasingly detailed resemblance of African and North American Early Jurassic terrestrial vertebrate faunas.

The Gondwanian theropod families Abelisauridae and Noasauridae

The theropod families Abelisauridae and Noasauridae appear closely related because of shared derived characters such as the short anterior area of the maxilla, the small or absent preantorbital

A redescription and revised diagnosis of the syntypes of the Mongolian tyrannosaur Alectrosaurus olseni

The two syntypes of Alectrosaurus olseni Gilmore, 1933, are redescribed and found to belong to two theropod families and one syntype was correctly diagnosed by Gilmore as a tyrannosaur and is recognized here as the lectotype of the species.

Cranial anatomy of Stenonychosaurus inequalis (Saurischia, Theropoda) and its bearing on the origin of birds

The middle ear cavity is well defined and is connected to at least two systems of sinuses in the skull bones, which strengthen the claim that small carnivorous dinosaurs are more plausible bird ancestors than either pseudosuchians or crocodiles.

XIV .-TYRANNOSAURUS AND OTHER CRETACEOUS CARNIVOROUS DINOSAURS

In I902, the American Museum expedition in Montana, led by Mr. Barnum Brown, and accompanied by Professor R. S. Lull, secured considerable portions of the skeleton of one of the great Carnivorous

The arctometatarsalian pes, an unusual structure of the metatarsus of Cretaceous Theropoda (Dinosauria: Saurischia)

  • T. Holtz
  • Biology, Environmental Science
  • 1995
Morphometric analysis indicates that the arctometatarsalian structure is significantly more elongate and gracile than underived metatarsi, and this structure is associated with relatively elongate distal hind limbs per unit femoral length.

Postosuchus, a New Thecodontian Reptile from the Triassic of Texas and the Origin of Tyrannosaurs

Although Postosuchus exhibits many carnosaurian traits, its ankle joint is of \`crocodile-normal' pattern, which suggests its pseudosuchian affinity, and Tyrannosaurs probably evolved from poposaurids, as indicated by the correlation between skull, pelvis and ankle structure.

Primitive dinosaur skeleton from Argentina and the early evolution of Dinosauria

The discovery of Eoraptor supports the hypothesis that dinosaurs diverged rapidly at small body size from a common ancestor, with the principal herbivorous and carnivorous lineages present by the middle Carnian.

Principal characters of American Jurassic dinosaurs; Part VIII, The order Theropoda

THE carnivorous ])inosauria form a well marked order, which the writer has called the Theropoda, in his classification of this group.* Although much has beeu written' about these reptiles since
...