Osornophryne sumacoensis is a species of toad in the family Bufonidae. It is endemic to the Ecuador and only found in the forests surrounding a small crater lake on the eastern slopes of Sumaco, a volcano in the Napo Province. Description Osornophryne sumacoensis females measure about in snout–vent length (mean of three individuals). Skin has many tubercles. The back and limbs are blueish-black, but the belly is blue with black spots. Head is small. Osornophryne sumacoensis can be active both day and night. It is a terrestrial species. During the daytime specimens have been found under leaf-litter. Reproduction Osornophryne sumacoensis has direct development. Eggs are laid on soil under vegetation. Habitat and conservation Osornophryne sumacoensis inhabits the cloud forest surrounding the lake, at asl. The forest is dominated by bamboo (Chusquea sp.), Ficus, and other trees up to tall. The species lives within the Sumaco Napo-Galeras National Park. Volcanic eruption is a threat to this species restricted to a single location. References sumacoensis Amphibians of Ecuador Endemic fauna of Ecuador Amphibians described in 1995 Taxonomy articles created by Polbot