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dc.contributor.author
Ciancio, Martin Ricardo
dc.contributor.author
Vieytes, Emma Carolina
dc.contributor.author
Castro, Mariela C.
dc.contributor.author
Carlini, Alfredo Armando
dc.date.available
2021-08-23T14:38:26Z
dc.date.issued
2021-08
dc.identifier.citation
Ciancio, Martin Ricardo; Vieytes, Emma Carolina; Castro, Mariela C.; Carlini, Alfredo Armando; Dental enamel structure in long-nosed armadillos (Xenarthra: Dasypus) and its evolutionary implications; Wiley Blackwell Publishing, Inc; Zoological Journal of the Linnean Society; 192; 4; 8-2021; 1237-1252
dc.identifier.issn
0024-4082
dc.identifier.uri
http://hdl.handle.net/11336/138691
dc.description.abstract
Most xenarthrans have a reduced and simplified dentition that lacks enamel. However, the presence of prismatic enamel has been recorded in the Eocene armadillos Utaetus buccatus (Euphractinae) and Astegotherium dichotomus (Astegotheriini). Among extant xenarthrans, the occurrence of enamel has been recognized only in the long-nosed armadillo, Dasypus novemcinctus (Dasypodinae), but its microstructure has never been described. In this contribution, we analyse the enamel microstructure in deciduous and permanent teeth of four Dasypus species. In deciduous molariform teeth of some species, we identify an apical cap of vestigial enamel (without crystalline structure), interpreted as an amorphous ameloblastic secretion. In permanent teeth, a thin layer of true enamel is found in the apical portion of unworn molariforms. The enamel is prismatic in D. novemcinctus, but in Dasypus hybridus, Dasypus sabanicola and Dasypus punctatus it is prismless. Taking into account the Eocene species of armadillos, the ancestral condition of enamel in cingulates could have been more complex (as in other placentals) and undergone progressive reduction, as shown in the Dasypus lineage. In light of previous genetic and developmental studies, we review and briefly discuss the processes that can account for the reduction/loss of enamel in extant and extinct armadillos. The retention of enamel and the fact that this genus is the only living xenarthran with two functional generations of teeth support the early divergence of the Dasypus lineage among living cingulates. This is in agreement with morphological and molecular analyses.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
DASYPODIDAE
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DEVELOPMENT
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EVOLUTION
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PRISMATIC ENAMEL
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TEETH
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VESTIGIAL ENAMEL
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Paleontología
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Dental enamel structure in long-nosed armadillos (Xenarthra: Dasypus) and its evolutionary implications
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-08-13T16:51:23Z
dc.journal.volume
192
dc.journal.number
4
dc.journal.pagination
1237-1252
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Ciancio, Martin Ricardo. 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.description.fil
Fil: Vieytes, Emma Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Laboratorio de Anatomía Comparada; Argentina
dc.description.fil
Fil: Castro, Mariela C.. Universidad Federal de Catalão; Brasil
dc.description.fil
Fil: Carlini, Alfredo Armando. 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.journal.title
Zoological Journal of the Linnean Society
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/zoolinnean/article-abstract/192/4/1237/5999221?redirectedFrom=fulltext
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1093/zoolinnean/zlaa119
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