Final Gondwana breakup: The Paleogene South American native ungulates and the demise of the South America-Antarctica land connection

Autores
Reguero, Marcelo Alfredo; Gelfo, Javier Nicolás; López, Guillermo Marcos; Bond, Mariano; Abello, María Alejandra; Santillana, Sergio N.; Marenssi, Sergio Alfredo
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
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. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Facultad de Ciencias Naturales y Museo, Universidad Nacional de la Plata; Argentina
Fil: Gelfo, Javier Nicolás. Facultad de Ciencias Naturales y Museo, Universidad Nacional de la Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: López, Guillermo Marcos. Facultad de Ciencias Naturales y Museo, Universidad Nacional de la Plata; Argentina
Fil: Bond, Mariano. Facultad de Ciencias Naturales y Museo, Universidad Nacional de la Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Abello, María Alejandra. Facultad de Ciencias Naturales y Museo, Universidad Nacional de la Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Santillana, Sergio N.. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina
Fil: Marenssi, Sergio Alfredo. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina
Materia
Early Paleogene
Land Connection
South America
South American And Antarctic Native Ungulate
West Antarctica
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/79923
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Final Gondwana breakup: The Paleogene South American native ungulates and the demise of the South America-Antarctica land connectionReguero, Marcelo AlfredoGelfo, Javier NicolásLópez, Guillermo MarcosBond, MarianoAbello, María AlejandraSantillana, Sergio N.Marenssi, Sergio AlfredoEarly PaleogeneLand ConnectionSouth AmericaSouth American And Antarctic Native UngulateWest Antarcticahttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The 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. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Facultad de Ciencias Naturales y Museo, Universidad Nacional de la Plata; ArgentinaFil: Gelfo, Javier Nicolás. Facultad de Ciencias Naturales y Museo, Universidad Nacional de la Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: López, Guillermo Marcos. Facultad de Ciencias Naturales y Museo, Universidad Nacional de la Plata; ArgentinaFil: Bond, Mariano. Facultad de Ciencias Naturales y Museo, Universidad Nacional de la Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Abello, María Alejandra. Facultad de Ciencias Naturales y Museo, Universidad Nacional de la Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Santillana, Sergio N.. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; ArgentinaFil: Marenssi, Sergio Alfredo. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; ArgentinaElsevier Science2014-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/79923Reguero, Marcelo Alfredo; Gelfo, Javier Nicolás; López, Guillermo Marcos; Bond, Mariano; Abello, María Alejandra; 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; Part B; 12-2014; 400-4130921-8181CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.gloplacha.2014.07.016info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0921818114001507info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:31:59Zoai:ri.conicet.gov.ar:11336/79923instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:31:59.619CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Final Gondwana breakup: The Paleogene South American native ungulates and the demise of the South America-Antarctica land connection
title Final Gondwana breakup: The Paleogene South American native ungulates and the demise of the South America-Antarctica land connection
spellingShingle Final Gondwana breakup: The Paleogene South American native ungulates and the demise of the South America-Antarctica land connection
Reguero, Marcelo Alfredo
Early Paleogene
Land Connection
South America
South American And Antarctic Native Ungulate
West Antarctica
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
dc.creator.none.fl_str_mv Reguero, Marcelo Alfredo
Gelfo, Javier Nicolás
López, Guillermo Marcos
Bond, Mariano
Abello, María Alejandra
Santillana, Sergio N.
Marenssi, Sergio Alfredo
author Reguero, Marcelo Alfredo
author_facet Reguero, Marcelo Alfredo
Gelfo, Javier Nicolás
López, Guillermo Marcos
Bond, Mariano
Abello, María Alejandra
Santillana, Sergio N.
Marenssi, Sergio Alfredo
author_role author
author2 Gelfo, Javier Nicolás
López, Guillermo Marcos
Bond, Mariano
Abello, María Alejandra
Santillana, Sergio N.
Marenssi, Sergio Alfredo
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Early Paleogene
Land Connection
South America
South American And Antarctic Native Ungulate
West Antarctica
topic Early Paleogene
Land Connection
South America
South American And Antarctic Native Ungulate
West Antarctica
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv 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. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Facultad de Ciencias Naturales y Museo, Universidad Nacional de la Plata; Argentina
Fil: Gelfo, Javier Nicolás. Facultad de Ciencias Naturales y Museo, Universidad Nacional de la Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: López, Guillermo Marcos. Facultad de Ciencias Naturales y Museo, Universidad Nacional de la Plata; Argentina
Fil: Bond, Mariano. Facultad de Ciencias Naturales y Museo, Universidad Nacional de la Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Abello, María Alejandra. Facultad de Ciencias Naturales y Museo, Universidad Nacional de la Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Santillana, Sergio N.. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina
Fil: Marenssi, Sergio Alfredo. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina
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.
publishDate 2014
dc.date.none.fl_str_mv 2014-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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://hdl.handle.net/11336/79923
Reguero, Marcelo Alfredo; Gelfo, Javier Nicolás; López, Guillermo Marcos; Bond, Mariano; Abello, María Alejandra; 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; Part B; 12-2014; 400-413
0921-8181
CONICET Digital
CONICET
url http://hdl.handle.net/11336/79923
identifier_str_mv Reguero, Marcelo Alfredo; Gelfo, Javier Nicolás; López, Guillermo Marcos; Bond, Mariano; Abello, María Alejandra; 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; Part B; 12-2014; 400-413
0921-8181
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.gloplacha.2014.07.016
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0921818114001507
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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