Ansonia is a genus of true toads found in south India, northern Thailand, Malay Peninsula, Tioman Island, Borneo, and Mindanao (Philippines). These small forest species spawn in streams and have torrent-adapted tadpoles. Common name stream toads has been coined for the genus, although individual species are also being referred to as slender toads.
Ansonia albomaculata, also known as the white-lipped slender toad and whitebelly stream toad, is a species of toad in the family Bufonidae. It is endemic to the island of Borneo and can be found in Sabah and Sarawak (Malaysia), Brunei, and northern Kalimantan (Indonesia).
Ansonia fuliginea, the North Borneo stream toad or North Borneo slender toad, is a species of toad in the family Bufonidae. It is endemic to Mount Kinabalu in Sabah, Malaysian Borneo.
Ansonia guibei is a species of toad in the family Bufonidae. It is endemic to northwestern Sabah in Malaysian Borneo. The specific name guibei honors Jean Guibé, a French zoologist and herpetologist. Common names Mesilau toad and Mesilau stream toad have been coined for it.
Ansonia hanitschi is a species of toad in the family Bufonidae. It is endemic to mountains of Borneo and found in both Malaysia and Indonesia . Its natural habitats are submontane and montane forests. It inhabits the forest floor. Breeding takes place in clear, rocky mountain streams. It is threatened by habitat loss.
Ansonia leptopus is a species of toad in the family Bufonidae. It is known from a few lowland localities in Borneo, Sumatra (Indonesia), and Peninsular Malaysia; it is reported as common in lowland Malaysian Borneo. Its presence in Peninsular Malaysia is uncertain. Its common names are brown slender toad, Matang stream toad, and cricket-voiced toad.
Ansonia longidigita is a species of toad in the family Bufonidae. It is endemic to northern and western Borneo in Sabah and Sarawak (Malaysia) and in Brunei.
Ansonia malayana is a species of toad in the family Bufonidae. It is also known as Malayan slender toad, Malaya stream toad, and pigmy false toad. It is found on the Malay Peninsula, from the Kra Isthmus (Thailand) southward to Peninsular Malaysia. However, its precise distribution in Thailand is poorly known as it may have been confused with Ansonia kraensis, described as a new species in 2005; it may also represent more than one species.
Ansonia minuta is a species of toad in the family Bufonidae, described from the forests of Sarawak in 1960. It is known by a number of common names: tiny stream toad, dwarf slender toad, and minute slender toad. It is endemic to Borneo and occurs in tropical moist lowland forests. It is threatened by habitat loss.
Ansonia platysoma, also known as the flat-bodied slender toad and Luidan stream toad, is a species of toad in the family Bufonidae. It is endemic to the island of Borneo and known from Sabah and Sarawak, Malaysia, and from Brunei. Its closest relative is Ansonia kelabitensis.
Ansonia torrentis, also known as the Gunung Mulu stream toad and torrent slender toad, is a species of toad in the family Bufonidae. It is endemic to Mount Mulu in Sarawak, Borneo (Malaysia). The specific name torrentis refers to the habitat at its type locality, a stream running down a steep mountainside.
Atelopus balios, the Rio Pescado stubfoot toad, is a species of toad in the family Bufonidae. It is endemic to southwestern Ecuador, with records from Pacific lowlands in Azuay, Cañar, and Guayas Provinces. It is a rare species that was already suspected to be extinct, but a single specimen was discovered in 2011 by a team from Conservation International during a hunt for missing amphibians. The decline in amphibian populations is well documented. The Atelopus balios is Critically Endangered as a result of the widespread amphibian Chytridiomycosis fungus that has decimated other amphibian populations. There are only 10 known findings of the tadpole, Atelopus balios.
Pelophryne api, also known as Api dwarf toad, is a species of toad in the family Bufonidae. It is endemic to Borneo and known from Gunung Mulu National Park in northern Sarawak and from Simpang Kuda in Bau District, western Sarawak. Its genetic divergence from Pelophryne guentheri is relatively low and these species could be conspecific.
Pelophryne misera, the black flathead toad or Kinabalu dwarf toad, is a species of toad in the family Bufonidae. It is endemic to northwestern Borneo and known from Sabah and Sarawak (Malaysia), although its distribution is likely to be broader and might extend to Kalimantan (Indonesia). It was first described from specimens collected from Mount Kinabalu.
Pelophryne rhopophilia, also known as lowland dwarf toad, is a species of toad in the family Bufonidae. It is endemic to Borneo and found in north-eastern and south-western Sarawak (Malaysia) and (likely) in adjacent West Kalimantan (Indonesia).
Ansonia kraensis is a species of toads in the family Bufonidae. It is found on the Kra Isthmus, Thailand. It is morphologically similar to Ansonia malayana from Malaysia, but differs from it in ventral coloration and larval morphology. The exact threats are unknown but are likely forest loss for logging and agricultural expansion.
Ansonia jeetsukumarani is a species of toads in the family Bufonidae. It is endemic to Peninsular Malaysia and known from its type locality, Fraser's Hill, and from Sungai Pergau. It is named in honour of Jeet Sukumaran, a biologist who has worked with Malaysian amphibians.
Ansonia echinata is a species of toads in the family Bufonidae. It is endemic to Sarawak, Borneo. Common name spiny slender toad has been coined for this little known species.
Ansonia vidua is a species of toads in the family Bufonidae. It is endemic to Sarawak, Borneo. Common names Murud black slender toad and widow slender toad have been coined for this little known species. The latter name refers to the black colouration of this species and the fact that no male individuals are known.
Ansonia teneritas, the gracile slender toad, is a species of toad in the family Bufonidae, described in 2016. It is endemic to central Sarawak in Malaysian Borneo and is only known from two isolated mountain ridges. Its name is derived from its slender body.
