The White-toothed Brush Mouse is a small rodent from high mountains of western New Guinea. It has thick brown fur, white incisors and a slender tail longer than its head and body.
Its coat is thick, soft, and woolly, with buffy-brown upperparts. Much of the visible front surface of the incisors is covered in white enamel.
It was collected near Lake Habbema at 3,225 m in August 1938 and in the Bele River valley at 2,800 m in October of the same year.
Dark-brown rings surround the eyes, and long whiskers grow on the face. The large, dark-brown ears have fine short hairs on both surfaces.
The slender tail is longer than the head and body together. In five adult specimens, it measured 121–146% of head-and-body length. The tail is brownish grey and covered with small scales and hairs.
The soft, dense fur of the underside varies from whitish grey to ochraceous grey, from the chin to the base of the tail.
An extinction-risk assessment has not been added yet.