Heteromys oresterus Harris, 1932 . Occas. Pap. Mus. Zool., Univ. Michigan, 248:4.

TYPE LOCALITY: Costa Rica, Cordillera de Talamanca, El Copey de Dota, 6,000 ft. (1,829 m) .

DISTRIBUTION: Talamanca Range of Costa Rica.

COMMENTS: Hall (1981) placed oresterus in the subgenus Xylomys but Rogers (1989, 1990) presented evidence that oresterus was not closely related to nelsoni, the type species of Xylomys . Reviewed by Rogers and Rogers (1992a, Mammalian Species, 396).