Early evolutionary differentiation of morphological variation in the mandible of South American caviomorph rodents (Rodentia, Caviomorpha)

Caviomorphs are a clade of South American rodents recorded at least since the early Oligocene (>31.5Ma) that exhibit ample eco-morphological variation. It has been proposed that phylogenetic structure is more important than ecological factors for understanding mandibular shape variation in this c...

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Detalles Bibliográficos
Autores principales: Álvarez, Alicia, Pérez, Sergio Iván, Verzi, Diego Héctor
Formato: Articulo
Lenguaje:Inglés
Publicado: 2011
Materias:
Zoología
Caviomorph rodents
Evolutionary history
Fossil record
Geometric morphometrics
Mandibular morphology
Phylogenetic comparative methods
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/84595
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-84595
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Zoología
Caviomorph rodents
Evolutionary history
Fossil record
Geometric morphometrics
Mandibular morphology
Phylogenetic comparative methods
spellingShingle Zoología
Caviomorph rodents
Evolutionary history
Fossil record
Geometric morphometrics
Mandibular morphology
Phylogenetic comparative methods
Álvarez, Alicia
Pérez, Sergio Iván
Verzi, Diego Héctor
Early evolutionary differentiation of morphological variation in the mandible of South American caviomorph rodents (Rodentia, Caviomorpha)
topic_facet Zoología
Caviomorph rodents
Evolutionary history
Fossil record
Geometric morphometrics
Mandibular morphology
Phylogenetic comparative methods
description Caviomorphs are a clade of South American rodents recorded at least since the early Oligocene (>31.5Ma) that exhibit ample eco-morphological variation. It has been proposed that phylogenetic structure is more important than ecological factors for understanding mandibular shape variation in this clade. This was interpreted as a result of the long-standing evolutionary history of caviomorphs and the early divergence of major lineages. In this work, we test this hypothesis through the analysis of morphological variation in the mandible of living and extinct species and compare this information with that obtained through comparative phylogenetic analyses. Our results support the hypothesis of early origin of mandibular variation; moreover, they suggest the conservation of early differentiated morphologies, which could indicate the existence of constrained evolutionary diversification.
format Articulo
Articulo
author Álvarez, Alicia
Pérez, Sergio Iván
Verzi, Diego Héctor
author_facet Álvarez, Alicia
Pérez, Sergio Iván
Verzi, Diego Héctor
author_sort Álvarez, Alicia
title Early evolutionary differentiation of morphological variation in the mandible of South American caviomorph rodents (Rodentia, Caviomorpha)
title_short Early evolutionary differentiation of morphological variation in the mandible of South American caviomorph rodents (Rodentia, Caviomorpha)
title_full Early evolutionary differentiation of morphological variation in the mandible of South American caviomorph rodents (Rodentia, Caviomorpha)
title_fullStr Early evolutionary differentiation of morphological variation in the mandible of South American caviomorph rodents (Rodentia, Caviomorpha)
title_full_unstemmed Early evolutionary differentiation of morphological variation in the mandible of South American caviomorph rodents (Rodentia, Caviomorpha)
title_sort early evolutionary differentiation of morphological variation in the mandible of south american caviomorph rodents (rodentia, caviomorpha)
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/84595
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AT perezsergioivan earlyevolutionarydifferentiationofmorphologicalvariationinthemandibleofsouthamericancaviomorphrodentsrodentiacaviomorpha
AT verzidiegohector earlyevolutionarydifferentiationofmorphologicalvariationinthemandibleofsouthamericancaviomorphrodentsrodentiacaviomorpha
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