The eastern Hyomys is a forest rat of New Guinea with shaggy dark fur and a long tail whose terminal half is white. It lives on the ground while also climbing readily.
Its coat is shaggy and dark gray to brown. The tail is about as long as the body, with the terminal half white.
It lives on the ground but climbs readily. It builds a leaf nest beneath tree roots and feeds on bamboo and other young plant shoots.
An extinction-risk assessment has not been added yet.