著者

Masafumi MATSUI Yasuchika MISAWA Kanto NISHIKAWA Tomohiko SHIMADA

出版者

日本爬虫両棲類学会

雑誌

Current Herpetology (ISSN:13455834)

巻号頁・発行日

vol.36, no.2, pp.116-126, 2017 (Released:2017-08-25)

参考文献数

27

被引用文献数

9

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A new species of salamander, Hynobius mikawaensis, is described from the eastern part of Aichi Prefecture, central Japan. It is a lentic breeder of the so-called H. lichenatus species group, and is phylogenetically closest to H. nigrescens and H. takedai. Morphologically, it differs greatly from H. nigrescens, but is very similar to H. takedai, from which it could be differentiated by some morphological traits such as shorter forelimbs and hindlimbs, but longer axilla-groin length, all relative to snout-vent length. The new species from the southern Pacific side of central Japan is completely separated geographically from H. nigrescens and H. takedai, both from the northern, Japan Sea side, by the intervening high mountains. This north/south disjunctive distributional pattern is highly unique among Japanese fauna. The range of the species is so small that immediate measure of conservation is necessary.

著者

Masafumi MATSUI Hiroshi OKAWA Kanto NISHIKAWA Gen AOKI Koshiro ETO Natsuhiko YOSHIKAWA Shingo TANABE Yasuchika MISAWA Atsushi TOMINAGA

出版者

The Herpetological Society of Japan

雑誌

Current Herpetology (ISSN:13455834)

巻号頁・発行日

vol.38, no.1, pp.32-90, 2019 (Released:2019-02-28)

参考文献数

81

被引用文献数

23

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The abundant clouded salamander from western Japan, Hynobius nebulosus, has long been considered a single widespread species, although some authors have suggested the inclusion of several cryptic species. This led to a molecular and morphological analysis of populations from all parts of the known range. Phylogenetic relationships were inferred from complete sequences of the mitochondrial cytochrome b gene, and nuclear genome differentiations were estimated by multiplexed inter simple sequence repeat genotyping by sequencing (MIG-seq). The results suggest that H. nebulosus hitherto recognized consists of at least nine species. We applied existing names to two of them, H. nebulosus (Temminck et Schlegel) and H. vandenburghi Dunn, and described seven others as new species.

著者

Atsushi TOMINAGA V. Benno MEYER-ROCHOW Taku OKAMOTO Takeo KURIYAMA Kanto NISHIKAWA Masafumi MATSUI

出版者

The Herpetological Society of Japan

雑誌

Current Herpetology (ISSN:13455834)

巻号頁・発行日

vol.35, no.1, pp.64-68, 2016 (Released:2016-02-26)

参考文献数

17

被引用文献数

2

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Using mitochondrial DNA sequences, we surveyed genetic features of 12 individuals of Cynops pyrrhogaster introduced into Hachijojima Island, in order to estimate their possible origin in the main islands of Japan. The phylogenetic analysis revealed that the 12 examined newts of the introduced population display no genetic diversity and share characteristics with the conspecific population of Shikoku and thus belong to the WESTERN Clade proposed by earlier studies. Our results suggest that the Hachijojima population, having experienced a drastic founder effect, stems from very few individuals from the Shikoku District approximately 650 km to the west.

著者

Dzung Trung LE Tao Thien NGUYEN Kanto NISHIKAWA Son Lan Hung NGUYEN Anh Van PHAM Masafumi MATSUI Marta BERNARDES Truong Quang NGUYEN

出版者

日本爬虫両棲類学会

雑誌

Current Herpetology (ISSN:13455834)

巻号頁・発行日

vol.34, no.1, pp.38-50, 2015 (Released:2015-02-27)

参考文献数

23

被引用文献数

12

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We describe a new species of Tylototriton from northwestern Vietnam and northern Thailand based on morphological and molecular evidence. Tylototriton anguliceps sp. nov. is distinguishable from all the other congeners by the bright to dark orange markings on the head, body, and tail, prominent dorsal and dorsolateral ridges (crests) on the head, skeletal connection between maxillary and pterygoid, and unique mitochondrial and nuclear DNA sequences. Our molecular data show that the new species is nested within the clade comprising T. uyenoi, T. shanjing, T. verrucosus, and T. yangi. The new species is expected to be recorded from other countries in the Indochina region such as southern China, western Myanmar and northern Laos in the future.

著者

Kanto NISHIKAWA Ding-Qi RAO Masafumi MATSUI Koshiro ETO

出版者

日本爬虫両棲類学会

雑誌

Current Herpetology (ISSN:13455834)

巻号頁・発行日

vol.34, no.1, pp.67-74, 2015 (Released:2015-02-27)

参考文献数

24

被引用文献数

5

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We assessed taxonomic relationship of Tylototriton daweishanensis Zhao, Rao, Liu, Li and Yuan, 2012 and T. yangi Hou, Li and Lu, 2012 using mitochondrial DNA sequence data and found them to be as closely related as to be regarded as conspecific. This result, together with available morphological information, strongly indicates that T. daweishanensis is a junior synonym of T. yangi.

著者

Natsuhiko YOSHIKAWA Masafumi MATSUI

出版者

日本爬虫両棲類学会

雑誌

Current Herpetology (ISSN:13455834)

巻号頁・発行日

vol.32, no.1, pp.9-25, 2013 (Released:2013-02-22)

参考文献数

25

被引用文献数

7

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Recent phylogenetic studies using mtDNA and allozymes have revealed the presence of large genetic differentiation within a Japanese clawed salamander, Onychodactylus japonicus, suggesting the presence of several cryptic taxa in this species. Based on morphological analyses, we describe one of them from the Tsukuba Mountains of Ibaraki Prefecture, in the Kanto district of eastern Honshu, as a new species, Onychodactylus tsukubaensis. It is a member of the japonicus species complex of Onychodactylus, and differs from the other species of the complex by a relatively short tail, wide head, and large number of vomerine teeth.