Pseudoryzomys Hershkovitz, 1962 . Fieldiana Zool., 31:208.

TYPE SPECIES: Oryzomys wavrini Thomas, 1921 (= Hesperomys simplex Winge, 1887).

COMMENTS: Associated with phyllotines by Hershkovitz (1962), but excluded from same by Olds and Anderson (1989). Oryzomyine characteristics illuminated by Voss and Myers (1991), who eschewed the "traditional phenetic practices of Neotropical muroid classification" and left the genus as Sigmodontinae incertae sedis pending phylogenetic studies of its tribal-level affinity. See Voss and Myers (1991:418) on the formal availability of the genus-group name.