Microhyla borneensis (junior synonymMicrohyla nepenthicola), also known as the Matang narrow-mouthed frog, is a species of microhylidfrog found in the Matang Range in Sarawak, Borneo.[2][3] It was once the smallest known frog from the Old World[4][5] (since 2012, the record holder has been Paedophryne amauensis from New Guinea[6]). Adult males of this species generally have a snout–vent length (SVL) in the range of 10.6–12.8 mm (0.42–0.50 in),[7] but may reach a maximum of 13 mm (0.51 in). Adult females have an SVL of 16–19 mm (0.63–0.75 in).[3][8] The tadpoles measure just 3 mm.[9]
^Frost, Darrel R. (2015). "Microhyla borneensis Parker, 1928". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. Retrieved 23 November 2015.