A new guinea pig (Rodentia, Caviomorpha) from northwestern Argentina: implications for the origin of the genus <i>Cavia</i>
- Autores
- Candela, Adriana Magdalena; Bonini, Ricardo Adolfo
- Año de publicación
- 2017
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We describe a new caviomorph rodent, Cavia cabrerai, sp. nov. (Caviidae, Caviinae), from the upper levels of Andalhuala Formation (San Fernando Norte locality, Catamarca Province, northwestern Argentina), which represents the oldest fossil record of the genus. The new species differs from extant and extinct species of Cavia by a unique combination of characters: large size, proportionally anteroposteriorly elongated molars, slightly anteroposteriorly compressed prisms, relatively shallow primary lingual flexids, abundant cement in the lingual flexids, and anterolingual widening of the second crests of cheek teeth. A phylogenetic analysis indicates that Cavia cabrerai, sp. nov., is the sister taxon of extant Cavia species and displays dental characters more plesiomorphic than the latter. Some characters of C. cabrerai, sp. nov., namely, compression of prisms and depth of flexids, are morphologically intermediate between the related extinct Caviinae Palaeocavia and the extant species of Cavia. An ash bed dated at 4.72 ± 0.08 Ma that overlies the fossiliferous level of the new material supports the presence of Cavia close to the Miocene-Pliocene boundary. The origin of Cavia may have been triggered by the expansion of relatively open and arid environments that arose near the Miocene-Pliocene boundary.
Facultad de Ciencias Naturales y Museo - Materia
-
Ciencias Naturales
guinea pig
Cavia cabrerai - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/107574
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A new guinea pig (Rodentia, Caviomorpha) from northwestern Argentina: implications for the origin of the genus <i>Cavia</i>Candela, Adriana MagdalenaBonini, Ricardo AdolfoCiencias Naturalesguinea pigCavia cabreraiWe describe a new caviomorph rodent, <i>Cavia cabrerai</i>, sp. nov. (Caviidae, Caviinae), from the upper levels of Andalhuala Formation (San Fernando Norte locality, Catamarca Province, northwestern Argentina), which represents the oldest fossil record of the genus. The new species differs from extant and extinct species of <i>Cavia</i> by a unique combination of characters: large size, proportionally anteroposteriorly elongated molars, slightly anteroposteriorly compressed prisms, relatively shallow primary lingual flexids, abundant cement in the lingual flexids, and anterolingual widening of the second crests of cheek teeth. A phylogenetic analysis indicates that <i>Cavia cabrerai</i>, sp. nov., is the sister taxon of extant <i>Cavia</i> species and displays dental characters more plesiomorphic than the latter. Some characters of <i>C. cabrerai</i>, sp. nov., namely, compression of prisms and depth of flexids, are morphologically intermediate between the related extinct Caviinae <i>Palaeocavia</i> and the extant species of <i>Cavia</i>. An ash bed dated at 4.72 ± 0.08 Ma that overlies the fossiliferous level of the new material supports the presence of <i>Cavia</i> close to the Miocene-Pliocene boundary. The origin of <i>Cavia</i> may have been triggered by the expansion of relatively open and arid environments that arose near the Miocene-Pliocene boundary.Facultad de Ciencias Naturales y Museo2017info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/107574enginfo:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/full/10.1080/02724634.2017.1352591info:eu-repo/semantics/altIdentifier/issn/1937-2809info:eu-repo/semantics/altIdentifier/doi/10.1080/02724634.2017.1352591info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:24:02Zoai:sedici.unlp.edu.ar:10915/107574Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:24:03.038SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
A new guinea pig (Rodentia, Caviomorpha) from northwestern Argentina: implications for the origin of the genus <i>Cavia</i> |
title |
A new guinea pig (Rodentia, Caviomorpha) from northwestern Argentina: implications for the origin of the genus <i>Cavia</i> |
spellingShingle |
A new guinea pig (Rodentia, Caviomorpha) from northwestern Argentina: implications for the origin of the genus <i>Cavia</i> Candela, Adriana Magdalena Ciencias Naturales guinea pig Cavia cabrerai |
