The Role of Evolutionary Integration in the Morphological Evolution of the Skull of Caviomorph Rodents (Rodentia: Hystricomorpha)

The mammalian cranium is a complex structure composed by three partially independent modules: face, cranial base and cranial vault. At the same time, it interacts with the mandible by sharing the masticatory function. Since these units develop and work together, their function and evolution may occu...

Descripción completa

Detalles Bibliográficos
Autores principales: Álvarez, Alicia, Pérez, Sergio Iván, Verzi, Diego Héctor
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Ciencias Naturales
Caviomorph rodents
Evolutionary allometry
Geometric morphometrics
Morphological integration
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/134753
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-134753
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 rodents
Evolutionary allometry
Geometric morphometrics
Morphological integration
spellingShingle Ciencias Naturales
Caviomorph rodents
Evolutionary allometry
Geometric morphometrics
Morphological integration
Álvarez, Alicia
Pérez, Sergio Iván
Verzi, Diego Héctor
The Role of Evolutionary Integration in the Morphological Evolution of the Skull of Caviomorph Rodents (Rodentia: Hystricomorpha)
topic_facet Ciencias Naturales
Caviomorph rodents
Evolutionary allometry
Geometric morphometrics
Morphological integration
description The mammalian cranium is a complex structure composed by three partially independent modules: face, cranial base and cranial vault. At the same time, it interacts with the mandible by sharing the masticatory function. Since these units develop and work together, their function and evolution may occur through correlated changes. Here, we assessed the patterns of evolutionary shape variation and covariation (i.e. integration) of cranial modules and mandible among the highly ecomorphologically diverse caviomorph rodents, and the potential evolutionary consequences on the morphological evolution of this clade. Three-dimensional geometric morphometrics was used to describe cranio-mandibular shape. The phylogenetic signal and evolutionary allometric component of morphometric variables were analyzed; in addition, evolutionary covariation among cranial modules and mandible was assessed using phylogenetic comparative methods. Significant phylogenetic signal and evolutionary allometry were detected. Large covariance values, involving coordinated breadth increase as the main shape change, were recorded between cranial vault and base, followed by cranial vault and face, and face and mandible. Since the basicranium may be the main cranial integrator, the overall widening of the cranial base, derived from the enlargement of the auditory bullae, could be influencing the integrated evolution of skull. In caviomorphs, the cranio-mandibular morphological evolution would be the outcome of a tight covariation among the modular units, and this could be driven by several factors such as allometry and specializations to environmental niches.
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 The Role of Evolutionary Integration in the Morphological Evolution of the Skull of Caviomorph Rodents (Rodentia: Hystricomorpha)
title_short The Role of Evolutionary Integration in the Morphological Evolution of the Skull of Caviomorph Rodents (Rodentia: Hystricomorpha)
title_full The Role of Evolutionary Integration in the Morphological Evolution of the Skull of Caviomorph Rodents (Rodentia: Hystricomorpha)
title_fullStr The Role of Evolutionary Integration in the Morphological Evolution of the Skull of Caviomorph Rodents (Rodentia: Hystricomorpha)
title_full_unstemmed The Role of Evolutionary Integration in the Morphological Evolution of the Skull of Caviomorph Rodents (Rodentia: Hystricomorpha)
title_sort role of evolutionary integration in the morphological evolution of the skull of caviomorph rodents (rodentia: hystricomorpha)
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/134753
work_keys_str_mv AT alvarezalicia theroleofevolutionaryintegrationinthemorphologicalevolutionoftheskullofcaviomorphrodentsrodentiahystricomorpha
AT perezsergioivan theroleofevolutionaryintegrationinthemorphologicalevolutionoftheskullofcaviomorphrodentsrodentiahystricomorpha
AT verzidiegohector theroleofevolutionaryintegrationinthemorphologicalevolutionoftheskullofcaviomorphrodentsrodentiahystricomorpha
AT alvarezalicia roleofevolutionaryintegrationinthemorphologicalevolutionoftheskullofcaviomorphrodentsrodentiahystricomorpha
AT perezsergioivan roleofevolutionaryintegrationinthemorphologicalevolutionoftheskullofcaviomorphrodentsrodentiahystricomorpha
AT verzidiegohector roleofevolutionaryintegrationinthemorphologicalevolutionoftheskullofcaviomorphrodentsrodentiahystricomorpha
bdutipo_str Repositorios
_version_ 1764820455391232003

Ejemplares similares