Functional and historical determinants of shape in the scapula of Xenarthran mammals: Evolution of a complex morphological structure
Autor(a) principal: | |
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Data de Publicação: | 1999 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1002/(SICI)1097-4687(199909)241:3<251 http://hdl.handle.net/11449/224134 |
Resumo: | The 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. |
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Functional and historical determinants of shape in the scapula of Xenarthran mammals: Evolution of a complex morphological structureComparative methodsGeometrics morphometricsScapulaThin plate splineXenarthraThe 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.Depto. de Zoologia UNESP, Rio ClaroCtro. de Biociencias e Biotecnologia Univ. Estadual do Norte Fluminense, Av. Alberto Lamego 2000, Campos dos Goytacazes, RJ, 28015-620Depto. de Zoologia UNESP, Rio ClaroUniversidade Estadual Paulista (UNESP)Univ. Estadual do Norte FluminenseMonteiro, Leandro R. [UNESP]Abe, Augusto S. [UNESP]2022-04-28T19:54:53Z2022-04-28T19:54:53Z1999-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article251-263http://dx.doi.org/10.1002/(SICI)1097-4687(199909)241:3<251Journal of Morphology, v. 241, n. 3, p. 251-263, 1999.0362-2525http://hdl.handle.net/11449/22413410.1002/(SICI)1097-4687(199909)241:3<2512-s2.0-0033200092Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Morphologyinfo:eu-repo/semantics/openAccess2022-04-28T19:54:53Zoai:repositorio.unesp.br:11449/224134Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462022-04-28T19:54:53Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Functional and historical determinants of shape in the scapula of Xenarthran mammals: Evolution of a complex morphological structure |
title |
Functional and historical determinants of shape in the scapula of Xenarthran mammals: Evolution of a complex morphological structure |
spellingShingle |
Functional and historical determinants of shape in the scapula of Xenarthran mammals: Evolution of a complex morphological structure Monteiro, Leandro R. [UNESP] Comparative methods Geometrics morphometrics Scapula Thin plate spline Xenarthra |
title_short |
Functional and historical determinants of shape in the scapula of Xenarthran mammals: Evolution of a complex morphological structure |
title_full |
Functional and historical determinants of shape in the scapula of Xenarthran mammals: Evolution of a complex morphological structure |
title_fullStr |
Functional and historical determinants of shape in the scapula of Xenarthran mammals: Evolution of a complex morphological structure |
title_full_unstemmed |
Functional and historical determinants of shape in the scapula of Xenarthran mammals: Evolution of a complex morphological structure |
title_sort |
Functional and historical determinants of shape in the scapula of Xenarthran mammals: Evolution of a complex morphological structure |
author |
Monteiro, Leandro R. [UNESP] |
author_facet |
Monteiro, Leandro R. [UNESP] Abe, Augusto S. [UNESP] |
author_role |
author |
author2 |
Abe, Augusto S. [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Univ. Estadual do Norte Fluminense |
dc.contributor.author.fl_str_mv |
Monteiro, Leandro R. [UNESP] Abe, Augusto S. [UNESP] |
dc.subject.por.fl_str_mv |
Comparative methods Geometrics morphometrics Scapula Thin plate spline Xenarthra |
topic |
Comparative methods Geometrics morphometrics Scapula Thin plate spline Xenarthra |
description |
The 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. |
publishDate |
1999 |
dc.date.none.fl_str_mv |
1999-09-01 2022-04-28T19:54:53Z 2022-04-28T19:54:53Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1002/(SICI)1097-4687(199909)241:3<251 Journal of Morphology, v. 241, n. 3, p. 251-263, 1999. 0362-2525 http://hdl.handle.net/11449/224134 10.1002/(SICI)1097-4687(199909)241:3<251 2-s2.0-0033200092 |
url |
http://dx.doi.org/10.1002/(SICI)1097-4687(199909)241:3<251 http://hdl.handle.net/11449/224134 |
identifier_str_mv |
Journal of Morphology, v. 241, n. 3, p. 251-263, 1999. 0362-2525 10.1002/(SICI)1097-4687(199909)241:3<251 2-s2.0-0033200092 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Morphology |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
251-263 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799965658442629120 |