Functional and historical determinants of shape in the scapula of Xenarthran mammals: Evolution of a complex morphological structure

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dc.contributor.authorMonteiro, L. R.
dc.contributor.authorAbe, Augusto Shinya [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-02-26T17:06:01Z
dc.date.accessioned2014-05-20T13:59:12Z
dc.date.available2014-02-26T17:06:01Z
dc.date.available2014-05-20T13:59:12Z
dc.date.issued1999-09-01
dc.description.abstractThe mammalian scapula is a complex morphological structure, composed of two ossification plates that fuse into a single structure. Most studies on morphological differentiation in the scapula have considered it to be a simple, spatially integrated structure, primarily influenced by the important locomotor function presented by this element. We used recently developed geometric morphometric techniques to test and quantify functional and phylogenetic influences on scapular shape variation in fossil and extant xenarthran mammals. The order Xenarthra is well represented in the fossil record and presents a stable phylogenetic hypothesis for its genealogical history. In addition, its species present a large variety of locomotor habits. Our results show that approximately half of the shape variation in the scapula is due to phylogenetic heritage. This is contrary to the view that the scapula is influenced only by functional demands. There are large-scale shape transformations that provide biomechanical adaptation for the several habits (arboreality, terrestriality, and digging), and small scale-shape transformations (mostly related to the coracoid process) that are not influenced by function. A nonlinear relationship between morphometric and phylogenetic distances indicates the presence of a complex mixture of evolutionary processes acting on shape differentiation of the scapula. J. Morphol. 241,251-263, 1999. (C) 1999 Wiley-Liss, Inc.en
dc.description.affiliationUNESP, Dept Zool, Rio Claro, Brazil
dc.description.affiliationUnespUNESP, Dept Zool, Rio Claro, Brazil
dc.format.extent251-263
dc.identifierhttp://dx.doi.org/10.1002/(SICI)1097-4687(199909)241:3<251
dc.identifier.citationJournal of Morphology. New York: Wiley-liss, v. 241, n. 3, p. 251-263, 1999.
dc.identifier.doi10.1002/(SICI)1097-4687(199909)241:3<251
dc.identifier.issn0362-2525
dc.identifier.lattes8776757457144680
dc.identifier.urihttp://hdl.handle.net/11449/21052
dc.identifier.wosWOS:000082275000006
dc.language.isoeng
dc.publisherWiley-Blackwell
dc.relation.ispartofJournal of Morphology
dc.relation.ispartofjcr1.711
dc.relation.ispartofsjr0,766
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectgeometrics morphometricspt
dc.subjectscapulapt
dc.subjectXenarthrapt
dc.subjectcomparative methodspt
dc.subjectthin plate splinept
dc.titleFunctional and historical determinants of shape in the scapula of Xenarthran mammals: Evolution of a complex morphological structureen
dc.typeArtigo
dcterms.licensehttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dcterms.rightsHolderWiley-Blackwell
unesp.author.lattes8776757457144680[2]
unesp.author.orcid0000-0002-6765-8726[2]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Rio Claropt

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Artigos - Zoologia - IBRC