Evolution of South American Paucituberculata (Metatheria: Marsupialia): adaptive radiation and climate changes at the Eocene-Oligocene boundary

The Eocene-Oligocene boundary (EOB) marks a period of remodeling in the metatherian faunas of South America. Paucituberculata was one of the groups that successfully diversified as the climate and environment conditions changed, and they became, during the first part of the Neogene, an important com...

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Detalles Bibliográficos
Autores principales: Abello, María Alejandra, Toledo, Néstor, Ortiz Jaureguizar, Edgardo
Formato: Articulo
Lenguaje:Inglés
Publicado: 2018
Materias:
Paleontología
Disparity
Diversity
Body size
Cenozoic
Marsupials
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/127161
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-127161
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Paleontología
Disparity
Diversity
Body size
Cenozoic
Marsupials
spellingShingle Paleontología
Disparity
Diversity
Body size
Cenozoic
Marsupials
Abello, María Alejandra
Toledo, Néstor
Ortiz Jaureguizar, Edgardo
Evolution of South American Paucituberculata (Metatheria: Marsupialia): adaptive radiation and climate changes at the Eocene-Oligocene boundary
topic_facet Paleontología
Disparity
Diversity
Body size
Cenozoic
Marsupials
description The Eocene-Oligocene boundary (EOB) marks a period of remodeling in the metatherian faunas of South America. Paucituberculata was one of the groups that successfully diversified as the climate and environment conditions changed, and they became, during the first part of the Neogene, an important component of micromammal assemblages. Among paucituberculatans, the non-pichipilid palaeothentoids (NPP) has been recognized as the clade that diversified most widely in post-EOB times. Here we explore the evolutionary response of the NPP to the climatic-environmental changes around the EOB, by analysing the temporal patterns of disparity, taxonomic diversity and body mass in a phylogenetic context. To asses the magnitude of the NPP radiation comparisons based on these macroevolutionary parameters were done with its sister-group Pichipilidae, and its next closest relative, the Caenolestidae. In all considered parameters, NPP reached values significantly higher than the remaining paucituberculatans clades. From its initial diversification in the middle Eocene, taxonomic diversity increased through time, but it was decoupled from disparity across the EOB, and from the late Oligocene to early Miocene. The Oligocene emerges as the key period in NPP evolution, which is evidenced by a significant and concordant expansion of disparity and taxonomic diversity, suggesting evolution into empty ecospace.
format Articulo
Articulo
author Abello, María Alejandra
Toledo, Néstor
Ortiz Jaureguizar, Edgardo
author_facet Abello, María Alejandra
Toledo, Néstor
Ortiz Jaureguizar, Edgardo
author_sort Abello, María Alejandra
title Evolution of South American Paucituberculata (Metatheria: Marsupialia): adaptive radiation and climate changes at the Eocene-Oligocene boundary
title_short Evolution of South American Paucituberculata (Metatheria: Marsupialia): adaptive radiation and climate changes at the Eocene-Oligocene boundary
title_full Evolution of South American Paucituberculata (Metatheria: Marsupialia): adaptive radiation and climate changes at the Eocene-Oligocene boundary
title_fullStr Evolution of South American Paucituberculata (Metatheria: Marsupialia): adaptive radiation and climate changes at the Eocene-Oligocene boundary
title_full_unstemmed Evolution of South American Paucituberculata (Metatheria: Marsupialia): adaptive radiation and climate changes at the Eocene-Oligocene boundary
title_sort evolution of south american paucituberculata (metatheria: marsupialia): adaptive radiation and climate changes at the eocene-oligocene boundary
publishDate 2018
url http://sedici.unlp.edu.ar/handle/10915/127161
work_keys_str_mv AT abellomariaalejandra evolutionofsouthamericanpaucituberculatametatheriamarsupialiaadaptiveradiationandclimatechangesattheeoceneoligoceneboundary
AT toledonestor evolutionofsouthamericanpaucituberculatametatheriamarsupialiaadaptiveradiationandclimatechangesattheeoceneoligoceneboundary
AT ortizjaureguizaredgardo evolutionofsouthamericanpaucituberculatametatheriamarsupialiaadaptiveradiationandclimatechangesattheeoceneoligoceneboundary
bdutipo_str Repositorios
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