The earless water rat is a New Guinea rodent, part of the Hydromys group of the subfamily of Old World rats and mice (Murinae). It is the only species of the genus Crossomys. This species is probably most closely related to Baiyankamys. It is still unclear to which species this group is related. It is one of the most aquatically adapted rodents of the world.
Leptomys is a genus of rodent endemic to New Guinea. It is considered part of the New Guinea Old Endemics, meaning it was part of the first wave of murine rodents to colonize the island.
The squirrel-toothed rat, also known as the New Guinea giant rat, powerful-toothed rat, uneven-toothed rat, or narrow-toothed giant rat, is a species of rodent in the family Muridae. It is the only species in the genus Anisomys and is found in New Guinea.
Ernst Mayr's water rat is a species of rodent in the family Muridae, named for evolutionary biologist Ernst Mayr. It is found in the Foja Mountains of Papua Province, Indonesia, and in the mountains of northeastern Papua New Guinea.
The Fly River water rat is a species of rodent in the family Muridae. It is found only in Papua New Guinea. Its natural habitat is subtropical or tropical dry forests. It is threatened by habitat loss.
The long-nosed mosaic-tailed rat or Papuan lowland paramelomys is a species of rodent in the family Muridae. It is found only in Papua New Guinea.
Lorentz's mosaic-tailed rat is a species of rodent in the family Muridae. It is found in West Papua, Indonesia and Papua New Guinea. The rat is named after Hendrikus Albertus Lorentz, a Dutch explorer who passed through Lorentz National Park on his 1909–10 expedition.
The mountain mosaic-tailed rat is a species of rodent in the family Muridae. It is found in West Papua, Indonesia and Papua New Guinea.
Musser's shrew mouse is a species of rodent in the family Muridae. It is found only in Papua New Guinea. Its natural habitat is subtropical or tropical moist montane forests.
The northern water rat is an endangered species of rodent in the family Muridae found in the highlands of New Guinea.
The short-haired water rat is a species of rodent in the family Muridae. It is found in West Papua, Indonesia and Papua New Guinea. There are two currently undescribed species allied with this taxon.
The large New Guinea spiny rat is a species of rodent in the family Muridae. It is found in Indonesia, Papua New Guinea, and the Solomon Islands.
The moss-forest rat is a species of rodent in the family Muridae. It is found in Indonesia and Papua New Guinea.
The slender rat is a species of rodent in the family Muridae. It is found in West Papua, Indonesia and Papua New Guinea.
German's one-toothed moss mouse is a species of rodent in the family Muridae which occurs in the mountains of southeastern New Guinea.
Baiyankamys is a genus of amphibious murid rodents. It was originally described, along with the species Baiyankamys shawmayeri by Hinton in 1943 after he found the remains of a single individual in south east of the Bismarck Mountain Range, north east New Guinea. Tate, in 1951 and, Laurie and Hill in 1954, confirmed the existence of both the species and genus.
Leptomys paulus is a small rodent belonging to the family Muridae endemic to New Guinea.
Leptomys arfakensis is a species of rodent in the family of Muridae. It is found in the Arfak Mountains of West Papua, Indonesia.
Dollman's melomys is a species of rodent from the family Muridae. It lives in the eastern highlands of Papua New Guinea at an elevation of at least 1,200 metres (3,900 ft) and on the slopes of Mount Hagen and Mount Sisa. However, it is not found east of the Okapa area. It is an arboreal species occurring in montane secondary and degraded forest, preferring moist tropical environments. Formerly considered to be a subspecies of the black-tailed mosaic-tailed rat, the Dollman's melomys is also often listed as its binomial synonym, Melomys gracilis. The melomys is listed as Least Concern by the IUCN Red List due to its wide range, lack of threats, and tolerance of disturbance.
Hydromyini is a very large, diverse tribe of muroid rodents in the subfamily Murinae. They are the dominant native rodents in Australasia and one of only two native rodent groups there, the other being the genus Rattus in the tribe Rattini. They are also found in parts of Southeast Asia.
