中国西部で新種のヘビを発見(New Snake Species Discovered in West China’s Bio-diverse Region)

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2025-10-27 中国科学院(CAS)

中国科学院成都生物研究所と青海大学などの研究チームは、中国西部の四川省エリア(ジャイアントパンダ国家公園内)で新種のヘビを発見し、「西中国マウンテンスネーク(Plagiopholis pluvialis)」と命名した。体長は約80cmで無毒、昼行性でミミズやナメクジを捕食する。首には特徴的な逆V字模様を持つ。本種は、既知種Plagiopholis styaniとの形態・遺伝的比較により独立種と確認され、同属として約1世紀ぶりの新種となる。発見地の「西中国レインゾーン」は年間降水量約2,000mmを誇り、中国で最も生物多様性が高い地域の一つである。研究者らは、この発見が同地域の進化研究と生物多様性保全の科学的価値を裏付けるものであり、ジャイアントパンダ国家公園が果たす生態系保護の役割を強調している。成果は『Zoosystematics and Evolution』誌に掲載。

中国西部で新種のヘビを発見(New Snake Species Discovered in West China’s Bio-diverse Region)
This undated file photo shows a western China mountain snake, a new snake species discovered by Chinese scientists, in southwest China’s Sichuan Province. (Chengdu Institute of Biology of the Chinese Academy of Sciences/Handout via Xinhua)

<関連情報>

Plagiopholis styani(蛇綱、Pseudoxenodontidae )の再記載、中国産2新種の記載 Redescription of Plagiopholis styani (Serpentes, Pseudoxenodontidae), with description of two new species from China

Bo Cai, Yuhao Xu, Gernot Vogel, Lifang Peng, Jinan Xu, Lin Cheng, Dong Liang, Mingxi Li, Yingyong Wang, Shun Ma
Zoosystematics and Evolution  Published: 15 Sep 2025
DOI:https://doi.org/10.3897/zse.101.152739

Abstract

During a long period, the genus Plagiopholis included four species and was extremely scarce. One of the members, Plagiopholis styani Boulenger, 1893, was treated as a single species widely distributed in the Oriental Realm of China. However, after new samplings of this species and examination of historical collection specimens, combined with molecular phylogenetic results based on two mitochondrial gene fragments (CO1 and Cyt b) and morphological comparisons of different populations, we found distinct divergences among them. Based on these results, we made the following taxonomic decisions and described the taxa in detail: (1) the populations from the type locality and adjacent areas such as Zhejiang, Anhui, and northeastern Jiangxi were considered Plagiopholis styani sensu stricto; (2) the population from Hunan Province is herein described as a new species, Plagiopholis acuta sp. nov.; (3) the populations from Sichuan and Guizhou provinces are also described herein as a new species, Plagiopholis pluvialis sp. nov. This study brings the total number of Plagiopholis to six and highlights the importance of documenting the cryptic diversity of small-bodied snakes in East Asia’s fragmented montane ecosystems.

生物環境工学
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