Two- Versus Three-Dimensional Morphometric Approaches in Macroevolution : Insight from the Mandible of Caviomorph Rodents

Morphological variation is one of the most studied dimensions of evolutionary biology, given its close relationship with the ecological aspects of biological diversification. In this work we examine the differences between the use of two- and three-dimensional morphometric techniques for the analysi...

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Autores principales:	Álvarez, Alicia, Pérez, Sergio Iván
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2012
Materias:	Ciencias Naturales Antropología Caviomorph rodents Evolutionary diversification Geometric morphometrics Mandible morphology Shape dimensionality
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/139516
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-139516
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 Antropología Caviomorph rodents Evolutionary diversification Geometric morphometrics Mandible morphology Shape dimensionality
spellingShingle	Ciencias Naturales Antropología Caviomorph rodents Evolutionary diversification Geometric morphometrics Mandible morphology Shape dimensionality Álvarez, Alicia Pérez, Sergio Iván Two- Versus Three-Dimensional Morphometric Approaches in Macroevolution : Insight from the Mandible of Caviomorph Rodents
topic_facet	Ciencias Naturales Antropología Caviomorph rodents Evolutionary diversification Geometric morphometrics Mandible morphology Shape dimensionality
description	Morphological variation is one of the most studied dimensions of evolutionary biology, given its close relationship with the ecological aspects of biological diversification. In this work we examine the differences between the use of two- and three-dimensional morphometric techniques for the analysis of macroevolutionary patterns of morphological variation in the mandible of the South American caviomorph rodents, which displays varying degrees of hystricognathy. The variation patterns were similar for 2D and 3D coordinate datasets. However, phylogenetic comparative statistical analyses showed widely different results for mandible variation. Both the phylogenetic signal values and the results of phylogenetic regressions were markedly different between the two macroevolutionary mandible datasets. This suggests that the inclusion of the third coordinate to characterize a hystricognathous mandible may lead to completely different interpretations concerning the processes that could be regulating the morphological diversification of the caviomorph mandible. We also compare these results with the 2D and 3D macroevolutionary patterns of variation in cranial shape and the intra-specific mandible variation. The variation patterns were similar for 2D and 3D coordinate for all these comparative datasets. The differing results obtained at different evolutionary scales, give strength to the statement about careful selection of data not only in studies of morphological variation in caviomorphs but also for other groups of organisms.
format	Articulo Articulo
author	Álvarez, Alicia Pérez, Sergio Iván
author_facet	Álvarez, Alicia Pérez, Sergio Iván
author_sort	Álvarez, Alicia
title	Two- Versus Three-Dimensional Morphometric Approaches in Macroevolution : Insight from the Mandible of Caviomorph Rodents
title_short	Two- Versus Three-Dimensional Morphometric Approaches in Macroevolution : Insight from the Mandible of Caviomorph Rodents
title_full	Two- Versus Three-Dimensional Morphometric Approaches in Macroevolution : Insight from the Mandible of Caviomorph Rodents
title_fullStr	Two- Versus Three-Dimensional Morphometric Approaches in Macroevolution : Insight from the Mandible of Caviomorph Rodents
title_full_unstemmed	Two- Versus Three-Dimensional Morphometric Approaches in Macroevolution : Insight from the Mandible of Caviomorph Rodents
title_sort	two- versus three-dimensional morphometric approaches in macroevolution : insight from the mandible of caviomorph rodents
publishDate	2012
url	http://sedici.unlp.edu.ar/handle/10915/139516
work_keys_str_mv	AT alvarezalicia twoversusthreedimensionalmorphometricapproachesinmacroevolutioninsightfromthemandibleofcaviomorphrodents AT perezsergioivan twoversusthreedimensionalmorphometricapproachesinmacroevolutioninsightfromthemandibleofcaviomorphrodents
bdutipo_str	Repositorios
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Two- Versus Three-Dimensional Morphometric Approaches in Macroevolution : Insight from the Mandible of Caviomorph Rodents

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