Hyla arborea var. japonica Günther, 1859 "1858", Cat. Batr. Sal. Coll. Brit. Mus.: 109. Syntypes: BMNH 44.2.22.107 (3 specimens), according to Duellman, 1977, Das Tierreich, 95: 32. Type locality: "Japan".
Hyla japonica — Camerano, 1879, Atti Accad. Sci. Torino, Cl. Sci. Fis. Mat. Nat., 14: 895.
Hyla arborea var. japonica — Boettger, 1885, Ber. Offenbach. Ver. Naturkd., 24-25: 164.
Hyla stepheni Boulenger, 1888 "1887", Proc. Zool. Soc. London, 1887: 579. Holotype: BMNH 1947.2.30.99 (formerly 89.11.8.5) according to Condit, 1964, J. Ohio Herpetol. Soc., 4: 95. Type locality: "Port Hamilton, Corea [= Korea]". Synonymy with Hyla japonica by Pope and Boring, 1940, Peking Nat. Hist. Bull., 15: 35. Synonymy with Hyla ussuriensis by Yang, 1962, Korean J. Zool., 5: 35-38. Possibly a senior synonym of Hyla suweonensis according to Kuramoto, 1980, Copeia, 1980: 104-105. Yang, Kim, Min, and Suh, 2001, Monogr. Korean Amph.: 43, placed this back into the synonymy of Hyla japonica (sensu lato).
Hyla arborea japonica — Nikolskii, 1918, Fauna Rossii, Zemnovodnye: 145. Pope, 1931, Bull. Am. Mus. Nat. Hist., 61: 462.
Hyla arborea ussuriensis Nikolskii, 1918, Fauna Rossii, Zemnovodnye: 148. Holotype: Not stated; MNKNU 26332 according to Vedmederya, Zinenko, and Barabanov, 2009, Russ. J. Herpetol., 16: 204. Type locality: Environs of the village of Chernigovka in the Maritime Territory [Russia]. Given as "Chernigovka railway station, Primorskaya oblast", Russia by Vedmederya, Zinenko, and Barabanov, 2009, Russ. J. Herpetol., 16: 204. Synonymy with Hyla stepheni by Yang, 1962, Korean J. Zool., 5: 35-38.
Hyla arborea stepheni — Okada, 1928, Chosen Nat. Hist. Soc. J., 6: 24. Okada, 1931, Tailless Batr. Japan. Empire: 63; Yang, 1962, Korean J. Zool., 5: 35.
Hyla sodei-campi Kostin, 1935, Annot. Zool. Japon., 15: 28. Holotype: MNMH, according to Duellman, 1977, Das Tierreich, 95: 32. Type locality: "Mankou of the Western line of North Manchurian Railway (Chinese Eastern Rly.) in Soda Steppe, N. Manchuria", China. See also discussion of type locality of Salamandrella keyserlingii var. sodei-campi.
Hyla ussuriensis — Fei, 1999, Atlas Amph. China: 142-143.
Hyla japonica stepheni — Kuzmin and Semenov, 2006, Cat. Amph. Rept. Russia: 26.
Hyla japonica japonica — Kuzmin and Semenov, 2006, Cat. Amph. Rept. Russia: 26. By implication.
Far Eastern Treefrog (Borkin and Kuzmin, 1988, in Vorobyeva and Darevsky (eds.), Amph. Rept. Mongolian P. Rep.: 248).
Japanese Tree Toad (Ananjeva, Borkin, Darevsky, and Orlov, 1988, Dict. Amph. Rept. Five Languages: 58).
Japanese Treefrog (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 56; Kuzmin, 1999, Amph. Former Soviet Union: 291).
Japanese Treefrog (Goris and Maeda, 2004, Guide Amph. Rept. Japan: 58).
Northeast China Tree Toad (Hyla ussuriensis [no longer recognized]: Fei, 1999, Atlas Amph. China: 142).
Japan and nearby islands, Korea, extreme northeastern Mongolia, east-central (south to Guizhou) and northeastern China (Heilongjing, Jiling, Liaoning, and Nei Mongol), and Far Eastern Russia from Lake Baikal through the Amur and Ussuri river basins southeast to the coast, southern Sakhalin I. and Kunashir I.
In the Hyla eximia group of Faivovich, Haddad, Garcia, Frost, Campbell, and Wheeler, 2005, Bull. Am. Mus. Nat. Hist., 294: 102. Kuramoto, 1980, Copeia, 1980: 106, distinguished this species from Hyla suweonensis, and transferred this species into the Hyla eximia group. See Kuramoto, 1984, Copeia, 1984: 609-616, and Nishioka, Sumida, and Borkin, 1990, Sci. Rep. Lab. Amph. Biol. Hiroshima Univ., 10: 93-124, for additional evidence of distinctiveness from other Eurasian Hyla. Maeda and Matsui, 1990, Frogs Toads Japan, Ed. 2: 36-39, provided an acount for Japan. Matsui, 2000, Comp. Biochem. Physiol. B—Comp. Biochem., 126: 247-256, suggested that Hyla japonica is a species complex. Goris and Maeda, 2004, Guide Amph. Rept. Japan: 58-60, provided an account, map, and photograph. See account by Kuzmin, 1999, Amph. Former Soviet Union: 291-296, who considered Hyla stepheni and Hyla ussuriensis to be synonyms of Hyla japonica. Zhang, 2002, Sichuan J. Zool., 21: 198-199, provided a key to differentiate this species from others in China. Yang, Kim, Min, and Suh, 2001, Monogr. Korean Amph.: 54-55, provided a brief account, map and figure for South Korea. Fei, 1999, Atlas Amph. China: 142-143, removed Hyla ussuriensis from the synonymy of Hyla japonica where it had been placed by Pope and Boring, 1940, Peking Nat. Hist. Bull., 15: 35, and where it was replaced by Kuzmin and Maslova, 2003, Adv. Amph. Res. Former Soviet Union, 8: 179-181, who discussed the controversy of how many species existed of treefrogs in China, Russia, and Japan, who noted that further research might support the view that one species occurs in Japan (Hyla japonica), another in northern China and Far Eastern Russia (Hyla stepheni), and another in central and eastern China (Hyla immaculata)—the position of Fei, Ye, Huang, Jiang, and Xie, 2005, Illust. Key Chinese Amph.: 99. Although it is likely that more than one species exists under this name, the systematics are obfuscated by national treatments without reference to the entire range. A complete revision needs to be completed, taking into account all populations and type localities, employing both molecular and morphologica evidence (DRF). Hyla suweonensis may be a synonym of Hyla stepheni (= Hyla ussuriensis) by implication of statements by Kuramoto, 1980, Copeia, 1980: 104-105. In the Hyla immaculata group of Fei, Ye, Huang, Jiang, and Xie, 2005, Illust. Key Chinese Amph.: 99, who distinguished Hyla ussuriensis from Hyla immaculata, Hyla japonica, and Hyla sanchiangensis. Hyla ussuriensis was removed from the synonymy of Hyla japonica by Fei, 1999, Atlas Amph. China: 142-143, where it had been placed by Pope and Boring, 1940, Peking Nat. Hist. Bull., 15: 35, and Kuzmin and Maslova, 2003, Adv. Amph. Res. Former Soviet Union, 8: 177. Fei, Ye, and Jiang, 2010, Colored Atlas of Chinese Amph.: 258, provided a brief account including photographs.
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