New records from Banks Island expand the diversity of Eocene fishes from Canada’s western Arctic Greenhouse
Eocene vertebrates from the Canadian Arctic, including sharks, bony fishes, turtles, crocodylians, birds, and mammals, have provided strong evidence for relatively warm ice-free conditions in the Arctic during the Eocene Greenhouse interval. Recent expeditions to Banks Island (Northwest Territories)...
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Canadian Science Publishing
2018
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Online Access: | https://doi.org/10.1139/as-2017-0007 https://doaj.org/article/2eda7d0f2c344b9f9a7187361ea3056d |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:2eda7d0f2c344b9f9a7187361ea3056d 2023-05-15T14:22:18+02:00 New records from Banks Island expand the diversity of Eocene fishes from Canada’s western Arctic Greenhouse Michael D. Gottfried Jaelyn J. Eberle 2018-03-01 https://doi.org/10.1139/as-2017-0007 https://doaj.org/article/2eda7d0f2c344b9f9a7187361ea3056d en fr eng fre Canadian Science Publishing doi:10.1139/as-2017-0007 2368-7460 https://doaj.org/article/2eda7d0f2c344b9f9a7187361ea3056d undefined Arctic Science, Vol 4, Iss 1, Pp 16-24 (2018) eocene arctic greenhouse climate optimum banks island fishes amia eutrichiurides geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2018 fttriple https://doi.org/10.1139/as-2017-0007 2023-01-22T17:50:15Z Eocene vertebrates from the Canadian Arctic, including sharks, bony fishes, turtles, crocodylians, birds, and mammals, have provided strong evidence for relatively warm ice-free conditions in the Arctic during the Eocene Greenhouse interval. Recent expeditions to Banks Island (Northwest Territories) in the western Arctic have recovered a relatively more marine-influenced Eocene fauna, including sand tiger sharks, bony fishes, turtle shell fragments, and a single crocodylian specimen. We report here on new additions to this fauna, including diagnostic large scales that confirm the presence of Amia in the western Arctic. One very large lateral line scale corresponds to a fish approximately 1.4 m in total length, larger than the maximum size for extant Amia calva. We also recovered approximately 100 distinctive teeth that we assign to the teleost genus Eutrichiurides, which is otherwise known from lower latitude Paleogene sites in the United States, India, Africa, and Europe. The genus is interpreted as an ambush predator in shallow marine environments, consistent with the inferred Eocene paleoenvironment of Banks Island. The presence of Eutrichiurides in the Arctic adds a distinctive new element to the Eocene Greenhouse fauna and is intriguing with respect to the biogeography and dispersal capabilities of this taxon. Article in Journal/Newspaper Arctic Arctic Banks Island Northwest Territories Unknown Arctic Northwest Territories Arctic Science |
institution |
Open Polar |
collection |
Unknown |
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fttriple |
language |
English French |
topic |
eocene arctic greenhouse climate optimum banks island fishes amia eutrichiurides geo envir |
spellingShingle |
eocene arctic greenhouse climate optimum banks island fishes amia eutrichiurides geo envir Michael D. Gottfried Jaelyn J. Eberle New records from Banks Island expand the diversity of Eocene fishes from Canada’s western Arctic Greenhouse |
topic_facet |
eocene arctic greenhouse climate optimum banks island fishes amia eutrichiurides geo envir |
description |
Eocene vertebrates from the Canadian Arctic, including sharks, bony fishes, turtles, crocodylians, birds, and mammals, have provided strong evidence for relatively warm ice-free conditions in the Arctic during the Eocene Greenhouse interval. Recent expeditions to Banks Island (Northwest Territories) in the western Arctic have recovered a relatively more marine-influenced Eocene fauna, including sand tiger sharks, bony fishes, turtle shell fragments, and a single crocodylian specimen. We report here on new additions to this fauna, including diagnostic large scales that confirm the presence of Amia in the western Arctic. One very large lateral line scale corresponds to a fish approximately 1.4 m in total length, larger than the maximum size for extant Amia calva. We also recovered approximately 100 distinctive teeth that we assign to the teleost genus Eutrichiurides, which is otherwise known from lower latitude Paleogene sites in the United States, India, Africa, and Europe. The genus is interpreted as an ambush predator in shallow marine environments, consistent with the inferred Eocene paleoenvironment of Banks Island. The presence of Eutrichiurides in the Arctic adds a distinctive new element to the Eocene Greenhouse fauna and is intriguing with respect to the biogeography and dispersal capabilities of this taxon. |
format |
Article in Journal/Newspaper |
author |
Michael D. Gottfried Jaelyn J. Eberle |
author_facet |
Michael D. Gottfried Jaelyn J. Eberle |
author_sort |
Michael D. Gottfried |
title |
New records from Banks Island expand the diversity of Eocene fishes from Canada’s western Arctic Greenhouse |
title_short |
New records from Banks Island expand the diversity of Eocene fishes from Canada’s western Arctic Greenhouse |
title_full |
New records from Banks Island expand the diversity of Eocene fishes from Canada’s western Arctic Greenhouse |
title_fullStr |
New records from Banks Island expand the diversity of Eocene fishes from Canada’s western Arctic Greenhouse |
title_full_unstemmed |
New records from Banks Island expand the diversity of Eocene fishes from Canada’s western Arctic Greenhouse |
title_sort |
new records from banks island expand the diversity of eocene fishes from canada’s western arctic greenhouse |
publisher |
Canadian Science Publishing |
publishDate |
2018 |
url |
https://doi.org/10.1139/as-2017-0007 https://doaj.org/article/2eda7d0f2c344b9f9a7187361ea3056d |
geographic |
Arctic Northwest Territories |
geographic_facet |
Arctic Northwest Territories |
genre |
Arctic Arctic Banks Island Northwest Territories |
genre_facet |
Arctic Arctic Banks Island Northwest Territories |
op_source |
Arctic Science, Vol 4, Iss 1, Pp 16-24 (2018) |
op_relation |
doi:10.1139/as-2017-0007 2368-7460 https://doaj.org/article/2eda7d0f2c344b9f9a7187361ea3056d |
op_rights |
undefined |
op_doi |
https://doi.org/10.1139/as-2017-0007 |
container_title |
Arctic Science |
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1766294937832259584 |