Scapteromys Waterhouse, 1837 . Proc. Zool. Soc. Lond., 1837:20.

TYPE SPECIES: Mus tumidus Waterhouse, 1837 .

COMMENTS: Scapteromyine. Hershkovitz (1966c) removed tomentosus and fronto to Kunsia, the presumed cognate genus of Scapteromys, and Massoia (1980a) transferred labiosus to Bibimys . Karyology summarized by Gardner and Patton (1976).