Sigmodon fulviventer J. A. Allen, 1889 . Bull. Am. Mus. Nat. Hist., 2:180.

TYPE LOCALITY: Mexico, Zacatecas, Zacatecas .

DISTRIBUTION: SE Arizona and WC New Mexico, USA, south through interior Mexico to Guanajuato and NW Michoacan.

SYNONYMS: dalquesti, goldmani, melanotis, minimus, woodi.

COMMENTS: See Baker and Shump (1978a, Mammalian Species, 94).