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Issue: Vol. 5339 No. 3: 30 Aug. 2023
Type: Article
Published: 2023-08-30
DOI: 10.11646/zootaxa.5339.3.1
Page range: 201-236
Abstract views: 1229
PDF downloaded: 57

Taxonomic reassessment of salamanders (genus Hynobius) from Tsushima Islands, Japan, with a resurrection of Hynobius tagoi Dunn, 1923 (Amphibia: Caudata)

1Graduate School of Human and Environmental Studies; Kyoto University; Yoshida Nihonmatsu; Sakyo-ku; Kyoto 606-8501; JAPAN. Present affiliation: Akita Prefectural Office; Sanno 4-1-1; Akita 010-8570; JAPAN.
Graduate School of Human and Environmental Studies; Kyoto University; Yoshida Nihonmatsu; Sakyo-ku; Kyoto 606-8501; JAPAN. Graduate School of Global Environmental Studies; Kyoto University; Yoshida Honmachi; Sakyo-ku; Kyoto 606-8501; JAPAN.
Graduate School of Human and Environmental Studies; Kyoto University; Yoshida Nihonmatsu; Sakyo-ku; Kyoto 606-8501; JAPAN.
Graduate School of Global Environmental Studies; Kyoto University; Yoshida Honmachi; Sakyo-ku; Kyoto 606-8501; JAPAN.
Faculty of Agriculture and Life Science; Hirosaki University; Bunkyo-cho 3; Hirosaki; Aomori 036-8561; JAPAN.
Amphibia egg-sac Hynobius nebulosus H. tsuensis Kyushu microsatellite neotype nuclear DNA

Abstract

To clarify the taxonomic status of salamanders from Tsushima Islands, Japan, we examined two species of salamanders, Hynobius tsuensis and Hynobius sp. from Tsushima Islands, and compared them with H. nebulosus from Kyushu. We found that the three taxa differ from each other in nuclear DNA, adult morphology, and egg-sac shape, and consider them to be independent species. Based on the investigation of type specimens of the synonyms, we identified Hynobius sp. as H. tagoi Dunn, 1923 and redescribe it herein. Also, we designate a neotype for H. tsuensis and redescribe H. tsuensis. The distribution areas of the two species partly overlap but they were distinguishable by their body colorations: H. tsuensis has uniformly blackish tail sides and a distinct yellow stripe on the upper tail edge; whereas H. tagoi has brown tail sides with numerous dark stippling and without a distinct yellow stripe on the upper tail edge.

 

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