Variation in mandible shape in Thrichomys apereoides (Mammalia: Rodentia): Geometric analysis of a complex morphological structure

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorDuarte, Luiza Carla
dc.creatorMonteiro, Leandro Rabello
dc.creatorVon Zuben, Fernando José
dc.creatorDos Reis, Sérgio Furtado
dc.date2014-05-27T11:19:56Z
dc.date2016-10-25T18:16:33Z
dc.date2014-05-27T11:19:56Z
dc.date2016-10-25T18:16:33Z
dc.date2000-09-01
dc.date.accessioned2017-04-06T00:57:36Z
dc.date.available2017-04-06T00:57:36Z
dc.identifierSystematic Biology, v. 49, n. 3, p. 563-578, 2000.
dc.identifier1063-5157
dc.identifierhttp://hdl.handle.net/11449/66241
dc.identifierhttp://acervodigital.unesp.br/handle/11449/66241
dc.identifierWOS:000089405100010
dc.identifier2-s2.0-0034350324
dc.identifierhttp://www.jstor.org/stable/2585387
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/887852
dc.descriptionThe model of development and evolution of complex morphological structures conceived by Atchley and Hall in 1991 (Biol. Rev. 66:101-157), which establishes that changes at the macroscopic, morphogenetic level can be statistically detected as variation in skeletal units at distinct scales, was applied in combination with the formalism of geometric morphometrics to study variation in mandible shape among populations of the rodent species Thrichomys apereoides. The thin-plate spline technique produced geometric descriptors of shape derived from anatomical landmarks in the mandible, which we used with graphical and inferential approaches to partition the contribution of global and localized components to the observed differentiation in mandible shape. A major pattern of morphological differentiation in T. apereoides is attributable to localized components of shape at smaller geometric scales associated with specific morphogenetic units of the mandible. On the other hand, a clinal trend of variation is associated primarily with localized components of shape at larger geometric scales. Morphogenetic mechanisms assumed to be operating to produce the observed differentiation in the specific units of the mandible include mesenchymal condensation differentiation, muscle hypertrophy, and tooth growth. Perspectives for the application of models of morphological evolution and geometric morphometrics to morphologically based systematic biology are considered.
dc.languageeng
dc.relationSystematic Biology
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectComplex morphological structures
dc.subjectGeometric morphometrics
dc.subjectMorphological evolution
dc.subjectThin-plate splines
dc.subjectThrichomys apereoides
dc.subjectanimal
dc.subjectclassification
dc.subjectgenetic variability
dc.subjectgenetics
dc.subjecthistology
dc.subjectmandible
dc.subjectrodent
dc.subjectAnimals
dc.subjectMandible
dc.subjectRodentia
dc.subjectVariation (Genetics)
dc.titleVariation in mandible shape in Thrichomys apereoides (Mammalia: Rodentia): Geometric analysis of a complex morphological structure
dc.typeOtro


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