This large rat occurs in the Andaman and Nicobar Islands. Its coarse fur and tail, which is shorter than its head and body, are notable features.
It is large and heavily built. The coarse back is grizzled black and dull ochre, while the underside is bluish gray. The tail is uniformly dark brown and shorter than the head and body.
The original account reports captures in dense jungle on Henry Lawrence Island. A 2005 national assessment lists tropical and subtropical evergreen forest as habitat.
An extinction-risk assessment has not been added yet.