Thomasomys cinnameus Anthony 1924 Thomasomys cinnameus Anthony 1924, Am. Mus. Novit., 139: 5. Type Locality: Ecuador, Tungurahua Prov., east of Ambato, Hacienda San Francisco, 8000 ft (2438 m). Vernacular Names: Cinnamon-colored Thomasomys. Distribution: Cordillera Oriental, ca. 2400-3800 m, NC Ecuador (Tungurahua and Napo Provs.). Discussion: A small form described as a species by Anthony (1924), later treated as a synonym of T. gracilis (Cabrera, 1961; Musser and Carleton, 1993), but resurrected by Voss (2003), who amplified its unique traits as compared with T. gracilis and T. hudsoni.

Published as part of Wilson, Don E. & Reeder, DeeAnn, 2005, Order Rodentia - Family Cricetidae, pp. 955-1189 in Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 2, Baltimore :The Johns Hopkins University Press on page 1181, DOI: 10.5281/zenodo.7316535