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.[1] [2]
Osornophryne sumacoensis females measure about 32.5mm 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.[2]
Osornophryne sumacoensis can be active both day and night. It is a terrestrial species. During the daytime specimens have been found under leaf-litter.[2]
Osornophryne sumacoensis has direct development. Eggs are laid on soil under vegetation.
Osornophryne sumacoensis inhabits the cloud forest surrounding the lake, at 2500m-2800mm (8,200feet-9,200feetm) asl. The forest is dominated by bamboo (Chusquea sp.), Ficus, and other trees up to 20m (70feet) tall.[2]
The species lives within the Sumaco Napo-Galeras National Park. Volcanic eruption is a threat to this species restricted to a single location.