The San Juan Tuco-tuco has grayish fur. Specimens from Cañada Honda have a dark tuft at the tail tip. A record from San Juan describes holes in bare soil beneath trees in dry, sandy and stony terrain.
The back is greyish and the flanks paler. Specimens from Cañada Honda have whitish underparts, while those from Pedernal are cream-coloured below.
A collection note from San Juan records holes made in bare soil beneath trees.
There is a well-marked blackish patch over the nose.
In the topotype from Cañada Honda, a band of pale hairs extends from the base of the ear toward the cheek.
In the topotype from Cañada Honda, the tail tip is blackish above and paler below, with a conspicuous crest of hairs along its upper surface.
The upper surfaces of all four feet are covered in whitish hairs.
An extinction-risk assessment has not been added yet.