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Title: Cranial anatomy and variation in Prosaurolophus maximus (Dinosauria: Hadrosauridae)
Contributor(s): McGarrity, Christopher T (author); Campione, Nicolas E  (author)orcid ; Evans, David C (author)
Publication Date: 2013-04
Early Online Version: 2013-03-27
Open Access: Yes
DOI: 10.1111/zoj.12009Open Access Link
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Abstract: Prosaurolophus maximus Brown is a saurolophine hadrosaurid known from numerous complete, articulated skulls from the Dinosaur Park Formation (Campanian, Alberta, Canada) that range in size by approximately half a metre in total skull length. Therefore, it is an important taxon for understanding patterns of growth and variation in saurolophines. This study describes the cranial anatomy of P. maximus from the type locality of Dinosaur Provincial Park (Dinosaur Park Formation: Campanian) on the basis of ten articulated skulls, quantitatively examines its range of osteological variation, and provides the first hypothesized ontogenetic series for this taxon. A second species, Prosaurolophus blackfeetensis Horner, was named on the basis of geologically younger material from Montana (Two Medicine Formation: Campanian) that is diagnosed by putative morphological differences in the nasal crest. However, considerable nasal crest variation in the sample from the Dinosaur Park Formation does not permit quantitative differentiation of P. blackfeetensis from P. maximus. Furthermore, a species-level phylogenetic analysis of saurolophines that includes both P. maximus and P. blackfeetensis as originally defined recovers them as sister taxa that do not differ morphologically in the character matrix. Based on both the morphometric and phylogenetic data, this study supports the hypothesis that P. blackfeetensis is a junior synonym of P. maximus, thereby substantially increasing its temporal range to 1.6 million years, and a concomitant period of morphological stasis in this taxon.
Publication Type: Journal Article
Source of Publication: Zoological Journal of the Linnean Society, 167(4), p. 531-568
Publisher: Wiley-Blackwell Publishing Ltd
Place of Publication: United Kingdom
ISSN: 0024-4082
Field of Research (FOR): 040308 Palaeontology (incl. Palynology)
060301 Animal Systematics and Taxonomy
060309 Phylogeny and Comparative Analysis
Socio-Economic Objective (SEO): 970104 Expanding Knowledge in the Earth Sciences
970106 Expanding Knowledge in the Biological Sciences
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Journal Article
School of Environmental and Rural Science

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