Revision of the Miocene caviomorph rodents from the Río Santa Cruz (Argentinean Patagonia)

Fossil rodents from the Río Santa Cruz (RSC) classic localities (Santa Cruz Formation, Early–Middle Miocene) are known by the works of F. Ameghino and W.B. Scott since the end of the 19th and beginning of the 20th centuries. These caviomorph rodents have not been comprehensively reviewed since then....

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Detalles Bibliográficos
Autores principales: Arnal, Michelle, Pérez, María Encarnación, Deschamps, Cecilia Marcela
Formato: Articulo
Lenguaje:Inglés
Publicado: 2019
Materias:
Paleontología
Santacrucian
Province of Santa Cruz
Hystricognathi
Taxonom
Systematics
Biostratigraphy
Evolution
Santacrucense
Provincia de Santa Cruz.
Taxonomía animal
Sistemática
Bioestratigrafía
Evolución
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/115997
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-115997
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Paleontología
Santacrucian
Province of Santa Cruz
Hystricognathi
Taxonom
Systematics
Biostratigraphy
Evolution
Santacrucense
Provincia de Santa Cruz.
Taxonomía animal
Sistemática
Bioestratigrafía
Evolución
spellingShingle Paleontología
Santacrucian
Province of Santa Cruz
Hystricognathi
Taxonom
Systematics
Biostratigraphy
Evolution
Santacrucense
Provincia de Santa Cruz.
Taxonomía animal
Sistemática
Bioestratigrafía
Evolución
Arnal, Michelle
Pérez, María Encarnación
Deschamps, Cecilia Marcela
Revision of the Miocene caviomorph rodents from the Río Santa Cruz (Argentinean Patagonia)
topic_facet Paleontología
Santacrucian
Province of Santa Cruz
Hystricognathi
Taxonom
Systematics
Biostratigraphy
Evolution
Santacrucense
Provincia de Santa Cruz.
Taxonomía animal
Sistemática
Bioestratigrafía
Evolución
description Fossil rodents from the Río Santa Cruz (RSC) classic localities (Santa Cruz Formation, Early–Middle Miocene) are known by the works of F. Ameghino and W.B. Scott since the end of the 19th and beginning of the 20th centuries. These caviomorph rodents have not been comprehensively reviewed since then. In this contribution, we studied new fossil specimens from the cliffs of the RSC (Province of Santa Cruz, Argentina) collected with accurate stratigraphic and geographic data during fieldtrips in 2013 and 2014. An increase in the caviomorph taxonomic richness is observed, based upon our taxonomic study of caviomorphs previously recorded in the RSC. Also, these fieldworks recovered for the first time several taxa previously found in other Santacrucian and even older Patagonian localities (Colhuehuapian, Early Miocene). As a general evolutionary pattern, we note an increase of derived euhypsodont taxa (Prolagostomus, Pliolagostomus, Schistomys, and Eocardia) in Segundas Barrancas Blancas (16.47–15.3 Ma). In addition, a taxonomic replacement of Phanomys by Schistomys is noted between Barrancas Blancas (17.21–16.3 Ma) and Segundas Barrancas Blancas, as well as a notably increase in the abundance of the large Perimys onustus in the latter locality. The present study provides a revision of the caviomorph systematics, and intends to be the starting point to understand the diversity (in all its aspects) and the evolution of this group during the Santacrucian, a major event in the South American mammalian history.
format Articulo
Articulo
author Arnal, Michelle
Pérez, María Encarnación
Deschamps, Cecilia Marcela
author_facet Arnal, Michelle
Pérez, María Encarnación
Deschamps, Cecilia Marcela
author_sort Arnal, Michelle
title Revision of the Miocene caviomorph rodents from the Río Santa Cruz (Argentinean Patagonia)
title_short Revision of the Miocene caviomorph rodents from the Río Santa Cruz (Argentinean Patagonia)
title_full Revision of the Miocene caviomorph rodents from the Río Santa Cruz (Argentinean Patagonia)
title_fullStr Revision of the Miocene caviomorph rodents from the Río Santa Cruz (Argentinean Patagonia)
title_full_unstemmed Revision of the Miocene caviomorph rodents from the Río Santa Cruz (Argentinean Patagonia)
title_sort revision of the miocene caviomorph rodents from the río santa cruz (argentinean patagonia)
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/115997
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