Main pathways in the evolution of the Paleogene Antarctic Sphenisciformes
The Seymour Island fossil penguins from the Cross Valley and La Meseta Formations, Seymour Island (James Ross Basin; late Paleocene, and Eocene/?early Oligocene respectively) constitute the most complete stratigraphic records of the group known in the world. In addition to the geographic and stratig...
Published in: | Journal of South American Earth Sciences |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
|
Subjects: | |
Online Access: | http://hdl.handle.net/11336/22263 |
id |
ftconicet:oai:ri.conicet.gov.ar:11336/22263 |
---|---|
record_format |
openpolar |
spelling |
ftconicet:oai:ri.conicet.gov.ar:11336/22263 2023-10-09T21:45:08+02:00 Main pathways in the evolution of the Paleogene Antarctic Sphenisciformes Acosta Hospitaleche, Carolina Ileana Alicia Reguero, Marcelo Alfredo Scarano, Alejo Carlos application/pdf http://hdl.handle.net/11336/22263 eng eng Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2013.01.006 info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0895981113000230 http://hdl.handle.net/11336/22263 Acosta Hospitaleche, Carolina Ileana Alicia; Reguero, Marcelo Alfredo; Scarano, Alejo Carlos; Main pathways in the evolution of the Paleogene Antarctic Sphenisciformes; Elsevier; Journal of South American Earth Sciences; 43; 4-2013; 101-111 0895-9811 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Sphenisciformes Biodiversity Paleogene Antarctica Weddellian Current 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.jsames.2013.01.006 2023-09-24T18:47:55Z The Seymour Island fossil penguins from the Cross Valley and La Meseta Formations, Seymour Island (James Ross Basin; late Paleocene, and Eocene/?early Oligocene respectively) constitute the most complete stratigraphic records of the group known in the world. In addition to the geographic and stratigraphic thoroughness of the collected fossil remains, they offer a unique opportunity to the understanding of the major evolutionary patterns of the Sphenisciformes. We analyze their taxonomic diversity and abundance in La Meseta Formation, in a context of the spread patterns of the Paleogene penguins in relationship to the Antarctic Circumpolar Current incidence. Our data suggest that the highest diversity and geographical distribution (Antarctica, South America and Australasia) in the Late Eocene were linked to water-cooling events and the opening of the Drake Passage. However, the first divergence of the group is documented in the Early Eocene. This fact supports that a marine dispersion of the Weddellian penguins to other continents occurs when there was a shallow and warm ocean current circulation (Weddellian Current) flowing along the western margin of West Antarctica and South America The phylogenetic analysis and the recent discoveries in the Eocene of Chile and Peru support the hypothesis that establishes one of the way for the dispersion of the Weddellian species from the Peninsula Antarctica was the Pacific coast during the early Eocene. Fil: Acosta Hospitaleche, Carolina Ileana Alicia. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Reguero, Marcelo Alfredo. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Scarano, Alejo Carlos. Universidad Nacional de Avellaneda; Argentina. Consejo Nacional de Investigaciones ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Drake Passage Seymour Island West Antarctica CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Acosta ENVELOPE(-62.050,-62.050,-64.700,-64.700) Alicia ENVELOPE(-63.483,-63.483,-64.833,-64.833) Antarctic Argentina Avellaneda ENVELOPE(-65.500,-65.500,-65.433,-65.433) Cross Valley ENVELOPE(-56.683,-56.683,-64.258,-64.258) Drake Passage Pacific Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Seymour Island ENVELOPE(-56.750,-56.750,-64.283,-64.283) The Antarctic West Antarctica Journal of South American Earth Sciences 43 101 111 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
Sphenisciformes Biodiversity Paleogene Antarctica Weddellian Current https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
Sphenisciformes Biodiversity Paleogene Antarctica Weddellian Current https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Acosta Hospitaleche, Carolina Ileana Alicia Reguero, Marcelo Alfredo Scarano, Alejo Carlos Main pathways in the evolution of the Paleogene Antarctic Sphenisciformes |
