Re‐description of the early Triassic diapsid Palacrodon from the lower Fremouw formation of Antarctica
Abstract The rapid radiation and dispersal of crown reptiles following the end‐Permian mass extinction characterizes the earliest phase of the Mesozoic. Phylogenetically, this early radiation is difficult to interpret, with polytomies near the crown node, long ghost lineages, and enigmatic origins f...
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crwiley:10.1111/joa.13770 2024-09-15T17:47:19+00:00 Re‐description of the early Triassic diapsid Palacrodon from the lower Fremouw formation of Antarctica Jenkins, Kelsey M. Meyer, Dalton L. Lewis, Patrick J. Choiniere, Jonah N. Bhullar, Bhart‐Anjan S. Sigma Xi National Science Foundation of Sri Lanka 2022 http://dx.doi.org/10.1111/joa.13770 https://onlinelibrary.wiley.com/doi/pdf/10.1111/joa.13770 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/joa.13770 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Anatomy volume 241, issue 6, page 1441-1458 ISSN 0021-8782 1469-7580 journal-article 2022 crwiley https://doi.org/10.1111/joa.13770 2024-08-01T04:23:16Z Abstract The rapid radiation and dispersal of crown reptiles following the end‐Permian mass extinction characterizes the earliest phase of the Mesozoic. Phylogenetically, this early radiation is difficult to interpret, with polytomies near the crown node, long ghost lineages, and enigmatic origins for crown group clades. Better understanding of poorly known taxa from this time can aid in our understanding of this radiation and Permo‐Triassic ecology. Here, we describe an Early Triassic specimen of the diapsid Palacrodon from the Fremouw Formation of Antarctica. While Palacrodon is known throughout the Triassic and exhibits a cosmopolitan geographic range, little is known of its evolutionary relationships. We recover Palacrodon outside of crown reptiles (Sauria) but more crownward than Youngina capensis and other late Permian diapsids. Furthermore, Palacrodon possesses anatomical features that add clarity to the evolution of the stapes within the reptilian lineage, as well as incipient adaptations for arboreality and herbivory during the earliest phases of the Permo–Triassic recovery. Article in Journal/Newspaper Antarc* Antarctica Wiley Online Library Journal of Anatomy 241 6 1441 1458 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract The rapid radiation and dispersal of crown reptiles following the end‐Permian mass extinction characterizes the earliest phase of the Mesozoic. Phylogenetically, this early radiation is difficult to interpret, with polytomies near the crown node, long ghost lineages, and enigmatic origins for crown group clades. Better understanding of poorly known taxa from this time can aid in our understanding of this radiation and Permo‐Triassic ecology. Here, we describe an Early Triassic specimen of the diapsid Palacrodon from the Fremouw Formation of Antarctica. While Palacrodon is known throughout the Triassic and exhibits a cosmopolitan geographic range, little is known of its evolutionary relationships. We recover Palacrodon outside of crown reptiles (Sauria) but more crownward than Youngina capensis and other late Permian diapsids. Furthermore, Palacrodon possesses anatomical features that add clarity to the evolution of the stapes within the reptilian lineage, as well as incipient adaptations for arboreality and herbivory during the earliest phases of the Permo–Triassic recovery. |
author2 |
Sigma Xi National Science Foundation of Sri Lanka |
format |
Article in Journal/Newspaper |
author |
Jenkins, Kelsey M. Meyer, Dalton L. Lewis, Patrick J. Choiniere, Jonah N. Bhullar, Bhart‐Anjan S. |
spellingShingle |
Jenkins, Kelsey M. Meyer, Dalton L. Lewis, Patrick J. Choiniere, Jonah N. Bhullar, Bhart‐Anjan S. Re‐description of the early Triassic diapsid Palacrodon from the lower Fremouw formation of Antarctica |
author_facet |
Jenkins, Kelsey M. Meyer, Dalton L. Lewis, Patrick J. Choiniere, Jonah N. Bhullar, Bhart‐Anjan S. |
author_sort |
Jenkins, Kelsey M. |
title |
Re‐description of the early Triassic diapsid Palacrodon from the lower Fremouw formation of Antarctica |
title_short |
Re‐description of the early Triassic diapsid Palacrodon from the lower Fremouw formation of Antarctica |
title_full |
Re‐description of the early Triassic diapsid Palacrodon from the lower Fremouw formation of Antarctica |
title_fullStr |
Re‐description of the early Triassic diapsid Palacrodon from the lower Fremouw formation of Antarctica |
title_full_unstemmed |
Re‐description of the early Triassic diapsid Palacrodon from the lower Fremouw formation of Antarctica |
title_sort |
re‐description of the early triassic diapsid palacrodon from the lower fremouw formation of antarctica |
publisher |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1111/joa.13770 https://onlinelibrary.wiley.com/doi/pdf/10.1111/joa.13770 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/joa.13770 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Journal of Anatomy volume 241, issue 6, page 1441-1458 ISSN 0021-8782 1469-7580 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/joa.13770 |
container_title |
Journal of Anatomy |
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241 |
container_issue |
6 |
container_start_page |
1441 |
op_container_end_page |
1458 |
_version_ |
1810496416460570624 |