A New Species of <i>Phyllotis</i> (Rodentia, Cricetidae, Sigmondontinae) from the Upper Montane Forest of the Yungas of Northwestern Argentina

J. Pablo Jayat, Guillermo D’Elía, Ulyses F. J. Pardiñas and Juan G. Namen

in The Quintessential Naturalist

Published by University of California Press

Published in print July 2007 | ISBN: 9780520098596
Published online March 2012 | e-ISBN: 9780520916159 | DOI:
A New Species of Phyllotis (Rodentia, Cricetidae, Sigmondontinae) from the Upper Montane Forest of the Yungas of Northwestern Argentina

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This chapter describes a new sigmodontine species of the genus Phyllotis and was collected near Hualinchay, Tucumán, Argentina. It observes that the new species, which is a sister taxon to P. osilae, can be distinguished from other members of the genus by the following combination of traits: large size (slightly smaller that P. osilae and P. xanthopygus); dorsal color dark gray; light ochraceous belly; ears covered internally and externally by obscure brown hairs; manus with digits and distal dorsum covered with white hair, proximal dorsum of the manus and pes darker; tail slightly bicolored and slightly haired; not penicillate; incisors with white to yellowish-white enamel; noticeably hypsodont molars; and several molecular synapomorphies. The chapter notes that the new species is an endemic from the older forests of the upper Yungas. It observes that the low number of specimens captured, despite intensive trapping efforts, suggests that it is rare and restricted to this type of forest.

Keywords: sigmodontine species; Phyllotis; Hualinchay; Tucumán; Argentina; taxon; P. osilae; P. xanthopygus; upper Yungas

Chapter.  8742 words.  Illustrated.

Subjects: Zoology and Animal Sciences

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