Comprehensive DescriptionRead full entry
A large frog with a variable colouration; males 50-70 mm, females 75-87 mm, maximum length 100 mm. Colouration varies from being almost entirely blackish to yellowish with black spots. Venter yellowish or orange, with or without blackish spots. Iris copper, iris periphery turquoise. Skin on the back smooth in females, granular in males during the breeding season. Iris copper, iris periphery turquoise. Nostrils nearer to eye than to tip of snout. Tympanum distinct, about 1/2 - 2/3 of eye diameter. Tibiotarsal articulation reaches at least the nostrils, sometimes beyond the tip of the snout. Webbing of the hand 1(1), 2i/e(1), 3i(2), 3e(1.5), 4(1); webbing of the foot 1(0), 2i(1), 2e(0), 3i(1), 3e(0), 4i/e (1-1.5), 5 (0.5). Males with nuptial pads and a slightly distensible, single subgular vocal sac.
Similar species: Boophis madagascariensis and B. brachychir have dermal flaps on the elbow and heel; the hands of B. opisthodon are not webbed, B. albilabris is often green with well developed webbing between the fingers.
Taken with permission from Glaw and Vences (2007).