AmphibiaWeb - Amolops cremnobatus


(Translations may not be accurate.)

Amolops cremnobatus Inger & Kottelat, 1998
family: Ranidae
genus: Amolops
Amolops cremnobatus
© 2020 Thanh Luan Nguyen (1 of 6)
Conservation Status (definitions)
IUCN Red List Status Account Least Concern (LC)
National Status None
Regional Status None
conservation needs Access Conservation Needs Assessment Report .


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Members of this genus live in fast flowing streams, to which adults are adapted to through the presence of fairly large discs on their finger/toes and to which tadpoles are adapted for through large sucker-like discs on their bellies by which they attach themselves to rocks. This species is yellowish-brown in life, with a series of short, light bars marking dorsolateral folds, and limbs with black crossbars dorsally. Amolops cremnobatus is a small species (of which males reach 32-34 mm SVL) whose head is wider than body, the snout is short and weakly projecting anteriorly while sloping ventrally. Nasal openings are closer to tip of snout than to eye; eye diameter longer than snout. Tympanum is distinct, but less than half diameter of eye. The presence of vomerine teeth in small oval groupls between choanae (2-4 teeth per clump) is one of the distinguishing characters of this species. Dorsal skin with small white spinose granules. A glandular, interrupted dorsolateral fold is also present (character for the species). Ventral skin is coarsely granular. White conical pustules on reaer of thigh near vent. Another character for this species is the presence of a distinct glandular ridge under the tarsus.

Tadpoles have a large abdominal sucker. Nares are dorsolateral and closer to eyes than to tip of snout. Spiracle is low on side and the tube is free of body wall. The oral disc is as wide as the head body width. This species' tadpole has the highest number of labial tooth rows for the genus (labial tooth row formula is 9-10/6)(Inger and Kottelat 1998).

Distribution and Habitat

Country distribution from AmphibiaWeb's database: Lao People's Democratic Republic, Viet Nam

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View distribution map in BerkeleyMapper.
amphibiandisease logo View Bd and Bsal data (7 records).
Type locality is in Laos, Khammouan Province, Nam Phao River, just downstream from border post on Lak Sao/Vinh Road. The stream was clear and rocky in a disturbed evergreen rain forest. Specimens were collected off the wet rock face of a waterfall.

Life History, Abundance, Activity, and Special Behaviors
Ova unpigmented and deposited in irregular, vertically elongated patches about 5-10 cm long (many parallel to one another) clumbs along the wall of a waterfall. The different clumps were assumed to be different clutches.

Possible reasons for amphibian decline

General habitat alteration and loss
Habitat modification from deforestation, or logging related activities


Inger, R. F., and Kottelat, M. (1998). ''A new species of ranid frog from Laos.'' The Raffles Bulletin of Zoology, 46(1), 29-34..

Originally submitted by: Raul E. Diaz (first posted 2004-06-03)
Edited by: Tate Tunstall (2004-08-12)

Species Account Citation: AmphibiaWeb 2004 Amolops cremnobatus <> University of California, Berkeley, CA, USA. Accessed Jun 22, 2024.

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Citation: AmphibiaWeb. 2024. <> University of California, Berkeley, CA, USA. Accessed 22 Jun 2024.

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