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Taxonomic revision of Bolivian Juscelinomys (Rodentia, Cricetidae) with notes on morphology and ecology

1 / James L. Patton2

1Division of Mammals, Smithsonian Institution, NHB W630 MRC 108, Washington, DC 20013-7012, USA

2Museum of Vertebrate Zoology, University of California, Berkeley, CA 94720-3101, USA

Corresponding author

Citation Information: . Volume 76, Issue 3, Pages 285–294, ISSN (Online) 1864-1547, ISSN (Print) 0025-1461, DOI: 10.1515/mammalia-2012-0020, June 2012

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The genus Juscelinomys includes three species of rare, Cerrado-endemic Sigmodontine mice: one from Central Brazil, now listed as extinct (IUCN), and two from Bolivia, originally known only from their holotypes and listed as data deficient. Additional specimens of Bolivian Juscelinomys have provided a basis for review of morphological and DNA characters. From these, we conclude that the segregation of Juscelinomys into two Bolivian species cannot be justified, so we revise the genus to include only two named taxa: J. candango Moojen, 1965, from central Brazil and J. huanchacae Emmons, 1999, from eastern Bolivia. We provide emended diagnoses for the genus and for the Bolivian species. We present new morphological details of the feet, dentition, and stomach of J. huanchacae, and we provide notes on its ecology. Juscelinomys huanchacae occurred sporadically in both space and time during a long-term trapping program. This may account for the rarity of the genus in collections.

Keywords: Akodontini; Cerrado; dentition; Oxymycterus; Sigmodontinae, systematics

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