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Description ( İngilizce )

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Hynobius katoi has a uniformly dark brown dorsum in life, very occasionally scattered with silvery dots. The dorsal silvery dots are seen more frequently in juveniles than in adults. The underside is lighter than the dorsum, with silvery dots also on the throat and sometimes on the belly. In preservative, the dorsal color tends to fade to gray brown. The head is moderately depressed, distinctly longer than broad. There are usually 13 costal grooves (including the axillary groove), but sometimes only 12. Limbs are short and stout. When the fore- and hindlimbs are adpressed there is almost always a space of at least 1 fold between the toes. The degree of separation is greater in females (median= 2.5 folds) than in males (median=0.75 fold). The fifth toe is very short, rudimentary, or even absent. The tail is rounded at the base and gradually flattens to the tip, becoming obtusely pointed at the tip. The tail is only slightly keeled. The upper keel very weakly originates at the posterior two-fifth and the lower keel at the posterior one-fifth. There is no development of a tail fin even in breeding males. Vomerine teeth are in two small, obliquely arched series which nearly touch at midline, usually forming a shallow "U." The combined series is wider than long. Male SVL is 58 mm and female SVL is 63 mm. H. katoi is most similar to H. naevius in general body proportion, but with a nearly immaculate dorsum, relatively narrower head, shorter trunk, fewer vomerine teeth, and a much more shallowly curved vomerine teeth series. H. katoi is completely different from sympatric H. kimurae in having a much smaller, nearly immaculate body, longer head, shorter trunk, fewer vomerine teeth, and a much shallower vomerine teeth series.The specific name "katoi" is dedicated to Prof. Makoto Kato of Kyoto University who first collected this species as an undergraduate.
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Nichole Winters

Distribution and Habitat ( İngilizce )

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H. katoi is known so far only from south Central Japan. It is found in the montane region of the northwestern part of Shizuoka Prefecture and southeastern part of Nagano Prefecture, on the Akaishi Mountains and along Oi-gawa and Tenryu-gawa rivers. The 21 known localities range from 500 meters to 1200 meters in altitude (median=750 meters).
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Life History, Abundance, Activity, and Special Behaviors ( İngilizce )

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Hynobius katoi belongs to the family Hynobiidae, which is one of only two salamander families exhibiting external fertilization of eggs. However, the natural history of H. katoi is poorly understood, and egg sacs or larvae have yet to be found in nature despite extensive field surveys. It is thought that breeding occurs in flowing water underground. Ovaries were examined from two collected females with 9 and 13 eggs respectively. The mean diameter of ova found in the ovaries from these two females were 4.8 and 5.0 mm. Both the animal and the vegetal poles of eggs were cream-colored. Because females with ripe eggs were collected from late April to early May, it is thought that breeding occurs in spring. The smallest young, collected in late August, is considered to have just metamorphosed. In some larvae metamorphosis seems to occur in the year of oviposition.
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Hynobius katoi ( İngilizce )

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Hynobius katoi is a species of salamander in the family Hynobiidae, endemic to Japan. Its natural habitats are temperate forests and rivers.

References

  1. ^ IUCN SSC Amphibian Specialist Group (2021). "Hynobius katoi". IUCN Red List of Threatened Species. 2021: e.T61895A177183636. doi:10.2305/IUCN.UK.2021-1.RLTS.T61895A177183636.en. Retrieved 16 November 2021.
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Hynobius katoi: Brief Summary ( İngilizce )

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Hynobius katoi is a species of salamander in the family Hynobiidae, endemic to Japan. Its natural habitats are temperate forests and rivers.

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Hynobius katoi ( İspanyolca; Kastilyaca )

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La salamandra de Kato (Hynobius katoi), es una especie de anfibio caudado de la familia Hynobiidae. Es endémica del Japón. Su hábitat natural son los bosques templados y los ríos y marismas.

Referencias

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Hynobius katoi: Brief Summary ( İspanyolca; Kastilyaca )

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La salamandra de Kato (Hynobius katoi), es una especie de anfibio caudado de la familia Hynobiidae. Es endémica del Japón. Su hábitat natural son los bosques templados y los ríos y marismas.

