A New Species of Akodon (Muridae: Sigmodontinae) from Northwestern Argentina

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Abstract
A new species of Akodon is described using cranial, dental, and external morphology and morphometric data. The new species inhabits an isolated, ecotonal, montane forest-grassland area in central Tucumán Province, Argentina. This species, which appears to be closely related to A. puer caenosus, is here included in the boliviensis group of akodont rodents. Comparisons are made with A. spegazzinii and A. puer caenosus, which are found in the general area and are of similar body size and general morphology.

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