Rhagomys Thomas, 1917 . Ann. Mag. Nat. Hist., ser. 8, 20: 192.

TYPE SPECIES: Hesperomys rufescens Thomas, 1886 .

COMMENTS: Generic affinities uncertain: originally allied with Oryzomys-Oecomys (Thomas, 1917c), or included among oryzomyine genera (Tate, 1932/), or listed as Sigmodontinae incertae sedis (Reig, 1980, 1984).