Strabomantis cornutus is a species of frog in the family Craugastoridae. It is found along the eastern flank of the Andes of Ecuador and Colombia (Cordillera Oriental) north to Caquetá Department. Common name Rio Suno robber frog has been coined for it. It has been confused with other species (e.g., Strabomantis sulcatus ).
Adult males measure about 36–43 mm (1.4–1.7 in) (based on two young males) and adult females at least 54 mm (2.1 in) in snout–vent length (size of a young female). The snout is truncate in lateral profile. The tympanum is prominent. Skin is prominently tuberculate dorsally and smooth ventrally. The eyelid bears 1–2 elongated tubercles. The finger and toe discs are small; the toes have lateral fringes but no webbing. The dorsum is dull reddish brown or dull olive-brown with black and reddish brown markings. The venter is dark brown or brown dotted with (grayish) white. The posterior surfaces of the thighs are black with white or blueish white flecks.
