Ultimate Eocene (Priabonian) chondrichthyans (Holocephali, Elasmobranchii) of Antarctica
The Eocene La Meseta Formation on Seymour Island, Antarctic Peninsula, is known for its remarkable wealth of fossil remains of chondrichthyans and teleosts. Chondrichthyans seemingly were dominant elements in the Antarctic Paleogene fish fauna, but decreased in abundance from middle to late Eocene,...
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2016
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ftdatacite:10.6084/m9.figshare.3470657 2023-05-15T13:34:28+02:00 Ultimate Eocene (Priabonian) chondrichthyans (Holocephali, Elasmobranchii) of Antarctica Kriwet, Jürgen Engelbrecht, Andrea Mörs, Thomas Reguero, Marcelo Pfaff, Cathrin 2016 https://dx.doi.org/10.6084/m9.figshare.3470657 https://tandf.figshare.com/articles/media/Ultimate_Eocene_Priabonian_chondrichthyans_Holocephali_Elasmobranchii_of_Antarctica/3470657 unknown Taylor & Francis https://dx.doi.org/10.1080/02724634.2016.1160911 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Molecular Biology Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Marine Biology Cancer Inorganic Chemistry FOS Chemical sciences article MediaObject Media Audiovisual 2016 ftdatacite https://doi.org/10.6084/m9.figshare.3470657 https://doi.org/10.1080/02724634.2016.1160911 2021-11-05T12:55:41Z The Eocene La Meseta Formation on Seymour Island, Antarctic Peninsula, is known for its remarkable wealth of fossil remains of chondrichthyans and teleosts. Chondrichthyans seemingly were dominant elements in the Antarctic Paleogene fish fauna, but decreased in abundance from middle to late Eocene, during which time remains of bony fishes increase. This decline of chondrichthyans at the end of the Eocene generally is related to sudden cooling of seawater, reduction in shelf area, and increasing shelf depth due to the onset of the Antarctic thermal isolation. The last chondrichthyan records known so far include a chimeroid tooth plate from TELM 6 (Lutetian) and a single pristiophorid rostral spine from TELM 7 (Priabonian). Here, we present new chondrichthyan records of Squalus, Squatina, Pristiophorus, Striatolamia, Palaeohypotodus, Carcharocles , and Ischyodus from the upper parts of TELM 7 (Priabonian), including the first record of Carcharocles sokolovi from Antarctica. This assemblage suggests that chondrichthyans persisted much longer in Antarctic waters despite rather cool sea surface temperatures of approximately 5°C. The final disappearance of chondrichthyans at the Eocene–Oligocene boundary concurs with abrupt ice sheet formation in Antarctica. Diversity patterns of chondrichthyans throughout the La Meseta Formation appear to be related to climatic conditions rather than plate tectonics. SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at www.tandfonline.com/ujvp Citation for this article: Kriwet, J., A. Engelbrecht, T. Mörs, M. Reguero, and C. Pfaff. 2016. Ultimate Eocene (Priabonian) chondrichthyans (Holocephali, Elasmobranchii) of Antarctica. Journal of Vertebrate Paleontology. DOI: 10.1080/02724634.2016.1160911. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet Seymour Island DataCite Metadata Store (German National Library of Science and Technology) Antarctic Antarctic Peninsula Pfaff ENVELOPE(-67.733,-67.733,-66.883,-66.883) Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Seymour Island ENVELOPE(-56.750,-56.750,-64.283,-64.283) The Antarctic |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Molecular Biology Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Marine Biology Cancer Inorganic Chemistry FOS Chemical sciences |
spellingShingle |
Molecular Biology Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Marine Biology Cancer Inorganic Chemistry FOS Chemical sciences Kriwet, Jürgen Engelbrecht, Andrea Mörs, Thomas Reguero, Marcelo Pfaff, Cathrin Ultimate Eocene (Priabonian) chondrichthyans (Holocephali, Elasmobranchii) of Antarctica |
