The body of this species is large and stocky. The canthus is blunt and the tympanum is hidden under the skin. There are 3-5 vomerine teeth. The webbing is very well developed and the tips of the toes and fingers are small discs. The skin of the back has scattered tubercles that have white asperities. The dorsolateral fold is only evident anteriorly, but the supratympanic fold is very prominent. There is also a fang-like projection coming from the tip of the lower jaw; it is larger in the males. There are a pair of vocal sacs and openings on the inner side of the mouth. The nuptial pads in males are not well developed and have semitransparent white asperities. The mean snout to vent length for males is 99 mm (range 79-117), and for females it is 85 mm (range 72-91).
Distribution and Habitat
Country distribution from AmphibiaWeb's database: Japan
L. namiyei is found on Okinawajima Island in Japan. This species inhabits mountainous forests around streams.
Life History, Abundance, Activity, and Special Behaviors
The eggs are 2.2-2.5 mm in diameter and brown. The mating call is 7 sec long and has 50 notes. There are 22 diploid chromosomes in this species. L. namiyei eats small aquatic animals including larval caddisflies, shrimps, and crabs.
Because this species has only 22 chromosomes, there is common ancestry with the Taiwanese population of R. kuhlii.
Maeda, N. and Matsui, M. (1990). Frogs and Toads of Japan, 2nd edition. Bun-Ichi Sogo Shuppan Co., Ltd., Tokyo, Japan.
Written by Ambika Sopory (shambika AT hotmail.com), UC Berkeley
First submitted 2001-11-09
Edited by Vance Vredenburg (2001-12-18)
Citation: AmphibiaWeb: Information on
amphibian biology and conservation. [web application]. 2013. Berkeley, California:
(Accessed: May 19, 2013).
AmphibiaWeb's policy on data use.