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dc.contributor.author
Marivaux, Laurent
dc.contributor.author
Boivin, Myriam
dc.contributor.author
Adnet, Sylvain
dc.contributor.author
Benammi, Mohamed
dc.contributor.author
Tabuce, Rodolphe
dc.contributor.author
Benammi, Mouloud
dc.date.available
2021-01-18T23:03:14Z
dc.date.issued
2019-09
dc.identifier.citation
Marivaux, Laurent; Boivin, Myriam; Adnet, Sylvain; Benammi, Mohamed; Tabuce, Rodolphe; et al.; Incisor Enamel Microstructure of Hystricognathous and Anomaluroid Rodents from the Earliest Oligocene of Dakhla, Atlantic Sahara (Morocco); Springer; Journal of Mammalian Evolution; 26; 3; 9-2019; 373-388
dc.identifier.issn
1064-7554
dc.identifier.uri
http://hdl.handle.net/11336/122954
dc.description.abstract
Seven hystricognaths and five anomaluroids have been recently described from the earliest Oligocene of the Dakhla (DAK C2) region of Morocco, based primarily on isolated cheek teeth. Here, we analyzed the enamel microstructure of thirty associated isolated fragments of incisors. Among these specimens, only three display an early stage of uniserial Hunter-Schreger bands (HSBs), with mostly a single prism per band, but also occasionally two prisms per band (in two specimens), and a thin interprismatic matrix (IPM) that runs parallel to the prism direction, thereby documenting incisors of anomaluroids. All other sampled incisors display an enamel with multiserial HSBs, thereby documenting hystricognaths. For these latter, we recorded primarily an IPM crystallite arrangement describing the subtype 2 of multiserial HSBs, but with variation including a wide amplitude in the angle (acute) formed between the crystallites of IPM and those of the prisms, some variations in the frequency of the IPM sheet anastomoses, in the number of prisms per HSBs, and variations in the inclination of the HSBs. The absence of the subtypes 2–3 and 3 of multiserial HSBs in DAK C2 suggests that African hystricognathous rodents had still not achieved these most resistant multiserial HSBs at that time. The drier, cooler climatic regime of the early Oligocene, having increased the fragmentation and opening of habitats, might have played a role in the subsequent selection of taxa having acquired a more resistant incisor enamel.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
AFRICA
dc.subject
PALEOGENE
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RODENTIA
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UNISERIAL
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MULTISERIAL
dc.subject.classification
Biología
dc.subject.classification
Ciencias Biológicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Incisor Enamel Microstructure of Hystricognathous and Anomaluroid Rodents from the Earliest Oligocene of Dakhla, Atlantic Sahara (Morocco)
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-11-18T20:47:18Z
dc.journal.volume
26
dc.journal.number
3
dc.journal.pagination
373-388
dc.journal.pais
Alemania
dc.journal.ciudad
Berlin
dc.description.fil
Fil: Marivaux, Laurent. Université Montpellier II; Francia. Centre National de la Recherche Scientifique; Francia
dc.description.fil
Fil: Boivin, Myriam. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Ecorregiones Andinas; Argentina. Université Montpellier II; Francia. Centre National de la Recherche Scientifique; Francia
dc.description.fil
Fil: Adnet, Sylvain. Université Montpellier II; Francia. Centre National de la Recherche Scientifique; Francia
dc.description.fil
Fil: Benammi, Mohamed. Université Ibn Tofail; Marruecos
dc.description.fil
Fil: Tabuce, Rodolphe. Université Montpellier II; Francia. Centre National de la Recherche Scientifique; Francia
dc.description.fil
Fil: Benammi, Mouloud. Université de Poitiers; Francia
dc.journal.title
Journal of Mammalian Evolution
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s10914-017-9426-5
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/10.1007/s10914-017-9426-5
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