Oryzomys buccinatus (Olfers, 1818) . In Eschwege, J. Brasilien, Neue Bibliothek. Reisenb., 15:209.

TYPE LOCALITY: Paraguay, Caraguatay Dept., 45 km east of Asunción, Atyra .

DISTRIBUTION: E Paraguay and NE Argentina.

SYNONYMS: angouya (of Desmarest, 1819), anguya.

COMMENTS: Level of differentiation from O. subflavus of E Brazil requires study. Hershkovitz (1959a) mistakenly included O. ratticeps within O. buccinatus, but the two species co-occur in E Paraguay (Cabrera, 1961; Myers, 1982). As with other names based on Azara's (1801) characterizations, the clear fixation of this name to a species morphology and the proper usage of angouya Fischer, 1814, versus buccinatus Olfers, 1818, should be formally established.