期刊
JOURNAL OF MAMMALOGY
卷 95, 期 2, 页码 201-215出版社
OXFORD UNIV PRESS INC
DOI: 10.1644/13-MAMM-A-208
关键词
Brazil; Calomys; Cerrado; Cricetidae; Sigmodontinae
类别
资金
- Agencia Nacional de Promocion Cientifica y Tecnologica [PICT 2008-547]
- CONICET
- American Philosophical Society
- Systematics Research Fund of the Systematics Association
- Texas Tech University
- IBAMA
- Fundacao Boticario
- FIP PUC Minas
- PROBIC PUC Minas
We describe a new living genus and species of Sigmodontinae currently only known from the Brazilian National Park Sempre Vivas, Minas Gerais State. This rodent is characterized by a unique combination of traits that include, among others, a long tail, with its distal tip (approximately 2.5 to 5 cm) entirely white; skull with domed profile; long rostrum with an incipient rostral tube; and noticeable small brachyodont molars with reduced mesolophs and mesostyles present on the 1st and 2nd upper molars. Cladistic analyses of molecular (1 mitochondrial and 1 nuclear marker) and morphological characters indicate that the new genus belongs to the Phyllotini and is sister to the remainder genera of this tribe. However, contrary to other known phyllotines, the new genus shows vestigial mesolophs and mesostyles. Phyllotines are widespread in open areas, in particular desert and semideserts, mostly in the western portion of South America. The new genus described herein expands the diversity of the tribe and suggests an ancient event of diversification in eastern Brazil.
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