Wiedomys Hershkovitz, 1959 . Proc. Biol. Soc. Washington, 72:5.

TYPE SPECIES: Mus pyrrhorhinos Wied-Neuwied, 1821 .

COMMENTS: Wiedomyine, a tribe formally diagnosed by Reig (1980) to contain the problematic form pyrrhorhinos, which has been variously classified as a species of Oryzomys or Thomasomys (see Tate, 1932/; Osgood, 1933d; and Hershkovitz, 1959b), and a new fossil genus, Cholomys, recovered from E Argentina.