The largest known bear, Arctotherium angustidens, from the early Pleistocene pampeam region of Argentina: with a discussion of size and diet trends in bears
- Autores
- Schubert, Blaine W.; Soibelzon, Leopoldo Héctor
- Año de publicación
- 2011
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The South American giant short-faced bear (Arctotherium angustidens Gervais and Ameghino, 1880) is one of five described Arctotherium species endemic to South America and it is known for being the earliest, largest, and most carnivorous member of the genus. Here we report an extraordinarily large A. angustidens individual exhumed from Ensenadan sediments (early to middle Pleistocene) at Buenos Aires Province, Argentina. Based on overall size, degree of epiphyseal fusion, and pathologies, this bear was an old-aged male that sustained serious injuries during life. Body mass of the bear is estimated and compared to other ursid species based on a series of allometric equations. To our knowledge, this specimen now represents the largest bear ever recorded. In light of this discovery, we discuss the evolution of body size in Arctotherium (from large-to-small) and compare this to bears that exhibited different evolutionary trajectories. We suggest that the larger size and more carnivorous nature of A. angustidens, compared to later members of the genus, may reflect the relative lack of other large carnivores and abundance of herbivores in South America just after the Great American Biotic Interchange
Museo de La Plata - Materia
-
Paleontología
Ciencias Naturales
oso
Ensenada, Argentina
Tamaño Corporal
early Pleistocene
Carnívoros
Arctotherium angustidens - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc/3.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/5360
Ver los metadatos del registro completo
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The largest known bear, Arctotherium angustidens, from the early Pleistocene pampeam region of Argentina: with a discussion of size and diet trends in bearsSchubert, Blaine W.Soibelzon, Leopoldo HéctorPaleontologíaCiencias NaturalesosoEnsenada, ArgentinaTamaño Corporalearly PleistoceneCarnívorosArctotherium angustidensThe South American giant short-faced bear (Arctotherium angustidens Gervais and Ameghino, 1880) is one of five described Arctotherium species endemic to South America and it is known for being the earliest, largest, and most carnivorous member of the genus. Here we report an extraordinarily large A. angustidens individual exhumed from Ensenadan sediments (early to middle Pleistocene) at Buenos Aires Province, Argentina. Based on overall size, degree of epiphyseal fusion, and pathologies, this bear was an old-aged male that sustained serious injuries during life. Body mass of the bear is estimated and compared to other ursid species based on a series of allometric equations. To our knowledge, this specimen now represents the largest bear ever recorded. In light of this discovery, we discuss the evolution of body size in Arctotherium (from large-to-small) and compare this to bears that exhibited different evolutionary trajectories. We suggest that the larger size and more carnivorous nature of A. angustidens, compared to later members of the genus, may reflect the relative lack of other large carnivores and abundance of herbivores in South America just after the Great American Biotic InterchangeMuseo de La Plata2011info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf69-75http://sedici.unlp.edu.ar/handle/10915/5360enginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc/3.0/Creative Commons Attribution-NonCommercial 3.0 Unported (CC BY-NC 3.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-03T10:22:26Zoai:sedici.unlp.edu.ar:10915/5360Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-03 10:22:27.267SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
The largest known bear, Arctotherium angustidens, from the early Pleistocene pampeam region of Argentina: with a discussion of size and diet trends in bears |
title |
The largest known bear, Arctotherium angustidens, from the early Pleistocene pampeam region of Argentina: with a discussion of size and diet trends in bears |
spellingShingle |
The largest known bear, Arctotherium angustidens, from the early Pleistocene pampeam region of Argentina: with a discussion of size and diet trends in bears Schubert, Blaine W. Paleontología Ciencias Naturales oso Ensenada, Argentina Tamaño Corporal early Pleistocene Carnívoros Arctotherium angustidens |
