Vertebral size ratios and the ichthyosaurian vertebral column – a case study based on Late Jurassic fossils from North-East Greenland
Vertebral centra are some of the most common fossils from ichthyosaurs and thus valuable for understanding these marine reptiles. This study sets out to provide further information on the dimensional ratios of centra and how these might be used to obtain more information about an assemblage of Late...
Published in: | Bulletin of the Geological Society of Denmark |
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Language: | English |
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2022
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Online Access: | https://curis.ku.dk/portal/da/publications/vertebral-size-ratios-and-the-ichthyosaurian-vertebral-column--a-case-study-based-on-late-jurassic-fossils-from-northeast-greenland(ac7e2f0d-869b-4b01-a28d-47495518edbd).html https://doi.org/10.37570/bgsd-2022-70-01 https://curis.ku.dk/ws/files/337689513/bull70_1_17.pdf |
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ftcopenhagenunip:oai:pure.atira.dk:publications/ac7e2f0d-869b-4b01-a28d-47495518edbd 2024-04-14T08:11:01+00:00 Vertebral size ratios and the ichthyosaurian vertebral column – a case study based on Late Jurassic fossils from North-East Greenland Holm, Thomas Bang Delsett, Lene Liebe Alsen, Peter 2022 application/pdf https://curis.ku.dk/portal/da/publications/vertebral-size-ratios-and-the-ichthyosaurian-vertebral-column--a-case-study-based-on-late-jurassic-fossils-from-northeast-greenland(ac7e2f0d-869b-4b01-a28d-47495518edbd).html https://doi.org/10.37570/bgsd-2022-70-01 https://curis.ku.dk/ws/files/337689513/bull70_1_17.pdf eng eng info:eu-repo/semantics/openAccess Holm , T B , Delsett , L L & Alsen , P 2022 , ' Vertebral size ratios and the ichthyosaurian vertebral column – a case study based on Late Jurassic fossils from North-East Greenland ' , Bulletin of the Geological Society of Denmark , vol. 70 , pp. 1-18 . https://doi.org/10.37570/bgsd-2022-70-01 Greenland Ichthyosaur Kuhn Ø morphology ratios Ugpik Ravine Member vertebrae vertebral regionalisation article 2022 ftcopenhagenunip https://doi.org/10.37570/bgsd-2022-70-01 2024-03-21T17:28:20Z Vertebral centra are some of the most common fossils from ichthyosaurs and thus valuable for understanding these marine reptiles. This study sets out to provide further information on the dimensional ratios of centra and how these might be used to obtain more information about an assemblage of Late Jurassic disarticulated centra found at Kingofjeldet on Kuhn Ø in North-East Greenland in 2017. The centra are used to test whether vertebral ratios (H:W and H:L) can be used to assign disarticulated and possibly weathered centra to a region in the vertebral column. In order to evaluate this, the ratios of the centra from Greenland were compared with those of five articulated and well-known ophthalmosaurid specimens, as well as classical traits based on morphology. Assigning the correct position in the vertebral column from ratios is, however, not straightforward. Firstly, comparing different ichthyosaur taxa gives different possible positions for the disarticulated centra. Secondly, centra from different vertebral regions commonly display similar ratios. Thirdly, ratios are sensitive to alteration by taphonomic processes. The ratios of the centra hints towards an ichthyosaur with a more regionalised vertebral column being present in the Late Jurassic sea of North-East Greenland. Further studies are needed to improve our understanding of the significance of the degree of regionalisation of the vertebral column among ichthyosaurs. Article in Journal/Newspaper East Greenland Greenland Kuhn ø University of Copenhagen: Research Greenland Kuhn Ø ENVELOPE(-20.267,-20.267,74.851,74.851) Bulletin of the Geological Society of Denmark 70 1 17 |
institution |
Open Polar |
collection |
University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
topic |
Greenland Ichthyosaur Kuhn Ø morphology ratios Ugpik Ravine Member vertebrae vertebral regionalisation |
