Larut Hill Cascade Frog

Head is long, and broad with short rounded snout. Snout-vent length is typically 20-30 mm in males and 40-54 mm in females. The largest ever reported is 45 mm in males and 75 mm in females (Kampen 1923). Large pustules exist on the dorsal skin. On the dorsal surface is a dark, blotchy, marble pattern with a paleish, yellow-green foundation (nearly white, sometimes pale blue). On the ventral surface, the head and body are white and the limbs range from pale green to grey. Distally, the limbs are very dark with black webbing in between the toes. The fingers are dilated into large discs (Boulenger 1912). Males have external vocal sacs on either side of the throat (Smith 1930). The iris is olive-brown and a gold ring surrounds the pupil (Boulenger 1912). As a tadpole: A. larutensis, like all Amolops, has an abdominal sucker which extends from the lip past the middle of the abdomen (termed gastromyzophorous). Jaws are somewhat serrated and undivided. A. larutensis larvae is about 65 mm in length (Boulenger 1912).Produces very high frequency whistles (Sukumaran 2002).

Malay Peninsula and Peninsular Malaysia. Lives at altitudes up to 1800 m (Taylor 1962). Always found in (and thought to be dependent on) clear, fast moving torrents. Commonly found perched face-down on rocks (Dring 1979).

When disturbed, it will leap into the torrent and return back to its position perched from a rock, seemingly unaffected by the strong torrent. As a tadpole, A. larutensis uses its abdominal sucker to cling onto rocks amidst extremely strong current. There, it will graze on algae growing on the rock (Dring 1979).

Amolops larutensis (common names: Larut sucker frog, Larut Hill cascade frog, southern pad-discked frog) is a species of frog in the family Ranidae that is found in the Malay Peninsula from southernmost Thailand to Malaysia; records further north probably represent A. panhai.