This tree mouse is known only from Siberut and North Pagai in Indonesia's Mentawai Islands. The species account has no information on its diet or breeding.
The back is dark grayish brown, the sides are grayer, and the underside is pale gray. Its long tail ends in a brush-like tuft of white hair.
It lives in tropical primary lowland forest, uses trees, and is thought to be mainly active at night. The source has no diet or breeding information.
An extinction-risk assessment has not been added yet.