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Hynobius katoi ( Baskça )

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Hynobius katoi Hynobius generoko animalia da. Anfibioen barruko Hynobiidae familian sailkatuta dago, Caudata ordenan.

Erreferentziak

Ikus, gainera

Kanpo estekak

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Hynobius katoi: Brief Summary ( Baskça )

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Hynobius katoi Hynobius generoko animalia da. Anfibioen barruko Hynobiidae familian sailkatuta dago, Caudata ordenan.

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Hynobius katoi ( Fransızca )

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Hynobius katoi est une espèce d'urodèles de la famille des Hynobiidae[1].

Répartition

Cette espèce est endémique de Honshū au Japon. Elle se rencontre dans les préfectures de Shizuoka et de Nagano de 500 à 1 200 m d'altitude[1].

Description

Les mâles mesurent jusqu'à 58 mm sans la queue et les femelles jusqu'à 63 mm sans la queue[2].

Étymologie

Cette espèce est nommée en l'honneur de Makoto Kato.

Publication originale

  • Matsui, Kokuryo, Misawa & Nishikawa, 2004 : A new species of salamander of the genus Hynobius from central Honshu, Japan (Amphibia, Urodela). Zoological Science. Tokyo, vol. 21, p. 661-669 (texte intégral).

Notes et références

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Hynobius katoi: Brief Summary ( Fransızca )

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Hynobius katoi est une espèce d'urodèles de la famille des Hynobiidae.

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Hynobius katoi ( Portekizce )

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Hynobius katoi é uma espécie de anfíbio caudado pertencente à família Hynobiidae. Endêmica do Japão.

Referências

  • Stuart, S. N. 2006. Hynobius katoi. In: IUCN 2007. 2007 IUCN Red List of Threatened Species. . Acessado em 7 de setembro de 2008.
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Hynobius katoi: Brief Summary ( Portekizce )

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Hynobius katoi é uma espécie de anfíbio caudado pertencente à família Hynobiidae. Endêmica do Japão.

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Hynobius katoi ( Vietnamca )

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Hynobius katoi là một loài kỳ giông thuộc họ Hynobiidae. Đây là loài đặc hữu của Nhật Bản. Môi trường sống tự nhiên của chúng là rừng ôn đới và sông ngòi.

Tham khảo


Hình tượng sơ khai Bài viết Bộ Có đuôi này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn.
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Hynobius katoi: Brief Summary ( Vietnamca )

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Hynobius katoi là một loài kỳ giông thuộc họ Hynobiidae. Đây là loài đặc hữu của Nhật Bản. Môi trường sống tự nhiên của chúng là rừng ôn đới và sông ngòi.

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アカイシサンショウウオ ( Japonca )

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アカイシサンショウウオ 保全状況評価[1] DATA DEFICIENT
(IUCN Red List Ver.3.1 (2001))
Status none DD.svg 分類 : 動物界 Animalia : 脊索動物門 Chordata 亜門 : 脊椎動物亜門 Vertebrata : 両生綱 Amphibia : 有尾目 Caudata/Urodela : サンショウウオ科 Hynobiidae : サンショウウオ属 Hynobius : アカイシサンショウウオ
H. katoi 学名 Hynobius katoi
Matsui, Kokuryo, Misawa et Nishikawa, 2004[2][3] 和名 アカイシサンショウウオ[3] 英名 Akaishi salamander[3]

アカイシサンショウウオ(Hynobius katoi)は、両生綱有尾目サンショウウオ科サンショウウオ属に分類される有尾類。

分布[編集]

日本(静岡県北西部<静岡市島田市旧川根町、浜松市旧水窪町、藤枝市>・長野県南東部<飯田市旧南信濃村>の赤石山脈[2]

模式標本の産地(模式産地)は高根山(藤枝市)[2]。多くの分布域はヒダサンショウウオと重複する[3]

形態[編集]

全長9.2 - 11.7センチメートル[3]。背面は紫褐色で、銀白色の斑点が入る個体もいる[3]。腹面は淡褐色で喉に斑紋が入る[3]。腹面に斑紋はほとんど入らないとされるが、2014年に静岡市興津川流域で採集された個体は腹面に銀白色の斑点が密に入っていた例もある[4]。尾は円筒形だが、先端は側扁する[3]

