Revisión sistemática de los Tremarctinae (Carnivora, Ursidae) fósiles de América del Sur

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The systematics, and the geographic and stratigraphic distribution of the South American fossil taxa of Tremarctinae (Carnivora, Ursidae) are reviewed and discussed. New diagnostic characters are proposed, in order to support each taxon. Only one genus (Arctotherium), of the Pleistocene and Lower Ho...

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Autor principal: Soibelzon, Leopoldo Héctor
Formato: Articulo
Lenguaje:Español
Publicado: 2004
Materias:
Paleontología
Ciencias Naturales
Tremarctinae; carnivora; Peistocene
Grupos de Población Animal
Sudamérica
Ursidae
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/5359
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-5359
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Español
topic Paleontología
Ciencias Naturales
Tremarctinae; carnivora; Peistocene
Grupos de Población Animal
Sudamérica
Ursidae
spellingShingle Paleontología
Ciencias Naturales
Tremarctinae; carnivora; Peistocene
Grupos de Población Animal
Sudamérica
Ursidae
Soibelzon, Leopoldo Héctor
Revisión sistemática de los Tremarctinae (Carnivora, Ursidae) fósiles de América del Sur
topic_facet Paleontología
Ciencias Naturales
Tremarctinae; carnivora; Peistocene
Grupos de Población Animal
Sudamérica
Ursidae
description The systematics, and the geographic and stratigraphic distribution of the South American fossil taxa of Tremarctinae (Carnivora, Ursidae) are reviewed and discussed. New diagnostic characters are proposed, in order to support each taxon. Only one genus (Arctotherium), of the Pleistocene and Lower Holocene of South America, is recognized, with five species: A. vetustum Ameghino, A. wingei Ameghino, A. angustidens Gervais & Ameghino, A. bonariense (Gervais), and A. tarijense Ameghino. Arctotherium is recorded from the Ensenadan (Upper Pliocene to Middle Pleistocene) to the Lujanian (Upper Pleistocene to Lower Holocene) in Venezuela, Brazil, Bolivia, Uruguay, Argentina, and Chile. A. vetustum is recorded in the Bonaerian (Middle Pleistocene) in Argentina; A. wingei in the Lujanian in Venezuela, Bolivia and Brazil; A. angustidens in the Ensenadan of Bolivia and Argentina; A. bonariense in the Bonaerian and Lujanian of Argentina and A. tarijense in the Bonaerian and Lujanian of Uruguay, Argentina, and Chile. Arctotherium is characterized by ten features: the post palatine margin slightly overpasses the distal end of M2, P1-3 compressed in a triangular arrangement, protocone reduced or absent in P4, length between canine and P4 less than P4 mesio-distal length, metastyle reduced or absent in M1, M2 wider than in other ursids, p4 crown ellipsoidal shaped, m1 trigonid wider than in other ursids, m2 crown kidney shaped, m3 crown sub circulate shaped.
format Articulo
Articulo
author Soibelzon, Leopoldo Héctor
author_facet Soibelzon, Leopoldo Héctor
author_sort Soibelzon, Leopoldo Héctor
title Revisión sistemática de los Tremarctinae (Carnivora, Ursidae) fósiles de América del Sur
title_short Revisión sistemática de los Tremarctinae (Carnivora, Ursidae) fósiles de América del Sur
title_full Revisión sistemática de los Tremarctinae (Carnivora, Ursidae) fósiles de América del Sur
title_fullStr Revisión sistemática de los Tremarctinae (Carnivora, Ursidae) fósiles de América del Sur
title_full_unstemmed Revisión sistemática de los Tremarctinae (Carnivora, Ursidae) fósiles de América del Sur
title_sort revisión sistemática de los tremarctinae (carnivora, ursidae) fósiles de américa del sur
publishDate 2004
url http://sedici.unlp.edu.ar/handle/10915/5359
work_keys_str_mv AT soibelzonleopoldohector revisionsistematicadelostremarctinaecarnivoraursidaefosilesdeamericadelsur
bdutipo_str Repositorios
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