The oldest mammals from Antarctica, early Eocene of the La Meseta Formation, Seymour Island
- Autores
- Gelfo, Javier Nicolás; Mörs, Thomas; Lorente, Malena; López, Guillermo Marcos; Reguero, Marcelo Alfredo
- Año de publicación
- 2015
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- New fossil mammals found at the base of Acantilados II Allomember of the La Meseta Formation, from the early Eocene (Ypresian) of Seymour Island, represent the oldest evidence of this group in Antarctica. Two specimens are here described; the first belongs to a talonid portion of a lower right molar assigned to the sparnotheriodontid litoptern Notiolofos sp. cf. N. arquinotiensis. Sparnotheriodontid were medium- to large-sized ungulates, with a wide distribution in the Eocene of South America and Antarctica. The second specimen is an intermediate phalanx referred to an indeterminate Eutheria, probably a South American native ungulate. These Antarctic findings in sediments of 55.3 Ma query the minimum age needed for terrestrial mammals to spread from South America to Antarctica, which should have occurred before the final break-up of Gondwana. This event involves the disappearance of the land bridge formed by the Weddellian Isthmus, which connected West Antarctica and southern South America from the Late Cretaceous until sometime in the earliest Palaeogene.
Facultad de Ciencias Naturales y Museo - Materia
-
Paleontología
West Antarctica
Palaeogene
Ypresian
Tooth and bone morphology
Ungulates
Sparnotheriodontidae - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/119193
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The oldest mammals from Antarctica, early Eocene of the La Meseta Formation, Seymour IslandGelfo, Javier NicolásMörs, ThomasLorente, MalenaLópez, Guillermo MarcosReguero, Marcelo AlfredoPaleontologíaWest AntarcticaPalaeogeneYpresianTooth and bone morphologyUngulatesSparnotheriodontidaeNew fossil mammals found at the base of Acantilados II Allomember of the La Meseta Formation, from the early Eocene (Ypresian) of Seymour Island, represent the oldest evidence of this group in Antarctica. Two specimens are here described; the first belongs to a talonid portion of a lower right molar assigned to the sparnotheriodontid litoptern Notiolofos sp. cf. N. arquinotiensis. Sparnotheriodontid were medium- to large-sized ungulates, with a wide distribution in the Eocene of South America and Antarctica. The second specimen is an intermediate phalanx referred to an indeterminate Eutheria, probably a South American native ungulate. These Antarctic findings in sediments of 55.3 Ma query the minimum age needed for terrestrial mammals to spread from South America to Antarctica, which should have occurred before the final break-up of Gondwana. This event involves the disappearance of the land bridge formed by the Weddellian Isthmus, which connected West Antarctica and southern South America from the Late Cretaceous until sometime in the earliest Palaeogene.Facultad de Ciencias Naturales y Museo2015info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf101-110http://sedici.unlp.edu.ar/handle/10915/119193enginfo:eu-repo/semantics/altIdentifier/issn/1475-4983info:eu-repo/semantics/altIdentifier/doi/10.1111/pala.12121info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc/4.0/Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:28:05Zoai:sedici.unlp.edu.ar:10915/119193Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:28:05.887SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
The oldest mammals from Antarctica, early Eocene of the La Meseta Formation, Seymour Island |
title |
The oldest mammals from Antarctica, early Eocene of the La Meseta Formation, Seymour Island |
spellingShingle |
The oldest mammals from Antarctica, early Eocene of the La Meseta Formation, Seymour Island Gelfo, Javier Nicolás Paleontología West Antarctica Palaeogene Ypresian Tooth and bone morphology Ungulates Sparnotheriodontidae |
title_short |
The oldest mammals from Antarctica, early Eocene of the La Meseta Formation, Seymour Island |
title_full |
The oldest mammals from Antarctica, early Eocene of the La Meseta Formation, Seymour Island |
title_fullStr |
The oldest mammals from Antarctica, early Eocene of the La Meseta Formation, Seymour Island |
title_full_unstemmed |
The oldest mammals from Antarctica, early Eocene of the La Meseta Formation, Seymour Island |
title_sort |
The oldest mammals from Antarctica, early Eocene of the La Meseta Formation, Seymour Island |
dc.creator.none.fl_str_mv |
Gelfo, Javier Nicolás Mörs, Thomas Lorente, Malena López, Guillermo Marcos Reguero, Marcelo Alfredo |
author |
Gelfo, Javier Nicolás |
author_facet |
Gelfo, Javier Nicolás Mörs, Thomas Lorente, Malena López, Guillermo Marcos Reguero, Marcelo Alfredo |
author_role |
author |
author2 |
Mörs, Thomas Lorente, Malena López, Guillermo Marcos Reguero, Marcelo Alfredo |
author2_role |
author author author author |
dc.subject.none.fl_str_mv |
Paleontología West Antarctica Palaeogene Ypresian Tooth and bone morphology Ungulates Sparnotheriodontidae |
topic |
Paleontología West Antarctica Palaeogene Ypresian Tooth and bone morphology Ungulates Sparnotheriodontidae |
dc.description.none.fl_txt_mv |
New fossil mammals found at the base of Acantilados II Allomember of the La Meseta Formation, from the early Eocene (Ypresian) of Seymour Island, represent the oldest evidence of this group in Antarctica. Two specimens are here described; the first belongs to a talonid portion of a lower right molar assigned to the sparnotheriodontid litoptern Notiolofos sp. cf. N. arquinotiensis. Sparnotheriodontid were medium- to large-sized ungulates, with a wide distribution in the Eocene of South America and Antarctica. The second specimen is an intermediate phalanx referred to an indeterminate Eutheria, probably a South American native ungulate. These Antarctic findings in sediments of 55.3 Ma query the minimum age needed for terrestrial mammals to spread from South America to Antarctica, which should have occurred before the final break-up of Gondwana. This event involves the disappearance of the land bridge formed by the Weddellian Isthmus, which connected West Antarctica and southern South America from the Late Cretaceous until sometime in the earliest Palaeogene. Facultad de Ciencias Naturales y Museo |
description |
New fossil mammals found at the base of Acantilados II Allomember of the La Meseta Formation, from the early Eocene (Ypresian) of Seymour Island, represent the oldest evidence of this group in Antarctica. Two specimens are here described; the first belongs to a talonid portion of a lower right molar assigned to the sparnotheriodontid litoptern Notiolofos sp. cf. N. arquinotiensis. Sparnotheriodontid were medium- to large-sized ungulates, with a wide distribution in the Eocene of South America and Antarctica. The second specimen is an intermediate phalanx referred to an indeterminate Eutheria, probably a South American native ungulate. These Antarctic findings in sediments of 55.3 Ma query the minimum age needed for terrestrial mammals to spread from South America to Antarctica, which should have occurred before the final break-up of Gondwana. This event involves the disappearance of the land bridge formed by the Weddellian Isthmus, which connected West Antarctica and southern South America from the Late Cretaceous until sometime in the earliest Palaeogene. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://sedici.unlp.edu.ar/handle/10915/119193 |
url |
http://sedici.unlp.edu.ar/handle/10915/119193 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/issn/1475-4983 info:eu-repo/semantics/altIdentifier/doi/10.1111/pala.12121 |
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info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc/4.0/ Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) |
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openAccess |
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http://creativecommons.org/licenses/by-nc/4.0/ Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) |
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application/pdf 101-110 |
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