The Microhylidae, commonly known as narrow-mouthed frogs, are a geographically widespread family of frogs. The 683 species are in 57 genera and 11 subfamilies.
Cophylinae is a subfamily of microhylid frogs endemic to Madagascar. It has over 100 species in eight genera. Members of this subfamily range from minute to fairly large, and they are highly ecologically diverse. DNA barcode research has revealed a significant taxonomic gap in this subfamily, and an estimated 70+ candidate species were identified. Many of these have subsequently been described, as well as numerous new discoveries.
Anodonthyla is a genus of microhylid frogs endemic to Madagascar. Molecular data suggest that it is the sister taxon to all other species in the subfamily Cophylinae.
Stumpffia is a genus of microhylid frogs that are endemic to Madagascar. They are mostly brown frogs that typically live among leaf litter. S. contumelia has a snout–vent length of about 8–9 mm (0.31–0.35 in), making it one of the world's smallest frogs, and several others in the genus are only slightly larger. The largest species is no more than 28 mm (1.1 in).
Mantophryne is a genus of microhylid frogs. The genus is found in New Guinea, Louisiade Archipelago, and Woodlark Island.
Aphantophryne is a genus of microhylid frogs found in New Guinea and in Mindanao, the Philippines. Originally described by Fry in 1917, Richard G. Zweifel considered in 1956 Aphantophryne synonymous to Cophixalus. The genus was resurrected in 1989 to house two new species in addition to the type species, A. pansa. A molecular study on the subfamily Asterophryinae in 2017 revealed that two species originally included in the genus Oreophryne were more closely related to Aphantophryne than to other Oreophryne, and were consequently moved to this genus. The study also revealed a number of undescribed species.
Austrochaperina is a genus of microhylid frogs found on New Guinea, New Britain and Australia.
Cophixalus is a genus of microhylid frogs. These are arboreal species with expanded toe-pads, endemic to Moluccan Islands, New Guinea and northeastern Queensland, Australia.
Copiula is a genus of microhylid frogs endemic to New Guinea. The common name Mehely frogs has been coined for them. They are leaf-litter inhabitants.
Ctenophryne is a genus of microhylid frogs. They occur in southern Central America and South America. Their common names are egg frogs and Nelson frogs, the latter applying to species in the formerly recognized Nelsonophryne.
Kalophrynus is a genus of microhylid frogs. It is the only genus in the subfamily Kalophryninae. The species in this genus are found in southern China, in Southeast Asia to Java and Philippines, and in Assam, India.
Kaloula is a genus of microhylid frogs found in southern and eastern Asia. They are sometimes known as the Asian narrowmouth toads.
Metaphrynella is a small genus of microhylid frogs from the southern Malay Peninsula and Borneo. They are sometimes known as the Borneo treefrogs or tree hole frogs. The common name refers to the microhabitat of these frogs: males call from tree holes and tadpoles develop in the water contained in those holes.
Uperodon is a genus of microhylid frogs. They occur in South Asia and Myanmar. Uperodon reached its current composition in 2016 when the genus Ramanella was brought into its synonymy. The common names of these frogs are globular frogs and balloon frogs in reference to their stout appearance, or dot frogs, the last specifically referring to the former Ramanella.
Hamptophryne is a small genus of microhylid frogs from South America. The genus was previously monotypic, but because of the close phylogenetic relationship between Hamptophryne and Altigius, another monotypic genus, the latter was placed in synonymy with Hamptophryne in 2012.
The Brazilian gold frog, also known as Izecksohn's toad or flea-frog, is a very small species of frogs in the family Brachycephalidae. It is endemic to southeastern Brazil and is known from the central part of the state of Rio de Janeiro and from Serra das Torres in extreme southern Espírito Santo.
Vietnamophryne is a divergent genus of Asterophryinae frogs found in Indochina. Its closest relative is the genus Siamophryne. The genus Vietnamophryne was first described by Poyarkov, et al. (2018).
Vietnamophryne orlovi is a species of microhylid frog endemic to northern Vietnam. Its type locality is Phia Oac-Phia Den National Park, Cao Bang Province, northern Vietnam.
Vietnamophryne occidentalis is a species of microhylid frog endemic to northern Thailand. Its type locality is Doi Tung Mountain, Chiang Rai Province, northern Thailand.
Sphenophryne is a genus of frogs in the family Microhylidae from New Guinea. It reached its current composition in 2017 when Rivera and colleagues brought the genera Genyophryne, Liophryne, and Oxydactyla into synonymy of the then-monotypic Sphenophryne. However, the AmphibiaWeb continues to recognize these genera as valid.
