Late Cretaceous Plesiosaur Teeth from Axel Heiberg Island, Nunavut, Canada
We report the discovery of Late Cretaceous plesiosaur teeth from non-marine strata on Axel Heiberg Island in the Canadian High Arctic. In comparison to other plesiosaur teeth, these specimens are most similar to the teeth of elasmosaurs: they have a smooth outer surface and crenulated inner surface,...
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The Arctic Institute of North America
2009
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ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/63428 2023-05-15T14:19:05+02:00 Late Cretaceous Plesiosaur Teeth from Axel Heiberg Island, Nunavut, Canada Vandermark, Deborah Tarduno, John A. Brinkman, Donald B. 2009-12-18 application/pdf https://journalhosting.ucalgary.ca/index.php/arctic/article/view/63428 eng eng The Arctic Institute of North America https://journalhosting.ucalgary.ca/index.php/arctic/article/view/63428/47365 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/63428 ARCTIC; Vol. 59 No. 1 (2006): March: 1–113; 79-82 1923-1245 0004-0843 Late Cretaceous Axel Heiberg Island elasmosaurids paleoclimate paleoenvironment Crétacé supérieur île Axel Heiberg elasmosaures paléoclimat paléoenvironnement info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 2009 ftunivcalgaryojs 2022-03-22T21:20:48Z We report the discovery of Late Cretaceous plesiosaur teeth from non-marine strata on Axel Heiberg Island in the Canadian High Arctic. In comparison to other plesiosaur teeth, these specimens are most similar to the teeth of elasmosaurs: they have a smooth outer surface and crenulated inner surface, with crenulations that extend nearly to the tip of the tooth. Comparisons with elasmosaurid fossils elsewhere indicate that the Axel Heiberg teeth are from juveniles. The presence of a plesiosaur in nonmarine strata on Axel Heiberg Island supports the suggestion that juvenile elasmosaurs frequently inhabited freshwater environments. The temporal distribution of the Axel Heiberg specimens and other occurrences from the High Arctic suggests that elasmosaurids may have expanded their range during a time of extreme climatic warmth. On signale la découverte de dents de plésiosaure du Crétacé supérieur d’une strate non marine à l’île Axel Heiberg, dans l’Extrême-Arctique canadien. Comparativement aux autres dents de plésiosaures, ces spécimens ressemblent beaucoup aux dents d’elasmosaures : leur surface extérieure est lisse et leur surface intérieure est crénelée, les crénulations s’étendant presque jusqu’à la pointe de la dent. Après avoir comparé ces spécimens aux fossiles d’elasmosaures trouvés ailleurs, on a remarqué que les dents trouvées à Axel Heiberg sont les dents de juvéniles. La présence d’un plésiosaure dans une strate non marine de l’île Axel Heiberg vient étayer la suggestion selon laquelle des elasmosaures juvéniles évoluaient souvent dans les milieux dulçaquicoles. La répartition temporelle des spécimens d’Axel Heiberg et d’autres occurrences de l’Extrême-Arctique laissent suggérer que les elasmosaures auraient pu étendre leur parcours au cours d’une période d’extrême chaleur climatique. Article in Journal/Newspaper Arctic Arctic Arctique* Axel Heiberg Island Île Axel Heiberg Nunavut University of Calgary Journal Hosting Arctic Axel Heiberg Island ENVELOPE(-91.001,-91.001,79.752,79.752) Canada Découverte ENVELOPE(141.558,141.558,-66.775,-66.775) Dent ENVELOPE(140.050,140.050,-66.649,-66.649) Heiberg ENVELOPE(13.964,13.964,66.424,66.424) La Dent ENVELOPE(140.050,140.050,-66.649,-66.649) Les Dents ENVELOPE(-70.967,-70.967,-68.950,-68.950) Nunavut ARCTIC 59 1 |
institution |
Open Polar |
collection |
University of Calgary Journal Hosting |
op_collection_id |
ftunivcalgaryojs |
language |
English |
topic |
Late Cretaceous Axel Heiberg Island elasmosaurids paleoclimate paleoenvironment Crétacé supérieur île Axel Heiberg elasmosaures paléoclimat paléoenvironnement |
spellingShingle |
