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dc.contributor.author
Gelfo, Javier Nicolás
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dc.date.available
2024-05-10T11:27:32Z
dc.date.issued
2024-03
dc.identifier.citation
Gelfo, Javier Nicolás; Contributions to the knowledge of Antarctodon sobrali (Mammalia: Astrapotheria) from the Eocene of Antarctica; Science Press; Advance in Polar Science; 35; 3-2024; 48-62
dc.identifier.issn
1674-9928
dc.identifier.uri
http://hdl.handle.net/11336/235053
dc.description.abstract
The Astrapotheria constitutes one of the five orders of extinct South American native ungulates, with a fossil recordthat also extends to the Eocene of the Antarctic Peninsula. In contrast to the abundant specimens known for litopternSparnotheriodontidae and metatherians, astrapotheres are represented by scant remains assigned to the endemic Antarctodonsobrali and indeterminate astrapotheres, restricted to levels 35Cu0 and 35n of the Cucullaea I Allomember of the La MesetaFormation. The discovery of a lower molar assignable to this species in the Eocene levels of Seymour (Marambio) Island,enables a revision of the diagnosis and the homologies of the dental characters used to describe this taxon. A reanalysis of itsphylogenetic relationships reveals the nearly simultaneous presence of basal astrapotheres in the early Eocene of Itaboraí(Brazil), Patagonia, and West Antarctica. These taxa are characterized by lacking dental specializations usually associated withmore abrasive diets like terminal forms of Uruguaytheriinae and Astrapotheriinae. Antarctodon appears to have thrived on theAntarctic continent during the Early Eocene Climatic Optimum within the paleoclimatic context of a hot-house world. Unlikepresent conditions in Antarctica where no terrestrial mammals inhabit, the early Eocene climate was characterized by warmertemperatures and a biologically diverse environment rich in primary producers, dominated by Nothofagus forests, encompassingboth deciduous and evergreen forests, which supported a diverse assemblage of continental vertebrates.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Science Press
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ASTRAPOTHERIA
dc.subject
EOCENE
dc.subject
ANATARCTICA
dc.subject
LA MESETA FORMATION
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
Contributions to the knowledge of Antarctodon sobrali (Mammalia: Astrapotheria) from the Eocene 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
2024-05-08T11:21:14Z
dc.journal.volume
35
dc.journal.pagination
48-62
dc.journal.pais
China
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dc.description.fil
Fil: Gelfo, Javier Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina
dc.journal.title
Advance in Polar Science
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://aps.chinare.org.cn/EN/10.12429/j.advps.2023.0031
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.12429/j.advps.2023.0031
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