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dc.contributor.author
Kriwet, Jürgen
dc.contributor.author
Engelbrecht, Andrea
dc.contributor.author
Mörs, Thomas
dc.contributor.author
Reguero, Marcelo Alfredo
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dc.contributor.author
Pfaff, Cathrin
dc.date.available
2018-08-06T21:01:22Z
dc.date.issued
2016-07
dc.identifier.citation
Kriwet, Jürgen; Engelbrecht, Andrea; Mörs, Thomas; Reguero, Marcelo Alfredo; Pfaff, Cathrin; Ultimate Eocene (Priabonian) chondrichthyans (Holocephali, Elasmobranchii) of Antarctica; Society of Vertebrate Paleontology; Journal of Vertebrate Paleontology; 36; 4; 7-2016; 1-19; e1160911
dc.identifier.issn
0272-4634
dc.identifier.uri
http://hdl.handle.net/11336/54351
dc.description.abstract
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.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Society of Vertebrate Paleontology
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Chondrichthyans
dc.subject
Paleogene
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Submeseta Fm.
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Antarctica
dc.subject.classification
Paleontología
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dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Ultimate Eocene (Priabonian) chondrichthyans (Holocephali, Elasmobranchii) of Antarctica
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-08-06T17:41:22Z
dc.journal.volume
36
dc.journal.number
4
dc.journal.pagination
1-19; e1160911
dc.journal.pais
Estados Unidos
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dc.description.fil
Fil: Kriwet, Jürgen. Universidad de Viena; Austria
dc.description.fil
Fil: Engelbrecht, Andrea. Universidad de Viena; Austria
dc.description.fil
Fil: Mörs, Thomas. Swedish Museum of Natural History; Suecia
dc.description.fil
Fil: Reguero, Marcelo Alfredo. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Pfaff, Cathrin. Universidad de Viena; Austria
dc.journal.title
Journal of Vertebrate Paleontology
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1080/02724634.2016.1160911
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/abs/10.1080/02724634.2016.1160911
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5346486/
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