spellingShingle |
Greenland Ichthyosaur Kuhn Ø morphology ratios Ugpik Ravine Member vertebrae vertebral regionalisation Holm, Thomas Bang Delsett, Lene Liebe Alsen, Peter Vertebral size ratios and the ichthyosaurian vertebral column – a case study based on Late Jurassic fossils from North-East Greenland |
topic_facet |
Greenland Ichthyosaur Kuhn Ø morphology ratios Ugpik Ravine Member vertebrae vertebral regionalisation |
description |
Vertebral centra are some of the most common fossils from ichthyosaurs and thus valuable for understanding these marine reptiles. This study sets out to provide further information on the dimensional ratios of centra and how these might be used to obtain more information about an assemblage of Late Jurassic disarticulated centra found at Kingofjeldet on Kuhn Ø in North-East Greenland in 2017. The centra are used to test whether vertebral ratios (H:W and H:L) can be used to assign disarticulated and possibly weathered centra to a region in the vertebral column. In order to evaluate this, the ratios of the centra from Greenland were compared with those of five articulated and well-known ophthalmosaurid specimens, as well as classical traits based on morphology. Assigning the correct position in the vertebral column from ratios is, however, not straightforward. Firstly, comparing different ichthyosaur taxa gives different possible positions for the disarticulated centra. Secondly, centra from different vertebral regions commonly display similar ratios. Thirdly, ratios are sensitive to alteration by taphonomic processes. The ratios of the centra hints towards an ichthyosaur with a more regionalised vertebral column being present in the Late Jurassic sea of North-East Greenland. Further studies are needed to improve our understanding of the significance of the degree of regionalisation of the vertebral column among ichthyosaurs. |
format |
Article in Journal/Newspaper |
author |
Holm, Thomas Bang Delsett, Lene Liebe Alsen, Peter |
author_facet |
Holm, Thomas Bang Delsett, Lene Liebe Alsen, Peter |
author_sort |
Holm, Thomas Bang |
title |
Vertebral size ratios and the ichthyosaurian vertebral column – a case study based on Late Jurassic fossils from North-East Greenland |
title_short |
Vertebral size ratios and the ichthyosaurian vertebral column – a case study based on Late Jurassic fossils from North-East Greenland |
title_full |
Vertebral size ratios and the ichthyosaurian vertebral column – a case study based on Late Jurassic fossils from North-East Greenland |
title_fullStr |
Vertebral size ratios and the ichthyosaurian vertebral column – a case study based on Late Jurassic fossils from North-East Greenland |
title_full_unstemmed |
Vertebral size ratios and the ichthyosaurian vertebral column – a case study based on Late Jurassic fossils from North-East Greenland |
title_sort |
vertebral size ratios and the ichthyosaurian vertebral column – a case study based on late jurassic fossils from north-east greenland |
publishDate |
2022 |
url |
https://curis.ku.dk/portal/da/publications/vertebral-size-ratios-and-the-ichthyosaurian-vertebral-column--a-case-study-based-on-late-jurassic-fossils-from-northeast-greenland(ac7e2f0d-869b-4b01-a28d-47495518edbd).html https://doi.org/10.37570/bgsd-2022-70-01 https://curis.ku.dk/ws/files/337689513/bull70_1_17.pdf |
long_lat |
ENVELOPE(-20.267,-20.267,74.851,74.851) |
geographic |
Greenland Kuhn Ø |
geographic_facet |
Greenland Kuhn Ø |
genre |
East Greenland Greenland Kuhn ø |
genre_facet |
East Greenland Greenland Kuhn ø |
op_source |
Holm , T B , Delsett , L L & Alsen , P 2022 , ' Vertebral size ratios and the ichthyosaurian vertebral column – a case study based on Late Jurassic fossils from North-East Greenland ' , Bulletin of the Geological Society of Denmark , vol. 70 , pp. 1-18 . https://doi.org/10.37570/bgsd-2022-70-01 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.37570/bgsd-2022-70-01 |
container_title |
Bulletin of the Geological Society of Denmark |
container_volume |
70 |
container_start_page |
1 |
op_container_end_page |
17 |
_version_ |
1796308669710729216 |