Late Cretaceous Axel Heiberg Island elasmosaurids paleoclimate paleoenvironment Crétacé supérieur île Axel Heiberg elasmosaures paléoclimat paléoenvironnement Vandermark, Deborah Tarduno, John A. Brinkman, Donald B. Late Cretaceous Plesiosaur Teeth from Axel Heiberg Island, Nunavut, Canada |
topic_facet |
Late Cretaceous Axel Heiberg Island elasmosaurids paleoclimate paleoenvironment Crétacé supérieur île Axel Heiberg elasmosaures paléoclimat paléoenvironnement |
description |
We report the discovery of Late Cretaceous plesiosaur teeth from non-marine strata on Axel Heiberg Island in the Canadian High Arctic. In comparison to other plesiosaur teeth, these specimens are most similar to the teeth of elasmosaurs: they have a smooth outer surface and crenulated inner surface, with crenulations that extend nearly to the tip of the tooth. Comparisons with elasmosaurid fossils elsewhere indicate that the Axel Heiberg teeth are from juveniles. The presence of a plesiosaur in nonmarine strata on Axel Heiberg Island supports the suggestion that juvenile elasmosaurs frequently inhabited freshwater environments. The temporal distribution of the Axel Heiberg specimens and other occurrences from the High Arctic suggests that elasmosaurids may have expanded their range during a time of extreme climatic warmth. On signale la découverte de dents de plésiosaure du Crétacé supérieur d’une strate non marine à l’île Axel Heiberg, dans l’Extrême-Arctique canadien. Comparativement aux autres dents de plésiosaures, ces spécimens ressemblent beaucoup aux dents d’elasmosaures : leur surface extérieure est lisse et leur surface intérieure est crénelée, les crénulations s’étendant presque jusqu’à la pointe de la dent. Après avoir comparé ces spécimens aux fossiles d’elasmosaures trouvés ailleurs, on a remarqué que les dents trouvées à Axel Heiberg sont les dents de juvéniles. La présence d’un plésiosaure dans une strate non marine de l’île Axel Heiberg vient étayer la suggestion selon laquelle des elasmosaures juvéniles évoluaient souvent dans les milieux dulçaquicoles. La répartition temporelle des spécimens d’Axel Heiberg et d’autres occurrences de l’Extrême-Arctique laissent suggérer que les elasmosaures auraient pu étendre leur parcours au cours d’une période d’extrême chaleur climatique. |
format |
Article in Journal/Newspaper |
author |
Vandermark, Deborah Tarduno, John A. Brinkman, Donald B. |
author_facet |
Vandermark, Deborah Tarduno, John A. Brinkman, Donald B. |
author_sort |
Vandermark, Deborah |
title |
Late Cretaceous Plesiosaur Teeth from Axel Heiberg Island, Nunavut, Canada |
title_short |
Late Cretaceous Plesiosaur Teeth from Axel Heiberg Island, Nunavut, Canada |
title_full |
Late Cretaceous Plesiosaur Teeth from Axel Heiberg Island, Nunavut, Canada |
title_fullStr |
Late Cretaceous Plesiosaur Teeth from Axel Heiberg Island, Nunavut, Canada |
title_full_unstemmed |
Late Cretaceous Plesiosaur Teeth from Axel Heiberg Island, Nunavut, Canada |
title_sort |
late cretaceous plesiosaur teeth from axel heiberg island, nunavut, canada |
publisher |
The Arctic Institute of North America |
publishDate |
2009 |
url |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/63428 |
long_lat |
ENVELOPE(-91.001,-91.001,79.752,79.752) ENVELOPE(141.558,141.558,-66.775,-66.775) ENVELOPE(140.050,140.050,-66.649,-66.649) ENVELOPE(13.964,13.964,66.424,66.424) ENVELOPE(140.050,140.050,-66.649,-66.649) ENVELOPE(-70.967,-70.967,-68.950,-68.950) |
geographic |
Arctic Axel Heiberg Island Canada Découverte Dent Heiberg La Dent Les Dents Nunavut |
geographic_facet |
Arctic Axel Heiberg Island Canada Découverte Dent Heiberg La Dent Les Dents Nunavut |
genre |
Arctic Arctic Arctique* Axel Heiberg Island Île Axel Heiberg Nunavut |
genre_facet |
Arctic Arctic Arctique* Axel Heiberg Island Île Axel Heiberg Nunavut |
op_source |
ARCTIC; Vol. 59 No. 1 (2006): March: 1–113; 79-82 1923-1245 0004-0843 |
op_relation |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/63428/47365 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/63428 |
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