This is a robust rodent of the central Chilean Andes. Its back and flanks are slate gray with some brown, its belly is contrasting whitish gray, and its tail is distinctly two-colored.
It has a medium-sized, robust body. The back and flanks are lead gray with some brown, contrasting with whitish-gray underparts. The tail is clearly two-colored, with many short dark brown-gray hairs above and almost no tuft.
The original type locality is a plain in the central Chilean Andes, with thorny shrubs 0.5–1 m tall among grassland dominated by Poa holciformis.
An extinction-risk assessment has not been added yet.