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Phylogenetic affinities of the late Miocene echimyid †Pampamys emmonsae Verzi, Vucetich, and Montalvo, 1995 (Huayquerian South American Land Mammal Age, central Argentina), were analyzed. In the most-parsimonious tree obtained, subfamilies of Echimyidae were nonmonophyletic (except for Dactylomyinae). Two major clades were recovered. One of them included the living fossorial Eumysopinae and the extinct †Theridomysops. The other clade grouped the terrestrial eumysopines Thrichomys (punaré) and Proechimys - Trinomys (spiny rats), and the arboreal eumysopines Mesomys (spiny tree-rats) + Echimyinae - Dactylomyinae. †Pampamys was the sister genus of Thrichomys, suggesting the Huayquerian South American Land Mammal Age (>6.0 million years ago [mya] by biochronology) as a minimum age for the origin of the living genus. Both major echimyid clades recognized here are represented by simplified-molared species in the Huayquerian South American Land Mammal Age. This would be related to the expansion of open environments during the late Miocene, and the geographical bias of the fossiliferous Huayquerian deposits exposed mostly in southern South America. © 2012 American Society of Mammalogists.


Documento: Artículo
Título:Phylogenetic affinities of the late Miocene echimyid †pampamys and the age of Thrichomys (Rodentia, Hystricognathi)
Autor:Olivares, A.I.; Verzi, D.H.; Vucetich, M.G.; Montalvo, C.I.
Filiación:Sección Mastozoología, División Zoología Vertebrados, Universidad Nacional de la Plata, Paseo del Bosque s/n, CP 1900 La Plata, Buenos Aires, Argentina
División Paleontología Vertebrados, Facultad de Ciencias Naturales y Museo, Universidad Nacional de la Plata, Paseo del Bosque s/n, CP 1900 La Plata, Buenos Aires, Argentina
Facultad de Ciencias Exactas y Naturales, Universidad Nacional de la Pampa, CP 6300 Santa Rosa, La Pampa, Argentina
Idioma: Inglés
Palabras clave:caviomorph; Echimyidae; late Miocene; phylogeny; South America; age class; cladistics; fossil record; Miocene; morphology; paleobiology; phylogeny; range expansion; rodent; taxonomy; Argentina; Caviomorpha; Dactylomyinae; Echimyidae; Echimyinae; Eumysopinae; Hystricognathi; Mammalia; Mesomys; Mesomys hispidus; Mya; Pampamys; Proechimys; Rattus; Rodentia; Theridomysops; Thrichomys; Thrichomys apereoides; Trinomys
Página de inicio:76
Página de fin:86
Título revista:Journal of Mammalogy
Título revista abreviado:J. Mammal.


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---------- APA ----------
Olivares, A.I., Verzi, D.H., Vucetich, M.G. & Montalvo, C.I. (2012) . Phylogenetic affinities of the late Miocene echimyid †pampamys and the age of Thrichomys (Rodentia, Hystricognathi). Journal of Mammalogy, 93(1), 76-86.
---------- CHICAGO ----------
Olivares, A.I., Verzi, D.H., Vucetich, M.G., Montalvo, C.I. "Phylogenetic affinities of the late Miocene echimyid †pampamys and the age of Thrichomys (Rodentia, Hystricognathi)" . Journal of Mammalogy 93, no. 1 (2012) : 76-86.
---------- MLA ----------
Olivares, A.I., Verzi, D.H., Vucetich, M.G., Montalvo, C.I. "Phylogenetic affinities of the late Miocene echimyid †pampamys and the age of Thrichomys (Rodentia, Hystricognathi)" . Journal of Mammalogy, vol. 93, no. 1, 2012, pp. 76-86.
---------- VANCOUVER ----------
Olivares, A.I., Verzi, D.H., Vucetich, M.G., Montalvo, C.I. Phylogenetic affinities of the late Miocene echimyid †pampamys and the age of Thrichomys (Rodentia, Hystricognathi). J. Mammal. 2012;93(1):76-86.