著者

Kento Takata Yanpeng Shen Kanto Nishikawa Masaharu Motokawa

出版者

The Japanese Society of Systematic Zoology

雑誌

Species Diversity (ISSN:13421670)

巻号頁・発行日

vol.28, no.1, pp.1-4, 2023-01-01 (Released:2023-01-01)

参考文献数

20

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A specimen of Acrochordidae, Acrochordus granulatus (Schneider, 1799) (Squamata), which was collected on Amamioshima Island, Ryukyu Archipelago, Japan in 1938, was discovered in the historical zoological collection of the Kyoto University, Japan. The specimen was originally included in the “Third Higher School collection” and is now kept in the Kyoto University Museum. The specimen represents the first record of this species from Japan. Morphology of the specimen is described, and the migration route of this individual is briefly discussed.

著者

Kotaro OZAKI Kanto NISHIKAWA

出版者

The Herpetological Society of Japan

雑誌

Current Herpetology (ISSN:13455834)

巻号頁・発行日

vol.42, no.2, pp.162-170, 2023 (Released:2023-08-30)

参考文献数

18

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The Japanese fire-belly newt, Cynops pyrrhogaster, is a near threatened species that is conservation dependent. Here, we examine feeding habits across the year within a genetically divergent intraspecific lineages of this species (the Central Lineage) to provide information to support future in-situ and ex-situ conservation activities. Stomach contents from newts were collected in a paddy field habitat, Kyoto City, central Honshu, Japan for two consecutive years. Throughout the year, dipteran aquatic larvae were the most important food source both for males and females, although terrestrial invertebrates were also important prey for the newts. During periods of low prey availability shed skin could also be a relatively valuable source of food. Sympatric frogs and newts appear to target different prey and this may facilitate their co-existence. Our study provides new information on suitable prey items for the Central Lineage of C. pyrrhogaster both in its natural habitat and in captivity.

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

Tomoya Suzuki Kanto Nishikawa Yukuto Sato Mamoru Toda

出版者

The Genetics Society of Japan

雑誌

Genes & Genetic Systems (ISSN:13417568)

巻号頁・発行日

pp.21-00046, (Released:2021-11-07)

参考文献数

25

被引用文献数

1

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Species identification using molecular techniques has recently become common for various taxa. Loop-mediated isothermal amplification (LAMP) is one of the easiest and least expensive molecular identification methods. Although few studies have developed LAMP assays for amphibians, we believe that LAMP is also useful for identifying endangered amphibians. Hynobius tokyoensis and H. lichenatus occur in Honshu, Japan, and have parapatric distributions. They are similar morphologically, especially at early developmental stages, including eggs and larvae. Hynobius tokyoensis has been listed as a national endangered species in Japan since 2020, and unambiguous identification of these species is therefore important for their conservation and management. In this study, we developed a LAMP primer set for the mitochondrial cytochrome b region to detect H. tokyoensis, and we evaluated the LAMP assay using total genomic DNA from four H. tokyoensis and three H. lichenatus individuals from across most of their ranges. Our LAMP primer set could distinguish these two species. This study should help to establish LAMP assays for other endangered species and morphologically similar species.

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.