Tooth morphology of Echimyidae (Rodentia, Caviomorpha): Homology assessments, fossils, and evolution

dc.creatorCandela, Adriana Magdalena
dc.creatorRasia, Luciano Luis
dc.date2012-02
dc.date.accessioned2023-08-31T00:11:52Z
dc.date.available2023-08-31T00:11:52Z
dc.identifierhttp://hdl.handle.net/11336/189033
dc.identifierCandela, Adriana Magdalena; Rasia, Luciano Luis; Tooth morphology of Echimyidae (Rodentia, Caviomorpha): Homology assessments, fossils, and evolution; Wiley Blackwell Publishing, Inc; Zoological Journal of the Linnean Society; 164; 2; 2-2012; 451-480
dc.identifier0024-4082
dc.identifierCONICET Digital
dc.identifierCONICET
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/8543201
dc.descriptionEchimyidae constitute the most important radiation of caviomorph rodents in the Neotropical region, represented by 20 extant genera and several extinct species. Both in extant and fossil forms, this diversity is reflected by a significant morphological variation found in crown structures of the cheek teeth. Different hypotheses of primary homology have been proposed for these structures, which, in turn, support diverse dental evolutionary hypotheses. In this contribution we inspect the main structures (cusps and lophids) of the lower deciduous teeth and molars in extinct and extant Echimyidae, and establish their topological correspondences. Comparisons with cusps and lophids of Erethizontidae are emphasized. We explore the testing of alternative primary hypotheses of lophid correspondences in a cladistic context. Following a 'dynamic' approach, we select the hypothesis of primary homology, which produced the more parsimonious results, and evaluate the evolutionary transformations of the dental characters analysed. In this context, the phylogenetic relationships of living Myocastor coypus (Molina, 1782) with the extinct Tramyocastor and Paramyocastor are tested. Our results indicate that pentalophodonty is the derived condition for the lower molars in Echimyidae, that trilophodonty evolved independently at least three times during the evolutionary history of these rodents, and that tetralophodonty represents the plesiomorphic condition. This study shows that dental evolution in echimyids can be better understood when occlusal structures are expressed as reliably comparable characters, and when fossils are taken into account.
dc.descriptionFil: Candela, Adriana Magdalena. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
dc.descriptionFil: Rasia, Luciano Luis. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
dc.formatapplication/pdf
dc.formatapplication/pdf
dc.formatapplication/pdf
dc.languageeng
dc.publisherWiley Blackwell Publishing, Inc
dc.relationinfo:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1111/j.1096-3642.2011.00762.x
dc.relationinfo:eu-repo/semantics/altIdentifier/doi/10.1111/j.1096-3642.2011.00762.x
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subjectARGENTINA
dc.subjectCHEEK TEETH CHARACTERS
dc.subjectDENTAL EVOLUTION
dc.subjectLATE CENOZOIC
dc.subjectMYOCASTORINAE
dc.subjectPARSIMONY ANALYSIS
dc.subjecthttps://purl.org/becyt/ford/1.6
dc.subjecthttps://purl.org/becyt/ford/1
dc.titleTooth morphology of Echimyidae (Rodentia, Caviomorpha): Homology assessments, fossils, and evolution
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:ar-repo/semantics/artículo
dc.typeinfo:eu-repo/semantics/publishedVersion


Este ítem pertenece a la siguiente institución