A Re-evaluation of the Chasmosaurine Ceratopsid Chasmosaurus (Dinosauria: Ornithischia) from the Upper Cretaceous (Campanian) Dinosaur Park Formation of Western Canada
Public Deposited- Resource Type
- Creator
- Abstract
The chasmosaurine ceratopsid Chasmosaurus is known from the Upper Cretaceous Dinosaur Park Formation (DPF) of southern Alberta and Saskatchewan. The two species, Chasmosaurus belli and Chasmosaurus russelli, are distinguished by differences in cranial ornamentation, and their purported stratigraphic segregation in the DPF, with C. russelli replaced by C. belli over time. In the DPF, Chasmosaurus is replaced by a third chasmosaurine, Vagaceratops irvinensis. The results of the analyses conducted indicate that 1, C. belli and C. russelli lack phylogenetic, stratigraphic or ontogenetic separation, but can be distinguished by the relative embayment of their posterior frill margin; 2, Vagaceratops is the sister taxon to Chasmosaurus; 3, the Chasmosaurus specimens AMNH 5402 and YPM 2016 are referable to Vagaceratops, and may represent directed morphological change over time; 4, no stratigraphic separation exists between Chasmosaurus and Vagaceratops. C. belli and C. russelli are considered to be synonymous, with C. belli having taxonomic priority.
- Subject
- Language
- Publisher
- Thesis Degree Level
- Thesis Degree Name
- Thesis Degree Discipline
- Identifier
- Rights Notes
Copyright © 2014 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. No part may be used for commercial purposes directly or indirectly via a for-profit platform; no adaptation or derivative works are permitted without consent from the copyright owner.
- Date Created
- 2014
Relations
- In Collection:
Items
Thumbnail | Title | Date Uploaded | Visibility | Actions |
---|---|---|---|---|
campbell-areevaluationofthechasmosaurineceratopsid.pdf | 2023-05-04 | Public | Download |