A new guinea pig (Rodentia, Caviomorpha) from northwestern Argentina: implications for the origin of the genus <i>Cavia</i>

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 diff...

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Detalles Bibliográficos
Autores principales: Candela, Adriana Magdalena, Bonini, Ricardo Adolfo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Ciencias Naturales
guinea pig
Cavia cabrerai
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/107574
https://www.tandfonline.com/doi/full/10.1080/02724634.2017.1352591
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-107574
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
guinea pig
Cavia cabrerai
spellingShingle Ciencias Naturales
guinea pig
Cavia cabrerai
Candela, Adriana Magdalena
Bonini, Ricardo Adolfo
A new guinea pig (Rodentia, Caviomorpha) from northwestern Argentina: implications for the origin of the genus <i>Cavia</i>
topic_facet Ciencias Naturales
guinea pig
Cavia cabrerai
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.
format Articulo
Articulo
author Candela, Adriana Magdalena
Bonini, Ricardo Adolfo
author_facet Candela, Adriana Magdalena
Bonini, Ricardo Adolfo
author_sort Candela, Adriana Magdalena
title A new guinea pig (Rodentia, Caviomorpha) from northwestern Argentina: implications for the origin of the genus <i>Cavia</i>
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 new guinea pig (rodentia, caviomorpha) from northwestern argentina: implications for the origin of the genus <i>cavia</i>
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/107574
https://www.tandfonline.com/doi/full/10.1080/02724634.2017.1352591
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