The fossil record of the short-faced bears (Ursidae, Tremarctinae) from Venezuela. Systematic, biogeographic, and paleoecological implications

The first record of a Tremarctinae bear in Venezuela was made by Royo y GÓMEZin 1960. Since then, three new specimens from two localities have been collected but not reported. The purpose of this contribution is to discuss the taxonomy, biostratigraphy, and biogeographic implications of these record...

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Autores principales: Rincón, Ascanio D., Soibelzon, Leopoldo Héctor
Formato: Articulo
Lenguaje:Inglés
Publicado: 2007
Materias:
Paleontología
Ciencias Naturales
Ursidae
Venezuela
Tremarctinae; Arctotherium wingei;, Muaco; Guáchara Cave; Pleistocene
Fósiles
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/5368
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-5368
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
Ursidae
Venezuela
Tremarctinae; Arctotherium wingei;, Muaco; Guáchara Cave; Pleistocene
Fósiles
spellingShingle Paleontología
Ciencias Naturales
Ursidae
Venezuela
Tremarctinae; Arctotherium wingei;, Muaco; Guáchara Cave; Pleistocene
Fósiles
Rincón, Ascanio D.
Soibelzon, Leopoldo Héctor
The fossil record of the short-faced bears (Ursidae, Tremarctinae) from Venezuela. Systematic, biogeographic, and paleoecological implications
topic_facet Paleontología
Ciencias Naturales
Ursidae
Venezuela
Tremarctinae; Arctotherium wingei;, Muaco; Guáchara Cave; Pleistocene
Fósiles
description The first record of a Tremarctinae bear in Venezuela was made by Royo y GÓMEZin 1960. Since then, three new specimens from two localities have been collected but not reported. The purpose of this contribution is to discuss the taxonomy, biostratigraphy, and biogeographic implications of these records. The bear genera included in the subfamily Tremarctinae are distributed exclusively in America. In South America only one fossil genus is recorded, Arctotherium, comprising five species: A. angustidens, restricted to the Ensenadan (early - middle Pleistocene) of Argentina and Bolivia; A. vetustum, recorded only in the Bonaerian (middle Pleistocene) of Brazil and Argentina; two Bonaerian and Lujanian (middle Pleistocene - early Holocene) species, A. bonariense (recorded only in Argentina), andA. tarijense (occurring in Argentina, Bolivia, Uruguay and Chile); and A. wingei, recorded with certainty only in the Lujanian (late Pleistocene- early Holocene).After the present study we conclude that (1) A. wingei is the only species recorded in Venezuela, and (2) all known specimens have Lujanian pravenance. Outside Venezuela, this species is recorded from Bolivia and Brazil but without precise stratigraphic data. Although A. wingei is one of the most plesiomorphic Arctotherium species, it has not been recorded in sediments older than late Pleistocene. This could be interpreted as species preference for low latitude tropical or subtropical enviranments, which are poorly represented in early Pleistocene continental sediments.
format Articulo
Articulo
author Rincón, Ascanio D.
Soibelzon, Leopoldo Héctor
author_facet Rincón, Ascanio D.
Soibelzon, Leopoldo Héctor
author_sort Rincón, Ascanio D.
title The fossil record of the short-faced bears (Ursidae, Tremarctinae) from Venezuela. Systematic, biogeographic, and paleoecological implications
title_short The fossil record of the short-faced bears (Ursidae, Tremarctinae) from Venezuela. Systematic, biogeographic, and paleoecological implications
title_full The fossil record of the short-faced bears (Ursidae, Tremarctinae) from Venezuela. Systematic, biogeographic, and paleoecological implications
title_fullStr The fossil record of the short-faced bears (Ursidae, Tremarctinae) from Venezuela. Systematic, biogeographic, and paleoecological implications
title_full_unstemmed The fossil record of the short-faced bears (Ursidae, Tremarctinae) from Venezuela. Systematic, biogeographic, and paleoecological implications
title_sort fossil record of the short-faced bears (ursidae, tremarctinae) from venezuela. systematic, biogeographic, and paleoecological implications
publishDate 2007
url http://sedici.unlp.edu.ar/handle/10915/5368
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