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.
Callulops is a genus of microhylid frogs from Sulawesi as well as the New Guinea region, from Talaud Islands and the Maluku Islands (Moluccas) in the northwest to the Louisiade Archipelago in the east. They are medium- to large-sized terrestrial frogs inhabiting burrows on the forest floor, often under large rocks. Because their population densities can be low, and they are difficult to observe and collect owing to their lifestyle, many species are known only from few specimens.
Choerophryne tubercula is a species of frog in the family Microhylidae. It is endemic to Papua New Guinea and known from scattered locations in the New Guinea Highlands. However, the species is likely to occur also in the Indonesian part of New Guinea. Common name warty rainforest ground frog has been coined for it.
Callulops boettgeri, also known as Boettger's Callulops frog, is a species of frog in the family Microhylidae. It is endemic to Halmahera in the Maluku Islands of Indonesia. It is only known from the holotype collected from Galela in 1894. The genus-level placement of this little known frog has changed many times, and it is still unclear whether it should be placed in some other genus.
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 marmoratus is a species of frog in the family Microhylidae. It is endemic to Papua New Guinea and only known from its type locality, Crater Mountain Wildlife Management Area in the southwestern Chimbu Province, on the southern escarpment of the New Guinea Highlands.
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.
Callulops robustus is a species of frog in the family Microhylidae. It has traditionally been considered as wide-ranging species found in both Western New Guinea (Indonesia) and Papua New Guinea. However, it is likely that specimens from the type locality, Misima Island, and New Guinea represent different species. If so, name Callulops robustus belongs to the Misima Island species, and the mainland species is unnamed. Other island populations may or may not belong to Callulops robustus. Callulops microtis from the mainland has already been removed from synonymy with Callulops robustus.
Callulops sagittatus is a species of frog in the family Microhylidae. It is found in Papua New Guinea and possibly Indonesia. Its natural habitat is subtropical or tropical moist montane forests. It is threatened by habitat loss.
Callulops stictogaster is a species of frog in the family Microhylidae. It is endemic to New Guinea and occurs in the central mountain ranges of Papua New Guinea in the Western Highlands, Eastern Highlands, Chimbu, and Morobe Provinces. The specific name stictogaster is derived from the Greek stictos (="spotted") and gaster (="belly"). Common name Irumbofoie callulops frog has been proposed for it.
Callulops wilhelmanus is a species of frog in the family Microhylidae. It is endemic to the central mountain ranges of Papua New Guinea. Its natural habitats are dense, primary montane rainforest at elevations of 2,230–3,400 m (7,320–11,150 ft) above sea level. It lives on the forest floor. It can also adapt to live in degraded habitats, including rural gardens. It can be locally abundant although it does not typically occur at high densities.
Copiula tyleri is a species of frog in the family Microhylidae. It is endemic to northeastern New Guinea and is found in both Western New Guinea and Papua New Guinea. The specific name tyleri honours Michael J. Tyler, Australian herpetologist who have worked extensively with Australian and New Guinean frogs.
Sphenophryne thomsoni, sometimes known as Thomson's toothless frog, is a species of frog in the family Microhylidae. It is endemic to Papua New Guinea and occurs in the southeastern peninsular New Guinea, Louisiade Archipelago, d'Entrecasteaux Islands, and Woodlark Island. It was formerly in its own monotypic genus Genyophryne. The specific name thomsoni honours Basil Thomson, a British intelligence officer, police officer, prison governor, colonial administrator, and writer.
Hylophorbus rufescens is a species of frog in the family Microhylidae. It is endemic to New Guinea and some nearby islands, and occurs in both West Papua (Indonesia) and Papua New Guinea. Common name red Mawatta frog has been coined for it.
Oreophryne wapoga is a species of frog in the family Microhylidae. It is endemic to Western New Guinea (Indonesia) and is known from its type locality, the headwaters of the Wapoga River, and from the island of Papua (province), both in the Papua province. The Yapen population might represent a separate species.
Xenorhina zweifeli is a species of frog in the family Microhylidae. It is endemic to New Guinea and is only known from the Bewani and Hunstein Mountains in northern Papua New Guinea. The species is named for American herpetologist Richard G. Zweifel, a specialist in New Guinean herpetology and microhylid frogs; he is also said to share "characteristically terse vocalizations" with this frog.
Chirixalus doriae, commonly known as Doria's Asian treefrog, Doria's bush frog, Doria's bush frog, and Doria's tree frog, is a species of frog in the family Rhacophoridae. It is found in southeastern Asia, from extreme northeastern India and adjacent Bangladesh to Myanmar, Thailand, Cambodia, Laos, Vietnam, and southern China.
Cophixalus timidus is a species of frog in the family Microhylidae. It is endemic to Papua New Guinea. It is threatened by frequent fires set in its habitat.
Callulops mediodiscus is a species of frog in the family Microhylidae. It is only known from the type locality in the upper Kikori Basin in the Southern Highlands Province, Papua New Guinea. The specific name refers to its most distinctive feature, the moderately enlarged discs on fingers and toes, although their function remains unknown as the specimens were collected on or near the ground.
Callulops omnistriatus is a species of frog in the family Microhylidae. It is endemic to Papua New Guinea and is known from the southern slope of the Central Highlands, Southern Highlands Province. The type locality is in the vicinity of the Moro Airport.
