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Description

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The body of this species is slender. The canthus is blunt, and the tympanum is circular. The hindlimb webbing is moderate. The skin on the back is scattered with large warts which contain radiating striae and are surrounded by tubercles. There are 1-7 vomerine teeth. The tips of the fingers and the toes have large discs with circummarginal grooves. There is no dorsolateral fold. The mean snout to vent length for males is 97 mm (range 88-106)and for females it is 110 mm (range 105-117). There are a pair of vocal sacs and openings at the corners of the mouth. The males have nuptial pads that are yellowish brown and poorly developed.

The population from Amamioshima differs morphologically and karotypically from Okinawajima population and could be differentiated at the subspecies level.

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Distribution and Habitat

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This species is found on the islands of Amamaioshima and Okinawajima in Japan. It lives near streams in mountainous forests.

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Life History, Abundance, Activity, and Special Behaviors

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R. ishikawae breeds from January to May in small pools in the cracks of large rocks or underground on the banks of streams. The mating call has one note that lasts for 0.6 seconds. 1,000 creamy eggs with a diameter of 2.9-3.5 mm are laid.

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Ishikawa's frog

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Ishikawa's frog (Odorrana ishikawae) is a species of frog in the family Ranidae. It is endemic to Okinawa Island, one of the Ryukyu Islands of Japan.[1][2] It has been described as the most beautiful frog in Japan.[3][4]

Its natural habitats are temperate forests, rivers, and intermittent rivers. It is threatened by habitat loss.[1]

References

  1. ^ a b c IUCN SSC Amphibian Specialist Group (2015). "Odorrana ishikawae (errata version published in 2017)". IUCN Red List of Threatened Species. 2015: e.T54308994A54315888. doi:10.2305/IUCN.UK.2015-4.RLTS.T54308994A54315888.en.
  2. ^ a b Frost, Darrel R. (2019). "Odorrana ishikawae (Stejneger, 1901)". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. Retrieved 30 April 2019.
  3. ^ Igawa, Takeshi; et al. (2011). "Isolation and characterization of twelve microsatellite loci of endangered Ishikawa's frog (Odorrana ishikawae)". Conservation Genetics Resources. 3 (3): 421–424. doi:10.1007/s12686-010-9370-7.
  4. ^ Sumida, Masayuki; et al. (2011). "Artificial production and natural breeding of the endangered frog species Odorrana ishikawae, with special reference to fauna conservation in the laboratory". Zoological Science. 28 (11): 834–839. doi:10.2108/zsj.28.834. PMID 22035306.

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Ishikawa's frog: Brief Summary

provided by wikipedia EN

Ishikawa's frog (Odorrana ishikawae) is a species of frog in the family Ranidae. It is endemic to Okinawa Island, one of the Ryukyu Islands of Japan. It has been described as the most beautiful frog in Japan.

Its natural habitats are temperate forests, rivers, and intermittent rivers. It is threatened by habitat loss.

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