The Mentawai Flying Squirrel has dark brown fur on its back and paler gray underparts. It occurs on Sipora and North Pagai islands west of Sumatra, in mature forest below 500 m.
The back is dark brown and the underside is light slate-gray. Buff hairs edge the limbs and gliding membrane, the ears are bare, and the tail is darker than the body.
It lives in mature subtropical and tropical forest below 500 m and is nocturnal. The treatment says that its food and detailed activity patterns are unknown.
An extinction-risk assessment has not been added yet.