Plethodontohyla alluaudi is a species of frog in the Microhylidae family. The more accepted scientific name of this species is Rhombophryne alluaudi. It is endemic to Madagascar. Its natural habitats are subtropical or tropical moist lowland forests and subtropical or tropical moist montane forests. While not much else is known about this species, it is believed that, for breeding, it is by larval development out of water. It is threatened by habitat loss and invasive species.