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Tympanic membrane absent. Skin smooth. Sternum ossified. Pupil of the eye is vertical. Webs between the toes well-developed. Inner metatarsal tubercle of the hind fooot quite large and spade-shaped. No male resonators. Body robust, hind legs short, head large. Dorsal coloration is quite variable, from grey, brown, and yellowish to dark-brown or greenish, with small light spots. Sometimes the coloration is uniform. Belly light, with darker spots. The male is smaller than female. During the reproductive period the male possesses tubercles on the palms and forearms.