Platymantis isarog, sometimes known as the Isarog forest frog, is a species of frog in the family Ceratobatrachidae. It is endemic to southeastern Luzon, Philippines, where it is known from two volcanos, Mount Isarog (its type locality) and Mount Malinao. Description Adult males measure and adult females in snout–vent length. The snout is broadly rounded. The tympanum is distinct. The fingers have no webbing whereas the toes are webbed. The hind limbs are moderately long. The dorsum has grayish to orange brown background color and is marked with varied darker spots and blotches. Some specimens have a pale vertebral line starting from the beginning on the snout. The hind limbs have dark transverse bars. There are yellowish, brown-ringed s in the groin, on the thighs, and frequently the lower legs. The venter has brown spots or reticulations (this species was originally named as P. reticulatus in reference to the latter). Habitat and conservation Platymantis isarog is an arboreal frog that occurs in mossy and montane rainforests at elevations of above sea level. It deposits its eggs on leaves in shrub layer vegetation. The egg have direct development (i.e, there is no free-living larval stage). This species is common in mid- to upper-montane forests on Mount Isarog, and the population there appears to be stable; it is well-protected by the Mount Isarog National Park. There is geothermal power generation on the slopes of Mount Malinao, but its impact is limited. Thus, despite its limited distribution, this species is not considered threatened by the IUCN SSC Amphibian Specialist Group. References isarog Amphibians of the Philippines Endemic fauna of the Philippines Fauna of Luzon Amphibians described in 1997 Taxa named by Angel Chua Alcala Taxa named by Rafe M. Brown Taxa named by Walter Creighton Brown Taxa named by Darrel Frost Taxonomy articles created by Polbot