Hose's pygmy flying squirrel is a small gliding squirrel known from the eastern coast of Sarawak in northwestern Borneo. Its dark back, pale underside, and white spots behind the ears are distinctive.
It has large eyes and ears, dark fur on the back, and white fur underneath. The account also describes white spots behind the ears, pale cheeks, and a brown tail with a white tip.
It is strongly arboreal and has been found in lowland forest. It is nocturnal, and tree cavities have been reported as nest sites; one record found four individuals in the same cavity.
An extinction-risk assessment has not been added yet.