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dc.contributor.author
Arnal, Michelle
dc.contributor.author
Perez, Maria Encarnacion
dc.date.available
2016-04-20T20:49:04Z
dc.date.issued
2013-02
dc.identifier.citation
Arnal, Michelle; Perez, Maria Encarnacion; A new acaremyid rodent (Hystricognathi: Octodontoidea) from the middle Miocene of Patagonia (South America) and considerations on the early evolution of Octodontoidea; Magnolia Press; Zootaxa; 3616; 2; 2-2013; 119-134
dc.identifier.issn
1175-5326
dc.identifier.uri
http://hdl.handle.net/11336/5296
dc.description.abstract
Octodontoidea is the most speciose and ecologically diverse superfamily of caviomorph rodents. The systematic relation-ships of modern octodontoids is moderately accepted, however, the relationships of fossils (from the Eocene?–middle Miocene) are not clear. In recent years the hypothesis of a complex early evolution of the superfamily has emerged, with “basal octodontoids” representing different evolutionary lineages. The extinct family Acaremyidae may represent one such lineage, consisting of the genera Acaremys, Sciamys, Galileomys, and variably Platypittamys. In this work we de-scribe a new octodontoid rodent recorded in post-Colloncuran? levels exposed at the locality of El Petiso, Northwest of Chubut Province, Argentina. Based on a systematic analysis of dental characters, we conclude that the new specimens correspond to a new species of Sciamys. Additionally, if the post-Colloncuran age for El Petiso is verified, the new species will extend the temporal range of the family Acaremyidae until, at least, the late middle Miocene, as well as the temporal range for the genus Sciamys from the Santacrucian SALMA. Our phylogenetic analyses corroborate the position of the new species as a member of Sciamys, and confirm that Acaremyidae represents an extinct family from Patagonian South America that lived until the middle Miocene. Massoiamys obliquus qualifies as morphological ancestor that pre-announc-es the octodontiform tooth pattern of octodontids. Thus, the octodontiform tooth pattern appears at least twice within the superfamily Octodontoidea.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Magnolia Press
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Octodontoidea
dc.subject
Acaremyidae
dc.subject
Phylogeny
dc.subject
Patagonia
dc.subject
Middle Miocene
dc.subject.classification
Paleontología
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
A new acaremyid rodent (Hystricognathi: Octodontoidea) from the middle Miocene of Patagonia (South America) and considerations on the early evolution of Octodontoidea
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2016-05-06 15:52:43.262787-03
dc.journal.volume
3616
dc.journal.number
2
dc.journal.pagination
119-134
dc.journal.pais
Nueva Zelanda
dc.journal.ciudad
Auckland
dc.description.fil
Fil: Arnal, Michelle. Universidad Nacional de la Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Perez, Maria Encarnacion. Museo Paleontológico Egidio Feruglio; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
dc.journal.title
Zootaxa
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://biotaxa.org/Zootaxa/article/view/zootaxa.3616.2.2
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/10.11646/zootaxa.3616.2.2
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.11646/zootaxa.3616.2.2
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