The tadpoles are small, with the tail usually no longer than double the head plus body length, and a denticle formula of I+1-1/III. Papillae are confined to the corner of the mouth, and the mouth is not adapted for stream-dwelling (Iskandar, 1998). Inthara et al. (2005; p. 78) provide a drawing of the larval mouthparts of Bufo parvus compared to eight other tadpole species of Thailand.