Description
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).

Distribution and Habitat

Country distribution from AmphibiaWeb's database: Malaysia

Malaysian region distribution from AmphibiaWeb's database: Peninsular Malaysia

	View distribution map in BerkeleyMapper.
	View Bd and Bsal data (13 records).

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).

Life History, Abundance, Activity, and Special Behaviors
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).

Comments
Produces very high frequency whistles (Sukumaran 2002).

References

Boulenger, G. A. (1912). A Vertebrate Fauna of the Malay Peninsula from the Isthmus of Kra to Singapore including Adjacent Islands: Reptilia and Batrachia. Taylor and Francis, London.

Dring, J. C. M. (1979). ''Amphibians and reptiles from northern Trengganu, Malaysia, with descriptions of two new geckos, Cnemaspis and Cyrtodactylus.'' Bulletin of the British Museum (Natural History), 34(5), 181-240.

Smith, M. A. (1930). ''The Reptilia and Amphibia of the Malay Peninsula.'' Bulletin of the Raffles Museum, 3(i-xvii), 1-149.

Sukumaran, J. (2002). ''Frogs of the Malay Peninsula.'' http://frogweb.org/.

Taylor, E.H. (1962). ''The amphibian fauna of Thailand.'' University of Kansas Scientific Bulletin, 43(8), 265-599.

Van Kampen, P. N. (1923). The Amphibia of the Indo-Australian Archipelago. E. J. Brill, Leiden.

Species Account Citation: AmphibiaWeb 2004 Amolops larutensis: Larut Torrent Frog <https://amphibiaweb.org/species/4650> University of California, Berkeley, CA, USA. Accessed Nov 21, 2024.

Citation: AmphibiaWeb. 2024. <https://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 21 Nov 2024.

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