Thomasomys cinereiventer J. A. Allen 1912
Thomasomys cinereiventer J. A. Allen 1912, Bull. Am. Mus . Nat. Hist., 31: 80.
Type Locality: Colombia, Cauca Dept., 40 mi (64 km) W Popayán, 10,340 ft (3152 m).
Vernacular Names: Ashy-bellied Thomasomys.
Synonyms: Thomasomys contradictus Anthony 1925; Thomasomys dispar Anthony 1925 .
Distribution: Upper Andean elevations in Colombia.
Conservation: IUCN – Lower Risk (lc).
Discussion: Formerly included erro as a subspecies (Cabrera, 1961); see below.