Two new Salamanders of the genus Onychodactylus from Eastern Honshu, Japan (Amphibia, Caudata, Hynobiidae)

Natsuhiko Yoshikawa, Masafumi Matsui

研究成果: Article査読

9 被引用数 (Scopus)

抄録

We describe two new species of hynobiid salamanders in the genus Onychodactylus from eastern Honshu, Japan, based on the morphological and genetic evidence. Onychodactylus intermedius sp. nov. is distributed in southern part of Tohoku Dis- trict and northern Ibaraki and Niigata Prefectures, and was previously reported as S-Tohoku group. Onychodactylus inter- medius belongs to the O. japonicus species complex, and differs from the other congeners in having relatively long tail, narrow head, short snout, 18 presacral vertebrae, and distinctly curved vomerine tooth series without gap. Onychodactylus fuscus sp. nov. is known from only four localities in Fukushima and Niigata Prefectures of Tohoku and Hokuriku Districts. It also belongs to the O. japonicus complex, but lacks the dorsal stripe, which is a diagnostic character of the species com- plex. In other characteristics, O. fuscus differs from the other congeners in having comparatively long tail, wide head and internarial space, shallowly curved vomerine tooth series with gap, and relatively few vomerine teeth. Both species de- scribed here breed in winter. Phylogenetically, the two new species are closely related to each other, forming a well-sup- ported clade with O. tsukubaensis as their sister species. Onychodactylus intermedius sp. nov. is known to be parapatric with O. japonicus and O. nipponoborealis without hybridization, whereas O. fuscus sp. nov. is sympatric with O. japonicus at least in a single known locality, and analysis of microsatellite loci indicates they are reproductively isolated. Copyright

本文言語English
ページ(範囲)53-78
ページ数26
ジャーナルZootaxa
3866
1
DOI
出版ステータスPublished - 2014 9月 22
外部発表はい

ASJC Scopus subject areas

  • 生態、進化、行動および分類学
  • 動物科学および動物学

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