Neacomys Thomas, 1900 . Ann. Mag. Nat. Hist., ser. 7, 5:153.

TYPE SPECIES: Hesperomys spinosus Thomas, 1882 .

COMMENTS: Oryzomyine. Recent revisionary standard lacking other than regional review of Lawrence (1941) and faunal checklists (e.g., Handley, 1966a, 1976; Husson, 1978). Traits for species recognition and distributional limits poorly delineated.