Mallomys is a genus of rodent in the family Muridae.[1] The name of the genus is formed from the Greek μαλλός, mallos, wool, and μῦς, mus, mouse/rat. These very large rats weigh between 0.95 and 2 kilograms (2.1 and 4.4 lb) and are native to highlands in New Guinea.[2] Little is known about their behavior, but they are believed to feed on leaves, grasses and other plant material.[2]