The Microhylidae, commonly known as narrow-mouthed frogs, are a geographically widespread family of frogs. The 683 species are in 63 genera and 11 subfamilies, which is the largest number of genera of any frog family.
Hylophorbus is a genus of microhylid frogs endemic to New Guinea. Common name Mawatta frogs has been coined for them.
Choerophryne fafniri is a species of frog in the family Microhylidae. It is endemic to Papua New Guinea and is only known from the north-western slopes of Mount Giluwe and south-east of Mount Hagen in the Southern Highlands Province.
Austrochaperina novaebritanniae is a species of frog in the family Microhylidae. It is endemic to the island of New Britain, Papua New Guinea. It is restricted to the northeastern part of the island where it occurs in lowland rainforests at elevations of 350–1,000 m (1,150–3,280 ft) above sea level. It has also been found in a recently cleared rainforest. It is threatened by the logging of lowland forest but can be locally abundant.
Barygenys atra is a species of frog in the family Microhylidae. It is endemic to eastern New Guinea and is known from the Morobe and Northern Provinces, Papua New Guinea. Common name Gunther's Papua frog has been proposed for it.
Barygenys cheesmanae is a species of frogs in the family Microhylidae. It is endemic to eastern New Guinea and is only known from Mount Tafa in Central Province, Papua New Guinea. The specific name cheesmanae honors Lucy Evelyn Cheesman, an English entomologist, explorer, curator at London Zoo, and collector of the holotype. Common name Cheesman's Papua frog has been coined for this species.
Barygenys exsul is a species of frog in the family Microhylidae. It is endemic to Papua New Guinea. It is known from Rossel and Sudest Islands in the Louisiade Archipelago, east of New Guinea. It is uncertain whether the specimens from Sudest really are conspecific with this species. Barygenys apodasta and Barygenys resima were mixed with this species prior to their description in 2013.
Asterophrys eurydactyla is a species of frog in the family Microhylidae. It is endemic to New Guinea and known from the Onin Peninsula in Western New Guinea (Indonesia), and from the Star Mountains in the Western Province in Papua New Guinea, close to the border with Western New Guinea; there are some doubts whether this easternmost record is conspecific with A. eurydactyla. Common name Danowaria callulops frog has been proposed for this species.
Callulops personatus is a species of frog in the family Microhylidae. It is endemic to the northern lowlands of central New Guinea and occurs in both Western New Guinea (Indonesia) and Papua New Guinea. The specific name personatus is Latin adjective meaning "masked", in reference to the head coloration. Common name Maprik callulops frog has been proposed for it.
Cophixalus tagulensis is a species of frog in the family Microhylidae. It is endemic to Papua New Guinea and only known from the Tagula Island in the Louisiade Archipelago, east of New Guinea. It is only known from the type series of three specimens collected in 1956.
Cophixalus verecundus is a species of frog in the family Microhylidae. It is endemic to New Guinea in Papua New Guinea, where it is only known around Mt. Bellamy in Owen Stanley Mountains though it may more widely distributed.
Hylophorbus richardsi is a species of frog in the family Microhylidae.
Sphenophryne rubra is a species of frog in the family Microhylidae. It is endemic to New Guinea and is only known from the Kubor and Bismarck Ranges in the New Guinea Highlands, Papua New Guinea. The habitat and ecology of this species known from very few specimens are unknown.
Hylophorbus infulatus is a species of frog in the family Microhylidae. It is endemic to New Guinea and known from its type locality, Arau in the Kratke Mountains, as well as from the Adelbert Range, both in Papua New Guinea. Common name Arau archipelago frog has been proposed for it.
Oreophryne biroi is a species of frog in the family Microhylidae. It is endemic to New Guinea and occurs on the north coast from Madang Province in Papua New Guinea to the Cyclops Mountains in Papua province, Western New Guinea (Indonesia). The specific name biroi honours Lajos Bíró, a Hungarian zoologist and ethnographer who collected the holotype. Common name New Guinea cross frog has been coined for it.
Sphenophryne crassa is a species of frog in the family Microhylidae. It is endemic to eastern New Guinea and is known from the Mount Dayman and Mount Simpson in the Owen Stanley Range, Papua New Guinea. Common name Papua land frog has been proposed for it.
Mantophryne menziesi, commonly known as the Iarowari School frog, is a species of frog in the family Microhylidae. It is endemic to New Guinea and is only known from near Port Moresby, Papua New Guinea. The actual limits of its distribution are poorly known.
Sphenophryne cornuta is a species of frogs in the family Microhylidae. It is endemic to New Guinea where it is widespread and found both in the Western New Guinea (Indonesia) and Papua New Guinea. Common name horned land frog has been proposed for it.
Xenorhina bidens is a species of frog in the family Microhylidae. It is endemic to New Guinea and found between Lorentz River in the west and Fly River in the east, thus being present in both West Papua (Indonesia) and Papua New Guinea. Common name Digul River fanged frog has been coined for it, in reference to Digul River where the type series was collected in 1904 or 1905.
Hylophorbus proekes is a species of frog in the family Microhylidae. It is endemic to Papua New Guinea and only known from the vicinity of its type locality on the southern slope of Mount Sapau in the Torricelli Mountains, West Sepik Province.
