Proechimys oris Thomas, 1904 . Ann. Mag. Nat. Hist., ser. 7, 14: 105.

TYPE LOCALITY: Brazil, Para, Igarape-assu, near Belem .

DISTRIBUTION: C. Brazil.

COMMENT: Formerly included in guyannensis; see Reig et al., 1980:291-312, in Voronstov and Van Brink, eds., Animal genetics and evolution, Junk, The Hague.