title_short |
A new guinea pig (Rodentia, Caviomorpha) from northwestern Argentina: implications for the origin of the genus <i>Cavia</i> |
title_full |
A new guinea pig (Rodentia, Caviomorpha) from northwestern Argentina: implications for the origin of the genus <i>Cavia</i> |
title_fullStr |
A new guinea pig (Rodentia, Caviomorpha) from northwestern Argentina: implications for the origin of the genus <i>Cavia</i> |
title_full_unstemmed |
A new guinea pig (Rodentia, Caviomorpha) from northwestern Argentina: implications for the origin of the genus <i>Cavia</i> |
title_sort |
A new guinea pig (Rodentia, Caviomorpha) from northwestern Argentina: implications for the origin of the genus <i>Cavia</i> |
dc.creator.none.fl_str_mv |
Candela, Adriana Magdalena Bonini, Ricardo Adolfo |
author |
Candela, Adriana Magdalena |
author_facet |
Candela, Adriana Magdalena Bonini, Ricardo Adolfo |
author_role |
author |
author2 |
Bonini, Ricardo Adolfo |
author2_role |
author |
dc.subject.none.fl_str_mv |
Ciencias Naturales guinea pig Cavia cabrerai |
topic |
Ciencias Naturales guinea pig Cavia cabrerai |
dc.description.none.fl_txt_mv |
We describe a new caviomorph rodent, <i>Cavia cabrerai</i>, sp. nov. (Caviidae, Caviinae), from the upper levels of Andalhuala Formation (San Fernando Norte locality, Catamarca Province, northwestern Argentina), which represents the oldest fossil record of the genus. The new species differs from extant and extinct species of <i>Cavia</i> by a unique combination of characters: large size, proportionally anteroposteriorly elongated molars, slightly anteroposteriorly compressed prisms, relatively shallow primary lingual flexids, abundant cement in the lingual flexids, and anterolingual widening of the second crests of cheek teeth. A phylogenetic analysis indicates that <i>Cavia cabrerai</i>, sp. nov., is the sister taxon of extant <i>Cavia</i> species and displays dental characters more plesiomorphic than the latter. Some characters of <i>C. cabrerai</i>, sp. nov., namely, compression of prisms and depth of flexids, are morphologically intermediate between the related extinct Caviinae <i>Palaeocavia</i> and the extant species of <i>Cavia</i>. An ash bed dated at 4.72 ± 0.08 Ma that overlies the fossiliferous level of the new material supports the presence of <i>Cavia</i> close to the Miocene-Pliocene boundary. The origin of <i>Cavia</i> may have been triggered by the expansion of relatively open and arid environments that arose near the Miocene-Pliocene boundary. Facultad de Ciencias Naturales y Museo |
description |
We describe a new caviomorph rodent, <i>Cavia cabrerai</i>, sp. nov. (Caviidae, Caviinae), from the upper levels of Andalhuala Formation (San Fernando Norte locality, Catamarca Province, northwestern Argentina), which represents the oldest fossil record of the genus. The new species differs from extant and extinct species of <i>Cavia</i> by a unique combination of characters: large size, proportionally anteroposteriorly elongated molars, slightly anteroposteriorly compressed prisms, relatively shallow primary lingual flexids, abundant cement in the lingual flexids, and anterolingual widening of the second crests of cheek teeth. A phylogenetic analysis indicates that <i>Cavia cabrerai</i>, sp. nov., is the sister taxon of extant <i>Cavia</i> species and displays dental characters more plesiomorphic than the latter. Some characters of <i>C. cabrerai</i>, sp. nov., namely, compression of prisms and depth of flexids, are morphologically intermediate between the related extinct Caviinae <i>Palaeocavia</i> and the extant species of <i>Cavia</i>. An ash bed dated at 4.72 ± 0.08 Ma that overlies the fossiliferous level of the new material supports the presence of <i>Cavia</i> close to the Miocene-Pliocene boundary. The origin of <i>Cavia</i> may have been triggered by the expansion of relatively open and arid environments that arose near the Miocene-Pliocene boundary. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017 |
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http://sedici.unlp.edu.ar/handle/10915/107574 |
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eng |
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eng |
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