Hostname: page-component-cd9895bd7-8ctnn Total loading time: 0 Render date: 2024-12-26T04:04:01.983Z Has data issue: false hasContentIssue false
  • English
  • Français

Notes on pachycephalosaurs (Ornithischia)

Published online by Cambridge University Press:  19 May 2016

Emily B. Giffin
Emily B. Giffin*
Affiliation:
Department of Geosciences, University of Wisconsin-Milwaukee, Milwaukee 53201
Get access Rights & Permissions [Opens in a new window]

Abstract

Previously undescribed specimens of Pachycephalosaurus wyomingensis allow partial description of the anterior braincase and a preliminary examination of change of dome shape with age. The two morphs of dome shape recognized in adults are also present in juvenile specimens with dome lengths half that of mature adults. A new specimen of Stegoceras edmontonense in the same geographic and stratigraphic provenance as P. wyomingensis establishes that the two pachycephalosaur genera could exist sympatrically.

Type
Research Article
Information
Journal of Paleontology , Volume 63 , Issue 4 , July 1989 , pp. 525 - 529
Copyright
Copyright © The Paleontological Society 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Brown, B., and Schlaijker, E. M. 1943. A study of the troodont dinosaurs with the description of a new genus and four new species. Bulletin of the American Museum of Natural History, 82(5):120–149.Google Scholar
Chapman, R. E., Galton, P. M., and Sepkoski, J. J. Jr. 1981. A morphometric study of the cranium of the pachycephalosaurid dinosaur Stegoceras. Journal of Paleontology, 55:608–618.Google Scholar
Galton, P. 1971. A primitive dome-headed dinosaur (Ornithischia: Pachycephalosauridae) from the Lower Cretaceous of England and the function of the dome of pachycephaloaurids. Journal of Paleontology, 45:40–47.Google Scholar
Galton, P., and Sues, H.-D. 1983. New data on pachycephalosaurid dinosaurs (Reptilia: Ornithischia) from North America. Canadian Journal of Earth Science, 20:462–472.Google Scholar
Giffin, E. B. 1989. Pachycephalosaur paleoneurology. Journal of Vertebrate Paleontology, 9:67–77.Google Scholar
Giffin, E. B., Gabriel, D. L., and Johnson, R. E. 1987. A new pachycephalosaurid skull from the Cretaceous Hell Creek Formation of Montana. Journal of Vertebrate Paleontology, 7:398–407.Google Scholar
Gilmore, C. W. 1924. On Troodon validus; an orthopodous dinosaur from the Belly River Cretaceous of Alberta, Canada. Bulletin of the University of Alberta, Department of Geology, 1:1–43.Google Scholar
Gilmore, C. W. 1931. A new species of troodont dinosaur from the Lance Formation of Wyoming. Proceedings of the U. S. National Museum, 79(9):1–6.Google Scholar
Gilmore, C. W. 1936. Remarks on a skull cap of the genus Troodon. Annals of the Carnegie Museum, 25:109–112.CrossRefGoogle Scholar
Lambe, L. M. 1918. The Cretaceous genus Stegoceras, typifying a new family referred provisionally to the Stegosauria. Transactions of the Royal Society of Canada, 12(4):23–36.Google Scholar
Leidy, J. 1873. Contributions to the extinct fauna of the Western Territories. U. S. Geological Survey of the Territories, Report 1, 358 p.Google Scholar
Maryańska, T., and Osmólska, H. 1974. Pachycephalosauria, a new suborder of ornithischian dinosaurs. Palaeontologia polonica, 30:45–102.Google Scholar
Sues, H.-D., and Galton, P. 1987. Anatomy and classification of the North American Pachycephalosauria (Dinosauria: Ornithischia). Palaeontographica (A), 198:1–40.Google Scholar