Thomasomys ischyurus Osgood, 1914. Field Mus. Nat. Hist. Publ. Zool. Ser., 10(12): 162.

TYPE LOCALITY: Peru, Amazonas, 65 km east of Chachapoyas, Tambo Almirante, about 1500 m.

DISTRIBUTION: N.W. Peru; W. Ecuador.

COMMENT: Stomach morphology reviewed by Carleton, 1973, Misc. Publ. Mus. Zool, Univ. Mich., 146:1-43.

ISIS NUMBER: 5301410008055011001.