Bufo asper has a large and stout body. The females have a snout-vent length of 95-140 mm, while the males have a snout-vent length of 70-100 mm. The skin is covered with warts or tubercles the name of this species derives from its rough skin texture. The head is broad and blunt, without bony crests. This toad has an ovoid parotoid gland connected to the supraorbital ridge by a supratympanic ridge. The tympanum is visible. The hands and feet are spinous. The fourth toe is the longest, and all the toes except the fourth are fully webbed. Males have nuptial pads on the base of the first finger. Bufo asper is usually dark brown, gray or black in color, with black spotting ventrally. Males have a blackish coloring on their throats (Iskandar 1998 Inger and Stuebing 2005 Inger and Bacon 1968).

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