Phyllotis osgoodi Mann, 1945 . Biologica, 2:81.

TYPE LOCALITY: Chile, Tarapaca Prov., Parinacota .

DISTRIBUTION: Altipiano of NE Chile.

COMMENTS: Relegated to synonymy under P. darwini (Hershkovitz, 1962; Pearson, 1958) but considerable evidence supports its validity as a species (Spotorno, 1976; Spotorno and Walker, 1979, 1983).