鋤骨歯列は浅いアルファベットの「U」字状[2][3][4]。後肢の趾は4 - 5本で、第5趾は短いか第5趾がない個体もいる[3]

分類[編集]

1978年に静岡県で加藤真によってヒダサンショウウオと共に採集されたが[2]、鋤骨歯列は西日本に分布するブチサンショウウオに類似していたものの斑紋はヒダサンショウウオ・ブチサンショウウオのいずれとも異なっていた[5]。国領康弘・見澤康充両名の調査により後に複数の個体が採集された[5]。形態が明らかに異なることや複数のサンプルが揃ったことで酵素蛋白の電気泳動解析が行われ、その解析結果から2004年に新種として記載された[5]。種小名katoiは、本種を初めて採集した加藤真への献名[2]

生態[編集]

標高500 - 1,200メートルにある針広混交林内を流れる小渓流の周辺にある礫が多い斜面でのみ発見されている[3]。それ以前から知られてはいたが、ヒダサンショウウオの無斑形と見なされていた。生息地では、ヒダサンショウウオもほぼ同所的に生息しており、他にハコネサンショウウオも生息する。

野生下での卵や幼生の発見例はないが、渓流の源流周辺にある伏流水の中で産卵すると考えられている[3]。抱卵メスの発見例から4 - 5月に産卵すると考えられている。9 - 13個の大型の卵を抱卵していた例がある[3]

人間との関係[編集]

山地森林に生息するため生息環境は比較的安定しているが、分布が限定的であること、生息地での道路建設・森林伐採・河川改修による影響、およびそれらによる水質汚濁・地下水流の変化、ペット用の乱獲などが懸念されている[3]。2009年現在静岡県では絶滅危惧IB類、長野県では絶滅危惧IA類に掲載されている[6]。2014年現在では長野県で指定希少野生動植物種に指定されている[3]

絶滅危惧IB類 (EN)環境省レッドリスト[3]

Status jenv EN.svg

出典[編集]

[ヘルプ]
  1. ^ Simon Stuart. 2006. Hynobius katoi. The IUCN Red List of Threatened Species 2006: e.T61895A12563919. http://dx.doi.org/10.2305/IUCN.UK.2006.RLTS.T61895A12563919.en. Downloaded on 31 March 2018.
  2. ^ a b c d e f Masahumi Matsui, Yasuhiro Kokuryo, Yasuchika Misawa et Kanto Nishikawa, "A New Species of Salamander of the Genus Hynobius from Central Honshu, Japan (Amphibia, Urodela)," Zoological Science, Volume 21, Issue 6, Zoological Society of Japan, Tokyo, 2004, Pages 661-669.
  3. ^ a b c d e f g h i j k l m n o p 松井正文 「アカイシサンショウウオ」『レッドデータブック2014 -日本の絶滅のおそれのある野生動物-3 爬虫類・両生類』環境省自然環境局野生生物課希少種保全推進室編、株式会社ぎょうせい2014年、98-99頁。
  4. ^ a b 佐々木彰央 「静岡市興津川流域から得られたアカイシサンショウウオ」『東海自然誌』第8号、静岡県自然史博物館ネットワーク、2015年、23-25頁。
  5. ^ a b c 松井正文 「アカイシサンショウウオの発見と新種記載について」『ハ・ペ・トロジー』第2号、誠文堂新光社2004年、110頁。
  6. ^ 北野聡・四方圭一郎 「飯田市遠山川流域におけるアカイシサンショウウオの記録」『長野県環境保全研究所報告』第5号、長野県環境保全研究所、2009年、113-115頁。
  • 川上洋一著『絶滅危惧種の動物事典』、東京堂出版、2008年

関連項目[編集]

 src= ウィキスピーシーズにアカイシサンショウウオに関する情報があります。 執筆の途中です この項目は、動物に関連した書きかけの項目です。この項目を加筆・訂正などしてくださる協力者を求めていますPortal:生き物と自然プロジェクト:生物)。
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アカイシサンショウウオ: Brief Summary ( Japonca )

wikipedia 日本語 tarafından sağlandı

アカイシサンショウウオ(Hynobius katoi)は、両生綱有尾目サンショウウオ科サンショウウオ属に分類される有尾類。

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