topic_facet |
Sphenisciformes Biodiversity Paleogene Antarctica Weddellian Current https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
The Seymour Island fossil penguins from the Cross Valley and La Meseta Formations, Seymour Island (James Ross Basin; late Paleocene, and Eocene/?early Oligocene respectively) constitute the most complete stratigraphic records of the group known in the world. In addition to the geographic and stratigraphic thoroughness of the collected fossil remains, they offer a unique opportunity to the understanding of the major evolutionary patterns of the Sphenisciformes. We analyze their taxonomic diversity and abundance in La Meseta Formation, in a context of the spread patterns of the Paleogene penguins in relationship to the Antarctic Circumpolar Current incidence. Our data suggest that the highest diversity and geographical distribution (Antarctica, South America and Australasia) in the Late Eocene were linked to water-cooling events and the opening of the Drake Passage. However, the first divergence of the group is documented in the Early Eocene. This fact supports that a marine dispersion of the Weddellian penguins to other continents occurs when there was a shallow and warm ocean current circulation (Weddellian Current) flowing along the western margin of West Antarctica and South America The phylogenetic analysis and the recent discoveries in the Eocene of Chile and Peru support the hypothesis that establishes one of the way for the dispersion of the Weddellian species from the Peninsula Antarctica was the Pacific coast during the early Eocene. Fil: Acosta Hospitaleche, Carolina Ileana Alicia. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Reguero, Marcelo Alfredo. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Scarano, Alejo Carlos. Universidad Nacional de Avellaneda; Argentina. Consejo Nacional de Investigaciones ... |
format |
Article in Journal/Newspaper |
author |
Acosta Hospitaleche, Carolina Ileana Alicia Reguero, Marcelo Alfredo Scarano, Alejo Carlos |
author_facet |
Acosta Hospitaleche, Carolina Ileana Alicia Reguero, Marcelo Alfredo Scarano, Alejo Carlos |
author_sort |
Acosta Hospitaleche, Carolina Ileana Alicia |
title |
Main pathways in the evolution of the Paleogene Antarctic Sphenisciformes |
title_short |
Main pathways in the evolution of the Paleogene Antarctic Sphenisciformes |
title_full |
Main pathways in the evolution of the Paleogene Antarctic Sphenisciformes |
title_fullStr |
Main pathways in the evolution of the Paleogene Antarctic Sphenisciformes |
title_full_unstemmed |
Main pathways in the evolution of the Paleogene Antarctic Sphenisciformes |
title_sort |
main pathways in the evolution of the paleogene antarctic sphenisciformes |
publisher |
Elsevier |
url |
http://hdl.handle.net/11336/22263 |
long_lat |
ENVELOPE(-62.050,-62.050,-64.700,-64.700) ENVELOPE(-63.483,-63.483,-64.833,-64.833) ENVELOPE(-65.500,-65.500,-65.433,-65.433) ENVELOPE(-56.683,-56.683,-64.258,-64.258) ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-56.750,-56.750,-64.283,-64.283) |
geographic |
Acosta Alicia Antarctic Argentina Avellaneda Cross Valley Drake Passage Pacific Seymour Seymour Island The Antarctic West Antarctica |
geographic_facet |
Acosta Alicia Antarctic Argentina Avellaneda Cross Valley Drake Passage Pacific Seymour Seymour Island The Antarctic West Antarctica |
genre |
Antarc* Antarctic Antarctica Drake Passage Seymour Island West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Drake Passage Seymour Island West Antarctica |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2013.01.006 info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0895981113000230 http://hdl.handle.net/11336/22263 Acosta Hospitaleche, Carolina Ileana Alicia; Reguero, Marcelo Alfredo; Scarano, Alejo Carlos; Main pathways in the evolution of the Paleogene Antarctic Sphenisciformes; Elsevier; Journal of South American Earth Sciences; 43; 4-2013; 101-111 0895-9811 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.jsames.2013.01.006 |
container_title |
Journal of South American Earth Sciences |
container_volume |
43 |
container_start_page |
101 |
op_container_end_page |
111 |
_version_ |
1779316100523098112 |