The Mentawai Archipelago rat lives on islands west of Sumatra. It has a dark back and paler flanks, and is reported from lowland evergreen forest.
Its fur is dense. The back is brownish black, the flanks are buff, and the underside is slate gray with a rusty stripe on the chest.
It is recorded in lowland tropical evergreen forest on the Mentawai Islands. The species page does not provide detailed information about its food or activity.
An extinction-risk assessment has not been added yet.