Description
Rana sakuraii is relatively robust frog. The mean snout to vent length for males is 45 mm (range 38 - 56 mm), and for females it is 51 mm (range 43 - 60 mm). The canthus is blunt, and the tympanum is circular. There are 4 - 5 vomerine teeth. The webbing is well developed, and the tips of the fingers and toes are slightly dilated. The skin on the back of this frog has small granules. The dorsolateral fold is prominent, and is found protruding outwards above the tympanum. The supratympanic fold is also evident. There is no vocal sac or opening. Breeding males have nuptial pads and skin folds on the flanks and the backs of their thighs (Maeda and Matsui 1990). Males nuptial pads are grayish-yellow or yellow (Maeda and Matsui 1990).

Distribution and Habitat

Country distribution from AmphibiaWeb's database: Japan

	View distribution map in BerkeleyMapper.
	View Bd and Bsal data (1 records).

Rana sakuraii is found specifically between the Kanta and Kinki Districts of Honshu, in Japan. The species inhabits mountainous forests and lives with the litters on the forests floors (Maeda and Matsui 1990).

Life History, Abundance, Activity, and Special Behaviors
This species breeds from February to April in mountainous streams. The eggs are light grayish-brown in color with a diameter of 3.1 - 3.6 mm. The mating calls are uttered under the water, and one call lasts 0.3 sec with 4 notes (Maeda and Matsui 1990).

Rana sakuraii is sometimes sympatric with R. tagoi, but seems completely isolated reproductively by differences in season and site of breeding as well as male calling behavior (Maeda and Matsui 1990).

Comments
There are 5 large and 8 small pairs of chromosomes making 26 in total (Maeda and Matsui 1990).

References

Maeda, N. and Matsui, M. (1990). Frogs and Toads of Japan, 2nd edition. Bun-Ichi Sogo Shuppan Co., Ltd., Tokyo, Japan.

Species Account Citation: AmphibiaWeb 2023 Rana sakuraii: Stream Brown Frog <https://amphibiaweb.org/species/5141> University of California, Berkeley, CA, USA. Accessed Nov 23, 2024.

Citation: AmphibiaWeb. 2024. <https://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 23 Nov 2024.

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