Abrawayaomys Cunha and Cruz, 1979 . Bol. Mus. Biol. Prof. Mello-Leitao Zool., 96:2.

TYPE SPECIES: Abrawayaomys ruschii Cunha and Cruz, 1979 .

COMMENTS: Diagnostic traits of the new genus seem to combine aspects of Neacomys, Oryzomys, and Akodon, and Reig (1987) acknowledged the enigmatic affinities of Abrawayaomys as Sigmodontinae incertae sedis. Certain cranial features of Abrawayaomys suggest an archaic thomasomyine, perhaps distantly related to other thomasomyine genera of SE Brazil (e.g., see comment under Delomys).