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dc.contributor.author
Boivin, Myriam
dc.contributor.author
Marivaux, Laurent
dc.contributor.author
Orliac, Maëva J.
dc.contributor.author
Pujos, François Roger Francis
dc.contributor.author
Salas Gismondi, Rodolfo
dc.contributor.author
Tejada Lara, Julia V.
dc.contributor.author
Antoine, Pierre Olivier
dc.date.available
2018-12-13T18:22:46Z
dc.date.issued
2017-04
dc.identifier.citation
Boivin, Myriam; Marivaux, Laurent; Orliac, Maëva J.; Pujos, François Roger Francis; Salas Gismondi, Rodolfo; et al.; Late middle Eocene Caviomorph Rodents from Contamana, Peruvian Amazonia; Coquina Press; Palaeontologia Electronica; 20; 1; 4-2017; 1-50
dc.identifier.issn
1094-8074
dc.identifier.uri
http://hdl.handle.net/11336/66430
dc.description.abstract
Caviomorph rodents represent one of the most successful groups of placental mammals from South America. Despite their modern, Neogene and late Paleogene high diversity, their early evolutionary history has long remained obscure. Recent field expeditions in Peruvian Amazonia have yielded among the earliest representatives of that group, in deposits dating from the late middle Eocene (Contamana, CTA-27 locality, ~41 Ma). Here, we provide an exhaustive analysis of the rodent material from CTA27 and from new sub-coeval localities discovered in the same area and geological formation (Pozo Formation): CTA-47, CTA-51, CTA-73, CTA-66, and CTA-29. A total of 20 rodent taxa are identified in these localities, among which one from CTA-29 (Pozomys ucayaliensis gen. et sp. nov.) remains with uncertain suprafamilial affinities. Additionally, the material of CTA-27 previously attributed to Eobranisamys sp. is assigned here to the new species Eobranisamys javierpradoi. In terms of taxonomic composition, Eocene localities from Contamana area have many taxa in common (Cachiyacuy, Canaanimys, Eobranisamys, and Eoespina, or very close relatives). These Eocene assemblages are clearly distinct from Oligocene ones, mostly documented at mid and high latitudes. In contrast, they share some affinities with the late Eocene-earliest Oligocene Santa Rosa locality (Peruvian Amazonia), from which the two genera Eobranisamys and Eoespina were originally described. This faunal closeness might more reflect biogeographic affinities than contemporaneity. In addition, the occlusal pattern of some upper molars of Eosallamys from Santa Rosa recalls that of Cachiyacuy and Canaanimys. These low-latitude caviomorph assemblages provide new insights into the early evolutionary history, biogeography, and paleodiversity of that group
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Coquina Press
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Caviomorph Rodents
dc.subject
Late Middle Eocene
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Contamana
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Peruvian Amazonia
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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
Late middle Eocene Caviomorph Rodents from Contamana, Peruvian Amazonia
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-10-23T14:42:52Z
dc.identifier.eissn
1532-3056
dc.journal.volume
20
dc.journal.number
1
dc.journal.pagination
1-50
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Nueva York
dc.description.fil
Fil: Boivin, Myriam. Université Montpellier II; Francia. Centre National de la Recherche Scientifique; Francia
dc.description.fil
Fil: Marivaux, Laurent. Laboratoire de Paléontologie, Ise-m; Francia
dc.description.fil
Fil: Orliac, Maëva J.. Laboratoire de Paléontologie, Ise-m; Francia
dc.description.fil
Fil: Pujos, François Roger Francis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
dc.description.fil
Fil: Salas Gismondi, Rodolfo. Departamento de Paleontología de Vertebrados, Musm; Perú
dc.description.fil
Fil: Tejada Lara, Julia V.. Departamento de Paleontología de Vertebrados, Musm; Perú
dc.description.fil
Fil: Antoine, Pierre Olivier. Laboratoire de Paléontologie, Ise-m; Francia
dc.journal.title
Palaeontologia Electronica
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://palaeo-electronica.org/content/pdfs/742.pdf
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