Beauty or brains? The braincase of Pachyrhinosaurus perotorum and its utility for species-level distinction in the centrosaurine ceratopsid Pachyrhinosaurus
ABSTRACT The centrosaurine ceratopsid taxon Pachyrhinosaurus is the most speciose of centrosaurines, being represented by at least three species ( P. canadensis , P. lakustai , and the recently described P. perotorum ) from the late Campanian and early Maastrichtian of North America. The species are...
Published in: | Earth and Environmental Science Transactions of the Royal Society of Edinburgh |
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Language: | English |
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Cambridge University Press (CUP)
2012
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Online Access: | http://dx.doi.org/10.1017/s1755691013000297 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1755691013000297 |
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crcambridgeupr:10.1017/s1755691013000297 2023-05-15T17:40:15+02:00 Beauty or brains? The braincase of Pachyrhinosaurus perotorum and its utility for species-level distinction in the centrosaurine ceratopsid Pachyrhinosaurus Tykoski, Ronald S. Fiorillo, Anthony R. 2012 http://dx.doi.org/10.1017/s1755691013000297 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1755691013000297 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Earth and Environmental Science Transactions of the Royal Society of Edinburgh volume 103, issue 3-4, page 487-499 ISSN 1755-6910 1755-6929 General Earth and Planetary Sciences General Environmental Science journal-article 2012 crcambridgeupr https://doi.org/10.1017/s1755691013000297 2023-02-24T07:12:11Z ABSTRACT The centrosaurine ceratopsid taxon Pachyrhinosaurus is the most speciose of centrosaurines, being represented by at least three species ( P. canadensis , P. lakustai , and the recently described P. perotorum ) from the late Campanian and early Maastrichtian of North America. The species are readily distinguished from one another by details of easily visible cranio-facial and frill ornamentation, features commonly used to differentiate ceratopsid taxa. Braincase material is also known for all three taxa. We describe the braincase of P. perotorum based on specimens from the Kikak–Tegoseak Quarry of the North Slope of Alaska. We then compare it to braincase and endocranial descriptions of the other Pachyrhinosaurus taxa to test whether there may be useful species-level differences present in these robust parts of the ceratopsid skull. Braincase morphology, including cranial nerve paths through the braincase walls in P. lakustai and P. perotorum , were found to be very similar. Two potential diagnostic differences between taxa were found, although tests based on larger sample sizes will be necessary to verify them. This reinforces the importance of highly visual cranio-facial and frill ornamentation as the best tool for species recognition and phylogenetic reconstruction in ceratopsid dinosaurs. Article in Journal/Newspaper north slope Alaska Cambridge University Press (via Crossref) Earth and Environmental Science Transactions of the Royal Society of Edinburgh 103 3-4 487 499 |
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Open Polar |
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Cambridge University Press (via Crossref) |
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English |
topic |
General Earth and Planetary Sciences General Environmental Science |
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General Earth and Planetary Sciences General Environmental Science Tykoski, Ronald S. Fiorillo, Anthony R. Beauty or brains? The braincase of Pachyrhinosaurus perotorum and its utility for species-level distinction in the centrosaurine ceratopsid Pachyrhinosaurus |
topic_facet |
General Earth and Planetary Sciences General Environmental Science |
description |
ABSTRACT The centrosaurine ceratopsid taxon Pachyrhinosaurus is the most speciose of centrosaurines, being represented by at least three species ( P. canadensis , P. lakustai , and the recently described P. perotorum ) from the late Campanian and early Maastrichtian of North America. The species are readily distinguished from one another by details of easily visible cranio-facial and frill ornamentation, features commonly used to differentiate ceratopsid taxa. Braincase material is also known for all three taxa. We describe the braincase of P. perotorum based on specimens from the Kikak–Tegoseak Quarry of the North Slope of Alaska. We then compare it to braincase and endocranial descriptions of the other Pachyrhinosaurus taxa to test whether there may be useful species-level differences present in these robust parts of the ceratopsid skull. Braincase morphology, including cranial nerve paths through the braincase walls in P. lakustai and P. perotorum , were found to be very similar. Two potential diagnostic differences between taxa were found, although tests based on larger sample sizes will be necessary to verify them. This reinforces the importance of highly visual cranio-facial and frill ornamentation as the best tool for species recognition and phylogenetic reconstruction in ceratopsid dinosaurs. |
format |
Article in Journal/Newspaper |
author |
Tykoski, Ronald S. Fiorillo, Anthony R. |
author_facet |
Tykoski, Ronald S. Fiorillo, Anthony R. |
author_sort |
Tykoski, Ronald S. |
title |
Beauty or brains? The braincase of Pachyrhinosaurus perotorum and its utility for species-level distinction in the centrosaurine ceratopsid Pachyrhinosaurus |
title_short |
Beauty or brains? The braincase of Pachyrhinosaurus perotorum and its utility for species-level distinction in the centrosaurine ceratopsid Pachyrhinosaurus |
title_full |
Beauty or brains? The braincase of Pachyrhinosaurus perotorum and its utility for species-level distinction in the centrosaurine ceratopsid Pachyrhinosaurus |
title_fullStr |
Beauty or brains? The braincase of Pachyrhinosaurus perotorum and its utility for species-level distinction in the centrosaurine ceratopsid Pachyrhinosaurus |
title_full_unstemmed |
Beauty or brains? The braincase of Pachyrhinosaurus perotorum and its utility for species-level distinction in the centrosaurine ceratopsid Pachyrhinosaurus |
title_sort |
beauty or brains? the braincase of pachyrhinosaurus perotorum and its utility for species-level distinction in the centrosaurine ceratopsid pachyrhinosaurus |
publisher |
Cambridge University Press (CUP) |
publishDate |
2012 |
url |
http://dx.doi.org/10.1017/s1755691013000297 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1755691013000297 |
genre |
north slope Alaska |
genre_facet |
north slope Alaska |
op_source |
Earth and Environmental Science Transactions of the Royal Society of Edinburgh volume 103, issue 3-4, page 487-499 ISSN 1755-6910 1755-6929 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s1755691013000297 |
container_title |
Earth and Environmental Science Transactions of the Royal Society of Edinburgh |
container_volume |
103 |
container_issue |
3-4 |
container_start_page |
487 |
op_container_end_page |
499 |
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1766141126619693056 |