The fossil record of South American short-faced bears (Ursidae, Tremarctinae)

The present study includes a review of the geographic and stratigraphic distribution of short-faced bears (Ursidae, Tremarctinae) in South America. In addition, the authors discuss biogeographic hypotheses regarding the origin of South American tremarctines. The Tremarctinae subfamily is distributed...

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Detalles Bibliográficos
Autores principales: Bond, Mariano, Tonni, Eduardo Pedro, Soibelzon, Leopoldo Héctor
Formato: Articulo
Lenguaje:Inglés
Publicado: 2005
Materias:
Paleontología
Ciencias Naturales
biostratigraphy; short-faced bears
oso
Ursidae
Sudamérica
Fósiles
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/5366
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-5366
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Paleontología
Ciencias Naturales
biostratigraphy; short-faced bears
oso
Ursidae
Sudamérica
Fósiles
spellingShingle Paleontología
Ciencias Naturales
biostratigraphy; short-faced bears
oso
Ursidae
Sudamérica
Fósiles
Bond, Mariano
Tonni, Eduardo Pedro
Soibelzon, Leopoldo Héctor
The fossil record of South American short-faced bears (Ursidae, Tremarctinae)
topic_facet Paleontología
Ciencias Naturales
biostratigraphy; short-faced bears
oso
Ursidae
Sudamérica
Fósiles
description The present study includes a review of the geographic and stratigraphic distribution of short-faced bears (Ursidae, Tremarctinae) in South America. In addition, the authors discuss biogeographic hypotheses regarding the origin of South American tremarctines. The Tremarctinae subfamily is distributed exclusively in America, from Alaska to southern Patagonia. Its biochron comprises the temporal lapse between Late Miocene and recent times; the first record of Tremarctinae in North America corresponds to the Hemphillian and the last to the Rancholabrean. In South America, the first record corresponds to the Ensenadan. In the present day, it corresponds to the only living tremarctine, the "Andean Bear," but short-faced bears became extinct during the early Holocene. The extinction of short-faced bears in North and South America appears to have been approximately synchronous. Finally, the fossil record in South America indicates species turnover between the Ensenadan and Bonaerian, during which time the giant species Arctotherium angustidens was replaced by Arctotherium tarijense, Arctotherium bonaeriense, and Arctotherium vetustum (and probably Arctotherium wingei).
format Articulo
Articulo
author Bond, Mariano
Tonni, Eduardo Pedro
Soibelzon, Leopoldo Héctor
author_facet Bond, Mariano
Tonni, Eduardo Pedro
Soibelzon, Leopoldo Héctor
author_sort Bond, Mariano
title The fossil record of South American short-faced bears (Ursidae, Tremarctinae)
title_short The fossil record of South American short-faced bears (Ursidae, Tremarctinae)
title_full The fossil record of South American short-faced bears (Ursidae, Tremarctinae)
title_fullStr The fossil record of South American short-faced bears (Ursidae, Tremarctinae)
title_full_unstemmed The fossil record of South American short-faced bears (Ursidae, Tremarctinae)
title_sort fossil record of south american short-faced bears (ursidae, tremarctinae)
publishDate 2005
url http://sedici.unlp.edu.ar/handle/10915/5366
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