Males measure 20–25 mm (0.79–0.98 in) in snout–vent length; females are larger. They have a slender body. The dorsal colour is dark brown with an X-shaped lighter area. There line between the darker dorsal parts and the white or cream-coloured belly is quite sharp. The belly has also black spots. The skin has warts bearing a small keratinized spine; the larger warts may be red. The fingers are truncate and have fleshy webbing.
