description Japanese Wrinkled Frog Overview
Glandirana rugosa is a frog species native to Japan and parts of East Asia, also introduced to Hawaii, characterized by its rough, warty dorsal skin that gives it its common name. Formerly classified within the genus Rana, it was reclassified into Glandirana following molecular phylogenetic studies distinguishing it from true ranid frogs. The species is closely associated with aquatic habitats such as rice paddies, streams, and ponds, and has been extensively studied in reproductive biology and sex-determination research.
help Japanese Wrinkled Frog FAQ
What is the scientific name of the Japanese wrinkled frog?
Its current scientific name is Glandirana rugosa, although older sources used Rana rugosa. It is a true frog in the family Ranidae. [Amphibian Species of the World](https://amphibiansoftheworld.amnh.org/Amphibia/Anura/Ranidae/Glandirana/Glandirana-rugosa)
Where is Glandirana rugosa native?
It is native to Japan, including Honshu, Shikoku, and Kyushu. The species was also introduced and became established in Hawaii.
Why is it called the Japanese wrinkled frog?
Its back has rough, warty skin that feels uneven rather than smooth. It lives around freshwater places such as rice fields, ponds, streams, and wetlands.
Why do researchers study the Japanese wrinkled frog?
Japanese populations are scientifically interesting because different regions can show both XX and XY sex-determination systems and ZZ and ZW systems. That makes Glandirana rugosa useful for studying how sex chromosomes evolve.
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