Oxymycterus nasutus (Waterhouse, 1837) . Proc. Zool. Soc. Lond., 1837:16.

TYPE LOCALITY: Uruguay, Maldonado .

DISTRIBUTION: Uruguay and adjacent SE Brazil.

COMMENTS: Comparisons with O. iheringi provided by Massoia and Fornes (1969); they (and Vitullo et al., 1986) further noted the distinction of O. nasutus from O. rufus, under which it had been ranked as a subspecies (Cabrera, 1961). Range limits unknown.