Notiomys edwardsii Thomas, 1890 . In Milne-Edwards, Mission Sci. Cap. Horn, 1882-3, 6, Mamm., p. 24.

TYPE LOCALITY: Argentina, Santa Cruz Prov., south of Santa Cruz, near 50°S latitude .

DISTRIBUTION: S Argentina, from Rio Negro Prov. to Santa Cruz Prov.

COMMENTS: Known by only six specimens; morphology and habits amplified by Pearson (1984).