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Ancestral body plan and adaptive radiation of sauropterygian marine reptiles
Sauropterygia is the most diversified and dominant clade among marine reptiles, but their early evolution is scarcely understood. Here we report the earliest known complete specimen related to sauropterygians from the Early Triassic. It is referred to Hanosaurus hupehensis by an exclusive combinatio...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9722468/ https://www.ncbi.nlm.nih.gov/pubmed/36483013 http://dx.doi.org/10.1016/j.isci.2022.105635 |
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author | Wang, Wei Shang, Qinghua Cheng, Long Wu, Xiao-Chun Li, Chun |
author_facet | Wang, Wei Shang, Qinghua Cheng, Long Wu, Xiao-Chun Li, Chun |
author_sort | Wang, Wei |
collection | PubMed |
description | Sauropterygia is the most diversified and dominant clade among marine reptiles, but their early evolution is scarcely understood. Here we report the earliest known complete specimen related to sauropterygians from the Early Triassic. It is referred to Hanosaurus hupehensis by an exclusive combination of features and shows mosaic morphology integrating the characters of multiple sauropterygian sub-lineages. In phylogenetic results from both parsimony and Bayesian analyses employing our reconstructed dataset, Hanosaurus is stably resolved as the basal-most member of Sauropterygiformes, a clade comprising all sauropterygians and saurosphargids. This skeleton reveals an unexpected ancestral body plan for sauropterygiforms with an elongate trunk and four short limbs, differing from many of its immediate descendants but more similar to non-sauropterygiform marine reptiles at their early aquatic stage as axial swimmers. After this convergence on body plan, we quantitatively confirm the rapid divergence of sauropterygiform reptiles following the end-Permian mass extinction. |
format | Online Article Text |
id | pubmed-9722468 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
spelling | pubmed-97224682022-12-07 Ancestral body plan and adaptive radiation of sauropterygian marine reptiles Wang, Wei Shang, Qinghua Cheng, Long Wu, Xiao-Chun Li, Chun iScience Article Sauropterygia is the most diversified and dominant clade among marine reptiles, but their early evolution is scarcely understood. Here we report the earliest known complete specimen related to sauropterygians from the Early Triassic. It is referred to Hanosaurus hupehensis by an exclusive combination of features and shows mosaic morphology integrating the characters of multiple sauropterygian sub-lineages. In phylogenetic results from both parsimony and Bayesian analyses employing our reconstructed dataset, Hanosaurus is stably resolved as the basal-most member of Sauropterygiformes, a clade comprising all sauropterygians and saurosphargids. This skeleton reveals an unexpected ancestral body plan for sauropterygiforms with an elongate trunk and four short limbs, differing from many of its immediate descendants but more similar to non-sauropterygiform marine reptiles at their early aquatic stage as axial swimmers. After this convergence on body plan, we quantitatively confirm the rapid divergence of sauropterygiform reptiles following the end-Permian mass extinction. Elsevier 2022-11-18 /pmc/articles/PMC9722468/ /pubmed/36483013 http://dx.doi.org/10.1016/j.isci.2022.105635 Text en © 2022 The Author(s) https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Article Wang, Wei Shang, Qinghua Cheng, Long Wu, Xiao-Chun Li, Chun Ancestral body plan and adaptive radiation of sauropterygian marine reptiles |
title | Ancestral body plan and adaptive radiation of sauropterygian marine reptiles |
title_full | Ancestral body plan and adaptive radiation of sauropterygian marine reptiles |
title_fullStr | Ancestral body plan and adaptive radiation of sauropterygian marine reptiles |
title_full_unstemmed | Ancestral body plan and adaptive radiation of sauropterygian marine reptiles |
title_short | Ancestral body plan and adaptive radiation of sauropterygian marine reptiles |
title_sort | ancestral body plan and adaptive radiation of sauropterygian marine reptiles |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9722468/ https://www.ncbi.nlm.nih.gov/pubmed/36483013 http://dx.doi.org/10.1016/j.isci.2022.105635 |
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