Final Gondwana breakup: The Paleogene South American native ungulates and the demise of the South America–Antarctica land connection
The biogeographic hypothesis more accepted today is that Antarctica (West Antarctica) and southern South America (Magellan region, Patagonia) were connected by a long and narrow causeway (Weddellian Isthmus) between the Antarctic Peninsula and South America since the Late Cretaceous (Campanian) unti...
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ftconicet:oai:ri.conicet.gov.ar:11336/33269 2023-10-09T21:47:13+02:00 Final Gondwana breakup: The Paleogene South American native ungulates and the demise of the South America–Antarctica land connection Reguero, Marcelo Alfredo Gelfo, Javier Nicolás López, Guillermo Marcos Bond, Mariano Abello, María Alejandra Santillana, Sergio N. Marenssi, Sergio Alfredo application/pdf http://hdl.handle.net/11336/33269 eng eng Elsevier Science info:eu-repo/semantics/altIdentifier/doi/10.1016/j.gloplacha.2014.07.016 info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0921818114001507 http://hdl.handle.net/11336/33269 López, Guillermo Marcos; Abello, María Alejandra; Gelfo, Javier Nicolás; Marenssi, Sergio Alfredo; Reguero, Marcelo Alfredo; Bond, Mariano; et al.; Final Gondwana breakup: The Paleogene South American native ungulates and the demise of the South America–Antarctica land connection; Elsevier Science; Global and Planetary Change; 123; B; 11-2014; 400-413 0921-8181 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ West Antarctica South America Land Connection Early Paleogene South American And Antarctic Native Ungulate https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1016/j.gloplacha.2014.07.016 2023-09-24T19:20:27Z The biogeographic hypothesis more accepted today is that Antarctica (West Antarctica) and southern South America (Magellan region, Patagonia) were connected by a long and narrow causeway (Weddellian Isthmus) between the Antarctic Peninsula and South America since the Late Cretaceous (Campanian) until the Early Paleogene allowing terrestrial vertebrates to colonize new frontiers using this land bridge. Stratigraphically calibrated phylogenies including large, terrestrial native ungulates Litopterna and Astrapotheria taxa reveal long ghost lineages that extended into the Late Paleocene and provide evidence for the minimum times at which these “native ungulates” were present both on Antarctica and South America. Based on these results we estimate that the Weddellian Isthmus was functional as a land bridge until the Late Paleocene. Our data place the disconnection between Antarctica and South America in the Late Paleocene, indicating that the terrestrial faunistic isolation (Simpson's “splendid isolation”) in South America begun at the end of the Paleocene (~ 56 to 57 m.y.). This faunistic isolation is documented to have occurred at least 25 Ma before the existence of deep-water circulation conditions in Drake Passage (~ 30 m.y.) based on the onset of seafloor spreading in the west Scotia Sea region. We hypothesize that in the early stages of extension (Late Paleocene, ~ 55 m.y.) a wide and relatively shallow epicontinental sea developed between the Antarctic Peninsula and South America drowning the Weddellian Isthmus and preventing the faunal interchange for obligate cursorial terrestrial forms. Fil: Reguero, Marcelo Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Departamento Científico de Paleontología de Vertebrados; Argentina Fil: Gelfo, Javier Nicolás. Consejo ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Dirección Nacional del Antártico Drake Passage Instituto Antártico Argentino Scotia Sea West Antarctica CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic Antarctic Peninsula Argentina Argentino Drake Passage Patagonia Scotia Sea The Antarctic West Antarctica Global and Planetary Change 123 400 413 |
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Open Polar |
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CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
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ftconicet |
language |
English |
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West Antarctica South America Land Connection Early Paleogene South American And Antarctic Native Ungulate https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
West Antarctica South America Land Connection Early Paleogene South American And Antarctic Native Ungulate https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Reguero, Marcelo Alfredo Gelfo, Javier Nicolás López, Guillermo Marcos Bond, Mariano Abello, María Alejandra Santillana, Sergio N. Marenssi, Sergio Alfredo Final Gondwana breakup: The Paleogene South American native ungulates and the demise of the South America–Antarctica land connection |
