Hynobius sumidai Sugawara, Naito, Iwata, and Nagano, 2022

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

Hynobius sumidai Sugawara, Naito, Iwata, and Nagano, 2022, Bull. Kanagawa Prefect. Mus. (Nat. Sci.), 51: 42. Holotype: HMNHAM-102, by original designation. Type locality: "from Tamaricho, Takehara-shi, Hiroshima Prefecture, Chugoku, Japan [34° 24′ N, 132° 47′ E; elevation = 340 m above sea level (a.s.l.); in all cases, datum = WGS84". ZooBank publication registration:1A57B58F-613F-45E5-8AB8-52D90A1DBB53

English Names

Sumida's Salamander (Raffaëlli, 2022, Salamanders & Newts of the World: 121).


Endemic to Hiroshima Prefecture in Higashihiroshima-shi (former Saijo-cho, Kurose-cho, Fukutomi-cho, Toyosaka-cho, Akitsu-cho, and Happonmatsu-cho), Takehara-shi, and Kure-shi, western Honshu, Japan. 160 to 455 m elevation. 

Geographic Occurrence

Natural Resident: Japan

Endemic: Japan


Formerly confused with Hynobius akiensis according to the original publication, where morphometric and mtDNA markers were detailed. Raffaëlli, 2022, Salamanders & Newts of the World: 121, provided an account, summarizing systematics, life history, population status, and distribution (including a polygon map). Tomimori, Matsui, Okawa, Nishikawa, Tanabe, and Kamasaka, 2023, Zootaxa, 5293: 145–160, provided a molecular and morphological reassessment of the species delimitation as well as an expanded description and species account.  

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