title_short |
The largest known bear, Arctotherium angustidens, from the early Pleistocene pampeam region of Argentina: with a discussion of size and diet trends in bears |
title_full |
The largest known bear, Arctotherium angustidens, from the early Pleistocene pampeam region of Argentina: with a discussion of size and diet trends in bears |
title_fullStr |
The largest known bear, Arctotherium angustidens, from the early Pleistocene pampeam region of Argentina: with a discussion of size and diet trends in bears |
title_full_unstemmed |
The largest known bear, Arctotherium angustidens, from the early Pleistocene pampeam region of Argentina: with a discussion of size and diet trends in bears |
title_sort |
The largest known bear, Arctotherium angustidens, from the early Pleistocene pampeam region of Argentina: with a discussion of size and diet trends in bears |
dc.creator.none.fl_str_mv |
Schubert, Blaine W. Soibelzon, Leopoldo Héctor |
author |
Schubert, Blaine W. |
author_facet |
Schubert, Blaine W. Soibelzon, Leopoldo Héctor |
author_role |
author |
author2 |
Soibelzon, Leopoldo Héctor |
author2_role |
author |
dc.subject.none.fl_str_mv |
Paleontología Ciencias Naturales oso Ensenada, Argentina Tamaño Corporal early Pleistocene Carnívoros Arctotherium angustidens |
topic |
Paleontología Ciencias Naturales oso Ensenada, Argentina Tamaño Corporal early Pleistocene Carnívoros Arctotherium angustidens |
dc.description.none.fl_txt_mv |
The South American giant short-faced bear (Arctotherium angustidens Gervais and Ameghino, 1880) is one of five described Arctotherium species endemic to South America and it is known for being the earliest, largest, and most carnivorous member of the genus. Here we report an extraordinarily large A. angustidens individual exhumed from Ensenadan sediments (early to middle Pleistocene) at Buenos Aires Province, Argentina. Based on overall size, degree of epiphyseal fusion, and pathologies, this bear was an old-aged male that sustained serious injuries during life. Body mass of the bear is estimated and compared to other ursid species based on a series of allometric equations. To our knowledge, this specimen now represents the largest bear ever recorded. In light of this discovery, we discuss the evolution of body size in Arctotherium (from large-to-small) and compare this to bears that exhibited different evolutionary trajectories. We suggest that the larger size and more carnivorous nature of A. angustidens, compared to later members of the genus, may reflect the relative lack of other large carnivores and abundance of herbivores in South America just after the Great American Biotic Interchange Museo de La Plata |
description |
The South American giant short-faced bear (Arctotherium angustidens Gervais and Ameghino, 1880) is one of five described Arctotherium species endemic to South America and it is known for being the earliest, largest, and most carnivorous member of the genus. Here we report an extraordinarily large A. angustidens individual exhumed from Ensenadan sediments (early to middle Pleistocene) at Buenos Aires Province, Argentina. Based on overall size, degree of epiphyseal fusion, and pathologies, this bear was an old-aged male that sustained serious injuries during life. Body mass of the bear is estimated and compared to other ursid species based on a series of allometric equations. To our knowledge, this specimen now represents the largest bear ever recorded. In light of this discovery, we discuss the evolution of body size in Arctotherium (from large-to-small) and compare this to bears that exhibited different evolutionary trajectories. We suggest that the larger size and more carnivorous nature of A. angustidens, compared to later members of the genus, may reflect the relative lack of other large carnivores and abundance of herbivores in South America just after the Great American Biotic Interchange |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://sedici.unlp.edu.ar/handle/10915/5360 |
url |
http://sedici.unlp.edu.ar/handle/10915/5360 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc/3.0/ Creative Commons Attribution-NonCommercial 3.0 Unported (CC BY-NC 3.0) |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
http://creativecommons.org/licenses/by-nc/3.0/ Creative Commons Attribution-NonCommercial 3.0 Unported (CC BY-NC 3.0) |
dc.format.none.fl_str_mv |
application/pdf 69-75 |
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