Rhinoderma is known from the cool, temperate forests of southern Chile and Argentina. The frogs are small, about 30 mm long. In Rhinoderma darwinii, the males carry the tadpoles in their vocal sacs, and development is completed as froglets. Rhinoderma has been placed in its own family Rhinodermatidae primarily because of its unusual mode of development. Were it not for this, Rhinoderma would be considered simply a genus within Hyloidea, but without obvious relationships to other taxa. No fossils are known.