topic_facet |
West Antarctica South America Land Connection Early Paleogene South American And Antarctic Native Ungulate https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
The biogeographic hypothesis more accepted today is that Antarctica (West Antarctica) and southern South America (Magellan region, Patagonia) were connected by a long and narrow causeway (Weddellian Isthmus) between the Antarctic Peninsula and South America since the Late Cretaceous (Campanian) until the Early Paleogene allowing terrestrial vertebrates to colonize new frontiers using this land bridge. Stratigraphically calibrated phylogenies including large, terrestrial native ungulates Litopterna and Astrapotheria taxa reveal long ghost lineages that extended into the Late Paleocene and provide evidence for the minimum times at which these “native ungulates” were present both on Antarctica and South America. Based on these results we estimate that the Weddellian Isthmus was functional as a land bridge until the Late Paleocene. Our data place the disconnection between Antarctica and South America in the Late Paleocene, indicating that the terrestrial faunistic isolation (Simpson's “splendid isolation”) in South America begun at the end of the Paleocene (~ 56 to 57 m.y.). This faunistic isolation is documented to have occurred at least 25 Ma before the existence of deep-water circulation conditions in Drake Passage (~ 30 m.y.) based on the onset of seafloor spreading in the west Scotia Sea region. We hypothesize that in the early stages of extension (Late Paleocene, ~ 55 m.y.) a wide and relatively shallow epicontinental sea developed between the Antarctic Peninsula and South America drowning the Weddellian Isthmus and preventing the faunal interchange for obligate cursorial terrestrial forms. Fil: Reguero, Marcelo Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Departamento Científico de Paleontología de Vertebrados; Argentina Fil: Gelfo, Javier Nicolás. Consejo ... |
format |
Article in Journal/Newspaper |
author |
Reguero, Marcelo Alfredo Gelfo, Javier Nicolás López, Guillermo Marcos Bond, Mariano Abello, María Alejandra Santillana, Sergio N. Marenssi, Sergio Alfredo |
author_facet |
Reguero, Marcelo Alfredo Gelfo, Javier Nicolás López, Guillermo Marcos Bond, Mariano Abello, María Alejandra Santillana, Sergio N. Marenssi, Sergio Alfredo |
author_sort |
Reguero, Marcelo Alfredo |
title |
Final Gondwana breakup: The Paleogene South American native ungulates and the demise of the South America–Antarctica land connection |
title_short |
Final Gondwana breakup: The Paleogene South American native ungulates and the demise of the South America–Antarctica land connection |
title_full |
Final Gondwana breakup: The Paleogene South American native ungulates and the demise of the South America–Antarctica land connection |
title_fullStr |
Final Gondwana breakup: The Paleogene South American native ungulates and the demise of the South America–Antarctica land connection |
title_full_unstemmed |
Final Gondwana breakup: The Paleogene South American native ungulates and the demise of the South America–Antarctica land connection |
title_sort |
final gondwana breakup: the paleogene south american native ungulates and the demise of the south america–antarctica land connection |
publisher |
Elsevier Science |
url |
http://hdl.handle.net/11336/33269 |
geographic |
Antarctic Antarctic Peninsula Argentina Argentino Drake Passage Patagonia Scotia Sea The Antarctic West Antarctica |
geographic_facet |
Antarctic Antarctic Peninsula Argentina Argentino Drake Passage Patagonia Scotia Sea The Antarctic West Antarctica |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Dirección Nacional del Antártico Drake Passage Instituto Antártico Argentino Scotia Sea West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Dirección Nacional del Antártico Drake Passage Instituto Antártico Argentino Scotia Sea West Antarctica |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.gloplacha.2014.07.016 info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0921818114001507 http://hdl.handle.net/11336/33269 López, Guillermo Marcos; Abello, María Alejandra; Gelfo, Javier Nicolás; Marenssi, Sergio Alfredo; Reguero, Marcelo Alfredo; Bond, Mariano; et al.; Final Gondwana breakup: The Paleogene South American native ungulates and the demise of the South America–Antarctica land connection; Elsevier Science; Global and Planetary Change; 123; B; 11-2014; 400-413 0921-8181 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1016/j.gloplacha.2014.07.016 |
container_title |
Global and Planetary Change |
container_volume |
123 |
container_start_page |
400 |
op_container_end_page |
413 |
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1779310154692427776 |