This small spiny mouse is recorded from French Guiana, southeastern Suriname, and northeastern Brazil.
The back is tawny to reddish and mixed with grooved spines tipped in dark color. The underside is pale buff to orange with a lighter side stripe. The mostly uniform tail is nearly as long as the head and body.
It has been recorded in creekside primary forest at Paracou.
At Saül in central French Guiana and other localities, it occurs alongside Neacomys paracou.
Head-and-body length is 64–81mm and tail length is 70–85mm.
An extinction-risk assessment has not been added yet.