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
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/107574
Acceder
id SEDICI_c6b2c1eaa4192f1d4b7472e8abdf6f75
oai_identifier_str oai:sedici.unlp.edu.ar:10915/107574
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling 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:UNLP2025-10-15T11:15:57Zoai: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:13292025-10-15 11:15:57.479SEDICI (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
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/10915/107574
url http://sedici.unlp.edu.ar/handle/10915/107574
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/full/10.1080/02724634.2017.1352591
info:eu-repo/semantics/altIdentifier/issn/1937-2809
info:eu-repo/semantics/altIdentifier/doi/10.1080/02724634.2017.1352591
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
_version_ 1846064217623363584
score 13.22299

Publicaciones similares