Data from: Ontogeny and evolution of the elasmosaurid neck highlight a greater diversity of Antarctic plesiosaurians
The Antarctic plesiosaurian record is critical for understanding the evolution of elasmosaurids in the southern hemisphere. Elasmosaurids exhibit some of the most remarkable modifications of the vertebrate axial skeleton given their extreme elongation of the cervical region. Despite a considerable a...
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ftzenodo:oai:zenodo.org:6407541 2024-09-15T17:48:36+00:00 Data from: Ontogeny and evolution of the elasmosaurid neck highlight a greater diversity of Antarctic plesiosaurians Brum, Arthur S. Simões, Tiago R. Souza, Geovane A. Pinheiro, André E. P. Figueiredo, Rodrigo G. Caldwell, Michael W. Sayão, Juliana M. Kellner, Alexander W. A. 2022-04-19 https://doi.org/10.5061/dryad.xpnvx0kff unknown Zenodo https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.xpnvx0kff oai:zenodo.org:6407541 info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode Plesiosauria Linear morphometry Snow Hill Island Formation Antarctica mophometrics info:eu-repo/semantics/other 2022 ftzenodo https://doi.org/10.5061/dryad.xpnvx0kff 2024-07-26T03:41:50Z The Antarctic plesiosaurian record is critical for understanding the evolution of elasmosaurids in the southern hemisphere. Elasmosaurids exhibit some of the most remarkable modifications of the vertebrate axial skeleton given their extreme elongation of the cervical region. Despite a considerable amount of information available on vertebral counts within Plesiosauria throughout the decades, we have a considerably more limited understanding of the diversity of cervical vertebral shapes in elasmosaurids and how these have changed throughout ontogeny and phylogeny. Here, we compile the largest known morphometric dataset on elasmosaurid cervical vertebrae, including data on juveniles and adults, to answer some of those long-standing questions. This dataset also includes newly recovered materials from Antarctica, which we describe herein. Using multivariate statistical approaches, we find that the two major elasmosaurid cervical morphotypes, the elasmosaurine anteroposteriorly elongate (can-shaped) and the aristonectine anteroposteriorly short and dorsoventrally tall (disk-like), evolved towards opposite regions of the morphospace from the plesiomorphic ' Cimoliasaurus '-grade condition. We also find a marked ontogenetic shift from the disk-like to can-shaped morphologies, which is especially pronounced in elasmosaurines, but more limited in aristonectines. Furthermore, we find that juvenile aristonectines occupy a specific region of the vertebral morphospace, distinct from any other group or ontogenetic stage, thus suggesting that reversal to the 'short-necked' condition in elasmosaurids is mostly characterized by ontogenetic predisplacement in aristonectines. Finally, we find that it is possible to discriminate between vertebral shapes of distinct taxonomic groups regardless of ontogenetic stage, which suggests a greater diversity of Antarctic elasmosaurids than previously recognized. Funding provided by: Programa Antártico Brasileiro - Conselho Nacional de Desenvolvimento Científico e Tecnológico* Crossref ... Other/Unknown Material Antarc* Antarctic Antarctica Snow Hill Island Zenodo |
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ftzenodo |
language |
unknown |
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Plesiosauria Linear morphometry Snow Hill Island Formation Antarctica mophometrics |
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Plesiosauria Linear morphometry Snow Hill Island Formation Antarctica mophometrics Brum, Arthur S. Simões, Tiago R. Souza, Geovane A. Pinheiro, André E. P. Figueiredo, Rodrigo G. Caldwell, Michael W. Sayão, Juliana M. Kellner, Alexander W. A. Data from: Ontogeny and evolution of the elasmosaurid neck highlight a greater diversity of Antarctic plesiosaurians |
topic_facet |
Plesiosauria Linear morphometry Snow Hill Island Formation Antarctica mophometrics |
description |
The Antarctic plesiosaurian record is critical for understanding the evolution of elasmosaurids in the southern hemisphere. Elasmosaurids exhibit some of the most remarkable modifications of the vertebrate axial skeleton given their extreme elongation of the cervical region. Despite a considerable amount of information available on vertebral counts within Plesiosauria throughout the decades, we have a considerably more limited understanding of the diversity of cervical vertebral shapes in elasmosaurids and how these have changed throughout ontogeny and phylogeny. Here, we compile the largest known morphometric dataset on elasmosaurid cervical vertebrae, including data on juveniles and adults, to answer some of those long-standing questions. This dataset also includes newly recovered materials from Antarctica, which we describe herein. Using multivariate statistical approaches, we find that the two major elasmosaurid cervical morphotypes, the elasmosaurine anteroposteriorly elongate (can-shaped) and the aristonectine anteroposteriorly short and dorsoventrally tall (disk-like), evolved towards opposite regions of the morphospace from the plesiomorphic ' Cimoliasaurus '-grade condition. We also find a marked ontogenetic shift from the disk-like to can-shaped morphologies, which is especially pronounced in elasmosaurines, but more limited in aristonectines. Furthermore, we find that juvenile aristonectines occupy a specific region of the vertebral morphospace, distinct from any other group or ontogenetic stage, thus suggesting that reversal to the 'short-necked' condition in elasmosaurids is mostly characterized by ontogenetic predisplacement in aristonectines. Finally, we find that it is possible to discriminate between vertebral shapes of distinct taxonomic groups regardless of ontogenetic stage, which suggests a greater diversity of Antarctic elasmosaurids than previously recognized. Funding provided by: Programa Antártico Brasileiro - Conselho Nacional de Desenvolvimento Científico e Tecnológico* Crossref ... |
format |
Other/Unknown Material |
author |
Brum, Arthur S. Simões, Tiago R. Souza, Geovane A. Pinheiro, André E. P. Figueiredo, Rodrigo G. Caldwell, Michael W. Sayão, Juliana M. Kellner, Alexander W. A. |
author_facet |
Brum, Arthur S. Simões, Tiago R. Souza, Geovane A. Pinheiro, André E. P. Figueiredo, Rodrigo G. Caldwell, Michael W. Sayão, Juliana M. Kellner, Alexander W. A. |
author_sort |
Brum, Arthur S. |
title |
Data from: Ontogeny and evolution of the elasmosaurid neck highlight a greater diversity of Antarctic plesiosaurians |
title_short |
Data from: Ontogeny and evolution of the elasmosaurid neck highlight a greater diversity of Antarctic plesiosaurians |
title_full |
Data from: Ontogeny and evolution of the elasmosaurid neck highlight a greater diversity of Antarctic plesiosaurians |
title_fullStr |
Data from: Ontogeny and evolution of the elasmosaurid neck highlight a greater diversity of Antarctic plesiosaurians |
title_full_unstemmed |
Data from: Ontogeny and evolution of the elasmosaurid neck highlight a greater diversity of Antarctic plesiosaurians |
title_sort |
data from: ontogeny and evolution of the elasmosaurid neck highlight a greater diversity of antarctic plesiosaurians |
publisher |
Zenodo |
publishDate |
2022 |
url |
https://doi.org/10.5061/dryad.xpnvx0kff |
genre |
Antarc* Antarctic Antarctica Snow Hill Island |
genre_facet |
Antarc* Antarctic Antarctica Snow Hill Island |
op_relation |
https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.xpnvx0kff oai:zenodo.org:6407541 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.xpnvx0kff |
_version_ |
1810290026148265984 |