Hynobius yatsui Oyama, 1947

Class: Amphibia > Order: Caudata > Family: Hynobiidae > Subfamily: Hynobiinae > Genus: Hynobius > Species: Hynobius yatsui

Hynobius stejnegeri Dunn, 1923, Proc. California Acad. Sci., Ser. 4, 12: 28. Holotype: USNM 23901, by original designation. Type locality: "Kumamoto, Higo Province, Kyushu [Island]", Japan. See comment. 

Hynobius naevius stejnegeri — Mori, 1928, Chosen Nat. Hist. Soc. J., 6: 2.

Hynobius naevius yatsui Oyama, 1947, Zool. Mag., Tokyo, 57: 106. Syntype(s): Not designated, although Tominaga and Matsui, 2008, Zool. Sci., Tokyo, 25: 111, discussed the syntypes and designated KUM Hy61A as lectotype. Type locality: Aso [region], Kumamoto Prefecture, central Kyushu, Japan. Synonymy by Matsui, Nishikawa, and Tominaga, 2017, Zool. Sci., Tokyo, 34: 538. 

Seudosalamandra stejnegeri — Tago, 1929, Zool. Mag., Tokyo, 41: 431. Incorrect subsequent spelling of the generic name

Pseudosalamandra stejnegeri — Tago, 1931, Imori to Sanshio-uo: 189.

Hynobius stejnegeri — Sato, 1937, Bull. Biogeogr. Soc. Japan, 7: 40.

Hynobius (Hynobius) stejnegeri — Nakamura and Ueno, 1963, Japan. Rept. Amph. Color: 12; Dubois and Raffaëlli, 2012, Alytes, 28: 77-161.

Hynobius naevius yatsui — Tominaga and Matsui, 2008, Zool. Sci., Tokyo, 25: 107.

Hynobius (Makihynobius) stejnegeri —  Fei, Ye, and Jiang, 2012, Colored Atlas Chinese Amph. Distr.: 593. 

Hynobius (Hynobius) yatsui — Dubois and Raffaëlli, 2012, Alytes, 28: 77-161. 

English Names

None noted.


Shikoku, Kyushu, and Honshu I., Japan.


See comment under Hynobius naevius, with which this species was long confused. Tominaga and Matsui, 2007, Zool. Sci., Tokyo, 24: 940–944, noted that this name may apply to a cryptic species but this remains unevaluated (see comment). Tominaga and Matsui, 2008, Zool. Sci., Tokyo, 25: 107–114, provided an extended discussion of this taxon, its type locality, and redescribed the lectotype. Sakamoto, Tominaga, Matsui, Sakata, and Uchino, 2009, Zool. Sci., Tokyo, 26: 35–47, reported on molecular phylogeography on Kyushu. Zheng, Peng, Murphy, Kuro-o, Hu, Hu, and Zeng, 2012, Asian Herpetol. Res., Ser. 2, 3: 288–302, reported on mtDNA evidence for cryptic species diversity. Raffaëlli, 2013, Urodeles du Monde, 2nd ed.: 72, provided a brief account, photo, and map. Matsui, Nishikawa, and Tominaga, 2017, Zool. Sci., Tokyo, 34: 538–545, showed that the holotype of Hynobius stejnegeri, applied to another species (now Hynobius ikioi), was the senior name for this species. This makes for some confusion, but not insurmountable. 

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