topic_facet |
Molecular Biology Evolutionary Biology FOS Biological sciences 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences Ecology Marine Biology Cancer Inorganic Chemistry FOS Chemical sciences |
description |
The Eocene La Meseta Formation on Seymour Island, Antarctic Peninsula, is known for its remarkable wealth of fossil remains of chondrichthyans and teleosts. Chondrichthyans seemingly were dominant elements in the Antarctic Paleogene fish fauna, but decreased in abundance from middle to late Eocene, during which time remains of bony fishes increase. This decline of chondrichthyans at the end of the Eocene generally is related to sudden cooling of seawater, reduction in shelf area, and increasing shelf depth due to the onset of the Antarctic thermal isolation. The last chondrichthyan records known so far include a chimeroid tooth plate from TELM 6 (Lutetian) and a single pristiophorid rostral spine from TELM 7 (Priabonian). Here, we present new chondrichthyan records of Squalus, Squatina, Pristiophorus, Striatolamia, Palaeohypotodus, Carcharocles , and Ischyodus from the upper parts of TELM 7 (Priabonian), including the first record of Carcharocles sokolovi from Antarctica. This assemblage suggests that chondrichthyans persisted much longer in Antarctic waters despite rather cool sea surface temperatures of approximately 5°C. The final disappearance of chondrichthyans at the Eocene–Oligocene boundary concurs with abrupt ice sheet formation in Antarctica. Diversity patterns of chondrichthyans throughout the La Meseta Formation appear to be related to climatic conditions rather than plate tectonics. SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at www.tandfonline.com/ujvp Citation for this article: Kriwet, J., A. Engelbrecht, T. Mörs, M. Reguero, and C. Pfaff. 2016. Ultimate Eocene (Priabonian) chondrichthyans (Holocephali, Elasmobranchii) of Antarctica. Journal of Vertebrate Paleontology. DOI: 10.1080/02724634.2016.1160911. |
format |
Article in Journal/Newspaper |
author |
Kriwet, Jürgen Engelbrecht, Andrea Mörs, Thomas Reguero, Marcelo Pfaff, Cathrin |
author_facet |
Kriwet, Jürgen Engelbrecht, Andrea Mörs, Thomas Reguero, Marcelo Pfaff, Cathrin |
author_sort |
Kriwet, Jürgen |
title |
Ultimate Eocene (Priabonian) chondrichthyans (Holocephali, Elasmobranchii) of Antarctica |
title_short |
Ultimate Eocene (Priabonian) chondrichthyans (Holocephali, Elasmobranchii) of Antarctica |
title_full |
Ultimate Eocene (Priabonian) chondrichthyans (Holocephali, Elasmobranchii) of Antarctica |
title_fullStr |
Ultimate Eocene (Priabonian) chondrichthyans (Holocephali, Elasmobranchii) of Antarctica |
title_full_unstemmed |
Ultimate Eocene (Priabonian) chondrichthyans (Holocephali, Elasmobranchii) of Antarctica |
title_sort |
ultimate eocene (priabonian) chondrichthyans (holocephali, elasmobranchii) of antarctica |
publisher |
Taylor & Francis |
publishDate |
2016 |
url |
https://dx.doi.org/10.6084/m9.figshare.3470657 https://tandf.figshare.com/articles/media/Ultimate_Eocene_Priabonian_chondrichthyans_Holocephali_Elasmobranchii_of_Antarctica/3470657 |
long_lat |
ENVELOPE(-67.733,-67.733,-66.883,-66.883) ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) |
geographic |
Antarctic Antarctic Peninsula Pfaff Seymour Seymour Island The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Pfaff Seymour Seymour Island The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet Seymour Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Ice Sheet Seymour Island |
op_relation |
https://dx.doi.org/10.1080/02724634.2016.1160911 |
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.3470657 https://doi.org/10.1080/02724634.2016.1160911 |
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1766053213561159680 |