Taxonomy
In 2021, nine species of ''Microhyla'' were moved to ''Nanohyla'' on the basis of morphological and phylogenetic differences. ''Microhyla pulverata'' was found to be a junior synonym of ''Nanohyla marmorata'' based on phylogenetic evidence.Diagnosis
According to Seshadri et al. (2016), this genus can be diagnosed using the following set of criteria: Adult frogs are of small size; pupil circular; skin on dorsum smooth; lateral side of body with markings from back of eye to vent; supratympanic fold present in adults; paratoid glands are absent, fingers without webbing, finger tips may or may not be dilated; oval tongue, its margin is entire and free at the base; the diameter of eye is smaller than snout; a thin layer of skin hides the tympanum; tubercles on hand distinct; distinct oval shaped inner metatarsal tubercle and rounded outer metatarsal tubercle; webbing in feet, rudimentary.Evolutionary relationships
The genus ''Microhyla'' is closely related to ''Glyphoglossus'' within the family Microhylidae. Members of the genus ''Microhyla'' began diversifying from the most common ancestor around 45 million years ago and this resulted in forming ''Metaphrynella'' and ''Microhyla''. However, ascertaining the phylogenetic relationship of frogs within ''Microhyla'' has been difficult as many species are not monophyletic. A 2021 study on the relationship between ''Microhyla'' and ''Glyphoglossus'' found that nine species within ''Microhyla'' actually belong to a separate lineage. They have been subsequently moved to the new genus, ''Nanohyla''.Species
The following species are recognised in the genus ''Microhyla'': In central Vietnam, several new species of ''Microhyla'' have been described in the 2000s: *''Microhyla darevskii'': Mount Ngọc Linh, Kon Tum Province *''Microhyla minuta'': Đồng Nai Province *''Microhyla pineticola'': Lâm Đồng Province and Đắk Lắk Province Several new species of ''Microhyla'' have been described since 2018.Phylogeny
The following phylogeny of the genus ''Microhyla'' is from Khatiwada, et al. (2017). 27 species are listed, including various newly described species from South Asia. (Note: the chart below includes some species that have since been moved to ''Nanohyla'' including ''N. annectens'' and ''N. perparva''.)References
External links
* {{Taxonbar, from=Q2108367 Microhyla, Microhylidae Amphibians of Asia Amphibian genera Taxa named by Johann Jakob von Tschudi