Phylogenetic affinities of the late Miocene echimyid †Pampamys and the age of Thrichomys (Rodentia, Hystricognathi)

Phylogenetic affinities of the late Miocene echimyid †<i>Pampamys emmonsae</i> Verzi, Vucetich, and Montalvo, 1995 (Huayquerian South American Land Mammal Age, central Argentina), were analyzed. In the most-parsimonious tree obtained, subfamilies of Echimyidae were nonmonophyletic (excep...

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Autores principales: Olivares, Adriana Itatí, Verzi, Diego Héctor, Vucetich, María Guiomar, Montalvo, Claudia
Formato: Articulo
Lenguaje:Inglés
Publicado: 2012
Materias:
Ciencias Naturales
caviomorph
Echimyidae
late Miocene
phylogeny
South America
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84035
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84035
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
caviomorph
Echimyidae
late Miocene
phylogeny
South America
spellingShingle Ciencias Naturales
caviomorph
Echimyidae
late Miocene
phylogeny
South America
Olivares, Adriana Itatí
Verzi, Diego Héctor
Vucetich, María Guiomar
Montalvo, Claudia
Phylogenetic affinities of the late Miocene echimyid †Pampamys and the age of Thrichomys (Rodentia, Hystricognathi)
topic_facet Ciencias Naturales
caviomorph
Echimyidae
late Miocene
phylogeny
South America
description Phylogenetic affinities of the late Miocene echimyid †<i>Pampamys emmonsae</i> Verzi, Vucetich, and Montalvo, 1995 (Huayquerian South American Land Mammal Age, central Argentina), were analyzed. In the most-parsimonious tree obtained, subfamilies of Echimyidae were nonmonophyletic (except for Dactylomyinae). Two major clades were recovered. One of them included the living fossorial Eumysopinae and the extinct †<i>Theridomysops</i>.The other clade grouped the terrestrial eumysopines <i>Thrichomys</i> (punaré) and <i>Proechimys-Trinomys</i> (spiny rats), and the arboreal eumysopines <i>Mesomys</i> (spiny tree-rats) + Echimyinae - Dactylomyinae. †<i>Pampamys</i> was the sister genus of <i>Thrichomys</i>, suggesting the Huayquerian South American Land Mammal Age (>6.0 million years ago [mya] by biochronology) as a minimum age for the origin of the living genus. Both major echimyid clades recognized here are represented by simplified-molared species in the Huayquerian South American Land Mammal Age. This would be related to the expansion of open environments during the late Miocene, and the geographical bias of the fossiliferous Huayquerian deposits exposed mostly in southern South America.
format Articulo
Articulo
author Olivares, Adriana Itatí
Verzi, Diego Héctor
Vucetich, María Guiomar
Montalvo, Claudia
author_facet Olivares, Adriana Itatí
Verzi, Diego Héctor
Vucetich, María Guiomar
Montalvo, Claudia
author_sort Olivares, Adriana Itatí
title Phylogenetic affinities of the late Miocene echimyid †Pampamys and the age of Thrichomys (Rodentia, Hystricognathi)
title_short Phylogenetic affinities of the late Miocene echimyid †Pampamys and the age of Thrichomys (Rodentia, Hystricognathi)
title_full Phylogenetic affinities of the late Miocene echimyid †Pampamys and the age of Thrichomys (Rodentia, Hystricognathi)
title_fullStr Phylogenetic affinities of the late Miocene echimyid †Pampamys and the age of Thrichomys (Rodentia, Hystricognathi)
title_full_unstemmed Phylogenetic affinities of the late Miocene echimyid †Pampamys and the age of Thrichomys (Rodentia, Hystricognathi)
title_sort phylogenetic affinities of the late miocene echimyid †pampamys and the age of thrichomys (rodentia, hystricognathi)
publishDate 2012
url http://sedici.unlp.edu.ar/handle/10915/84035
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