Reassessment of the Early Triassic trematosaurid temnospondyl Tertrema acuta from the Arctic island of Spitsbergen
Trematosaurids were globally distributed Early Triassic temnospondyl amphibians characterized by elongate ‘crocodile-like’ skulls. Some of the most famous trematosaurid fossils were discovered on the island of Spitsbergen in the Arctic Svalbard archipelago. Among these, the short-snouted trematosaur...
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Taylor & Francis
2021
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ftdatacite:10.6084/m9.figshare.14511015 2023-05-15T14:57:11+02:00 Reassessment of the Early Triassic trematosaurid temnospondyl Tertrema acuta from the Arctic island of Spitsbergen Slodownik, Miriam A. Mörs, Thomas Kear, Benjamin P. 2021 https://dx.doi.org/10.6084/m9.figshare.14511015 https://tandf.figshare.com/articles/dataset/Reassessment_of_the_Early_Triassic_trematosaurid_temnospondyl_i_Tertrema_acuta_i_from_the_Arctic_island_of_Spitsbergen/14511015 unknown Taylor & Francis https://dx.doi.org/10.1080/02724634.2021.1900209 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Sociology FOS Sociology 69999 Biological Sciences not elsewhere classified dataset Dataset 2021 ftdatacite https://doi.org/10.6084/m9.figshare.14511015 https://doi.org/10.1080/02724634.2021.1900209 2021-11-05T12:55:41Z Trematosaurids were globally distributed Early Triassic temnospondyl amphibians characterized by elongate ‘crocodile-like’ skulls. Some of the most famous trematosaurid fossils were discovered on the island of Spitsbergen in the Arctic Svalbard archipelago. Among these, the short-snouted trematosaurine, Tertrema acuta , is one of the few taxa represented by virtually complete cranial remains. Unusually, however, the type specimens comprise only natural molds that were historically used to reconstruct three-dimensional casts. Here, we re-assess these restorations using the original impressions to phylogenetically analyze and re-diagnose the taxon. Unexpectedly, our first-hand scores differ markedly from previous literature-sourced interpretations and yield conflicting tree topologies that nest T. acuta with long-snouted lonchorhynchines, thus destabilizing the long-favored sub-division of trematosaurids based on their skull shape. We attribute this result to character state conflict and suggest that the traditional classification of trematosaurids may mask more complex evolutionary relationships, as well as possible trophic partitioning, and eco-morphological plasticity. Dataset Arctic Svalbard Spitsbergen DataCite Metadata Store (German National Library of Science and Technology) Arctic Svalbard Svalbard Archipelago Arctic Island ENVELOPE(-74.766,-74.766,62.234,62.234) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Sociology FOS Sociology 69999 Biological Sciences not elsewhere classified |
spellingShingle |
Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Sociology FOS Sociology 69999 Biological Sciences not elsewhere classified Slodownik, Miriam A. Mörs, Thomas Kear, Benjamin P. Reassessment of the Early Triassic trematosaurid temnospondyl Tertrema acuta from the Arctic island of Spitsbergen |
topic_facet |
Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Sociology FOS Sociology 69999 Biological Sciences not elsewhere classified |
description |
Trematosaurids were globally distributed Early Triassic temnospondyl amphibians characterized by elongate ‘crocodile-like’ skulls. Some of the most famous trematosaurid fossils were discovered on the island of Spitsbergen in the Arctic Svalbard archipelago. Among these, the short-snouted trematosaurine, Tertrema acuta , is one of the few taxa represented by virtually complete cranial remains. Unusually, however, the type specimens comprise only natural molds that were historically used to reconstruct three-dimensional casts. Here, we re-assess these restorations using the original impressions to phylogenetically analyze and re-diagnose the taxon. Unexpectedly, our first-hand scores differ markedly from previous literature-sourced interpretations and yield conflicting tree topologies that nest T. acuta with long-snouted lonchorhynchines, thus destabilizing the long-favored sub-division of trematosaurids based on their skull shape. We attribute this result to character state conflict and suggest that the traditional classification of trematosaurids may mask more complex evolutionary relationships, as well as possible trophic partitioning, and eco-morphological plasticity. |
format |
Dataset |
author |
Slodownik, Miriam A. Mörs, Thomas Kear, Benjamin P. |
author_facet |
Slodownik, Miriam A. Mörs, Thomas Kear, Benjamin P. |
author_sort |
Slodownik, Miriam A. |
title |
Reassessment of the Early Triassic trematosaurid temnospondyl Tertrema acuta from the Arctic island of Spitsbergen |
title_short |
Reassessment of the Early Triassic trematosaurid temnospondyl Tertrema acuta from the Arctic island of Spitsbergen |
title_full |
Reassessment of the Early Triassic trematosaurid temnospondyl Tertrema acuta from the Arctic island of Spitsbergen |
title_fullStr |
Reassessment of the Early Triassic trematosaurid temnospondyl Tertrema acuta from the Arctic island of Spitsbergen |
title_full_unstemmed |
Reassessment of the Early Triassic trematosaurid temnospondyl Tertrema acuta from the Arctic island of Spitsbergen |
title_sort |
reassessment of the early triassic trematosaurid temnospondyl tertrema acuta from the arctic island of spitsbergen |
publisher |
Taylor & Francis |
publishDate |
2021 |
url |
https://dx.doi.org/10.6084/m9.figshare.14511015 https://tandf.figshare.com/articles/dataset/Reassessment_of_the_Early_Triassic_trematosaurid_temnospondyl_i_Tertrema_acuta_i_from_the_Arctic_island_of_Spitsbergen/14511015 |
long_lat |
ENVELOPE(-74.766,-74.766,62.234,62.234) |
geographic |
Arctic Svalbard Svalbard Archipelago Arctic Island |
geographic_facet |
Arctic Svalbard Svalbard Archipelago Arctic Island |
genre |
Arctic Svalbard Spitsbergen |
genre_facet |
Arctic Svalbard Spitsbergen |
op_relation |
https://dx.doi.org/10.1080/02724634.2021.1900209 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.14511015 https://doi.org/10.1080/02724634.2021.1900209 |
_version_ |
1766329268800847872 |