Thomasomys pyrrhonotus Thomas, 1886 . Ann. Mag. Nat. Hist., ser. 5, 18:421.

TYPE LOCALITY: Peru, Cajamarca Dept., Rio Malleta, Tambillo, 5800 ft .

DISTRIBUTION: Andes of S Ecuador and NW Peru.

SYNONYMS: auricularis .

COMMENTS: Morphology redescribed and additional specimens reported by Pine (19806).