New radiometric 40Ar–39Ar dates and faunistic analyses refine evolutionary dynamics of Neogene vertebrate assemblages in southern South America

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The vertebrate fossil record of the Pampean Region of Argentina occupies an important place in South American vertebrate paleontology. An abundance of localities has long been the main basis for constructing the chronostratigraphical/geochronological scale for the late Neogene–Quaternary of South Am...

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Autores principales: Prevosti, Francisco Juan, Romano Muñoz, Cristo Omar, Forasiepi, Analia Marta, Hemming, Sidney, Bonini, Ricardo Adolfo, Candela, Adriana Magdalena, Cerdeño Serrano, Maria Esperanza, Madozzo Jaén, María Carolina, Ortiz, Pablo Edmundo, Pujos, François Roger Francis, Rasia, Luciano Luis, Schmidt, Gabriela Ines, Taglioretti, Matias Luciano, Macphee, Ross Douglas Earle, Pardiñas, Ulises Francisco J.
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: Nature 2021
Materias:
Radiometric 40Ar-39Ar dates
Mammalian fauna
Neogene
South America
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
Acceso en línea:http://hdl.handle.net/11336/153289
http://suquia.ffyh.unc.edu.ar/handle/11336/153289
Aporte de:
Suquía - Instituto de Antropología de Córdoba (IDACOR, CONICET y UNC) de Universidad Nacional de Córdoba
id I10-R181-11336-153289
record_format dspace
institution Universidad Nacional de Córdoba
institution_str I-10
repository_str R-181
collection Suquía - Instituto de Antropología de Córdoba (IDACOR, CONICET y UNC)
language Inglés
topic Radiometric 40Ar-39Ar dates
Mammalian fauna
Neogene
South America
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
spellingShingle Radiometric 40Ar-39Ar dates
Mammalian fauna
Neogene
South America
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
Prevosti, Francisco Juan
Romano Muñoz, Cristo Omar
Forasiepi, Analia Marta
Hemming, Sidney
Bonini, Ricardo Adolfo
Candela, Adriana Magdalena
Cerdeño Serrano, Maria Esperanza
Madozzo Jaén, María Carolina
Ortiz, Pablo Edmundo
Pujos, François Roger Francis
Rasia, Luciano Luis
Schmidt, Gabriela Ines
Taglioretti, Matias Luciano
Macphee, Ross Douglas Earle
Pardiñas, Ulises Francisco J.
New radiometric 40Ar–39Ar dates and faunistic analyses refine evolutionary dynamics of Neogene vertebrate assemblages in southern South America
topic_facet Radiometric 40Ar-39Ar dates
Mammalian fauna
Neogene
South America
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
description The vertebrate fossil record of the Pampean Region of Argentina occupies an important place in South American vertebrate paleontology. An abundance of localities has long been the main basis for constructing the chronostratigraphical/geochronological scale for the late Neogene–Quaternary of South America, as well as for understanding major patterns of vertebrate evolution, including the Great American Biotic Interchange. However, few independently-derived dates are available for constraining this record. In this contribution, we present new 40Ar/39Ar dates on escorias (likely the product of meteoric impacts) from the Argentinean Atlantic coast and statistically-based biochronological analyses that help to calibrate Late Miocene–Pliocene Pampean faunal successions. For the type areas of the Montehermosan and Chapadmalalan Ages/Stages, our results delimit their age ranges to 4.7–3.7 Ma and ca. 3.74–3.04 Ma, respectively. Additionally, from Buenos Aires Province, dates of 5.17 Ma and 4.33 Ma were recovered for “Huayquerian” and Montehermosan faunas. This information helps to better calibrate important first appearances of allochthonous taxa in South America, including one of the oldest records for procyonids (7.24–5.95 Ma), cricetids (6.95–5.46 Ma), and tayassuids (> 3.74 Ma, oldest high-confidence record). These results also constrain to ca. 3 Ma the last appearances of the autochthonous sparassodonts, as well as terror birds of large/middle body size in South America. South American faunal turnover during the late Neogene, including Late Pliocene extinctions, is interpreted as a consequence of knock-on effects from global climatic changes and initiation of the icehouse climate regime.
format Artículo
Artículo
publishedVersion
author Prevosti, Francisco Juan
Romano Muñoz, Cristo Omar
Forasiepi, Analia Marta
Hemming, Sidney
Bonini, Ricardo Adolfo
Candela, Adriana Magdalena
Cerdeño Serrano, Maria Esperanza
Madozzo Jaén, María Carolina
Ortiz, Pablo Edmundo
Pujos, François Roger Francis
Rasia, Luciano Luis
Schmidt, Gabriela Ines
Taglioretti, Matias Luciano
Macphee, Ross Douglas Earle
Pardiñas, Ulises Francisco J.
author_facet Prevosti, Francisco Juan
Romano Muñoz, Cristo Omar
Forasiepi, Analia Marta
Hemming, Sidney
Bonini, Ricardo Adolfo
Candela, Adriana Magdalena
Cerdeño Serrano, Maria Esperanza
Madozzo Jaén, María Carolina
Ortiz, Pablo Edmundo
Pujos, François Roger Francis
Rasia, Luciano Luis
Schmidt, Gabriela Ines
Taglioretti, Matias Luciano
Macphee, Ross Douglas Earle
Pardiñas, Ulises Francisco J.
author_sort Prevosti, Francisco Juan
title New radiometric 40Ar–39Ar dates and faunistic analyses refine evolutionary dynamics of Neogene vertebrate assemblages in southern South America
title_short New radiometric 40Ar–39Ar dates and faunistic analyses refine evolutionary dynamics of Neogene vertebrate assemblages in southern South America
title_full New radiometric 40Ar–39Ar dates and faunistic analyses refine evolutionary dynamics of Neogene vertebrate assemblages in southern South America
title_fullStr New radiometric 40Ar–39Ar dates and faunistic analyses refine evolutionary dynamics of Neogene vertebrate assemblages in southern South America
title_full_unstemmed New radiometric 40Ar–39Ar dates and faunistic analyses refine evolutionary dynamics of Neogene vertebrate assemblages in southern South America
title_sort new radiometric 40ar–39ar dates and faunistic analyses refine evolutionary dynamics of neogene vertebrate assemblages in southern south america
publisher Nature
publishDate 2021
url http://hdl.handle.net/11336/153289
http://suquia.ffyh.unc.edu.ar/handle/11336/153289
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