Citation: Midtgaard, Rune. RepFocus - A Survey of the Reptiles of the World. (www.repfocus.dk). Latest update:
November 6th, 2025.




 



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Genus
Plagiopholis

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Blotch-necked Snakes, Asian Mountain Snakes
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Halsfleckennattern
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Halspletsnoge
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1893 |  |
Plagiopholis Boulenger (type species: Plagiopholis blakewayi Boulenger 1893) |
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1893 |  |
Trirhinopholis Boulenger (type species: Trirhinopholis nuchalis Boulenger 1893; syn. Williams & Wallach 1989) |
Contents:
6 species, 2 of which (33.3%) are endemic.
Endemism: 0% 100%
Distribution:
SE. Asia.
Reported from:
China
(Anhui,
Chongqing,
Fujian,
Gansu,
Guangdong,
Guangxi,
Guizhou,
Hubei,
Hunan,
Jiangxi,
Sichuan,
Yunnan,
Zhejiang),
Laos,
Myanmar,
Thailand,
Vietnam.
|

Meristic and other data of the world's snakes. Compiled by
V. Wallach
Key to abbreviations

Head drawings of the genus Plagiopholis. Compiled by V. Wallach
|

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Plagiopholis acuta

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Hunan Blotch-necked Snake, Hunan Mountain Snake
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Hunan-Halsfleckennatter
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Hunan-halspletsnog
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2025 |  |
Plagiopholis acuta Xu, Ma & Cai in Cai, Xu, Vogel, Peng, Xu, Cheng, Liang, Li, Wang & Ma |

Distribution:
China
(Hunan).
|

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Plagiopholis blakewayi

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Burmese Blotch-necked Snake, (Blakeway's Blotch-necked Snake, Blakeway's Mountain Snake)
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Burmesische Halsfleckennatter, Blakeways Bergschlange
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Burmesisk Halspletsnog
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1893 |  |
Plagiopholis blakewayi Boulenger |
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1978 |  |
Plagiopholis unipostocularis Zhao, Jiang & Huang (Zhong, Chen, Liu, Zhu, Peng & Guo 2015) |
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1993 |  |
Oligodon kunmingensis Kou & Wu (Kucharzewski 2009) |

Remarks:
Wallach, Williams & Boundy (2014) listed kunmingensis as a valid species of the genus
Oligodon, but without discussion.
Distribution:
China
(Guizhou,
Sichuan,
Yunnan),
Myanmar,
Thailand.
|

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Plagiopholis delacouri

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Laotian Blotch-necked Snake, (Delacour's Blotch-necked Snake, Delacour's Mountain Snake)
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Laotische Halsfleckennatter
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Laotisk Halspletsnog
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1929 |  |
Plagiopholis delacouri Angel |

Distribution:
Laos,
Vietnam.
|

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Plagiopholis nuchalis

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Common Blotch-necked Snake, (Assam Mountain Snake)
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Gewöhnliche Halsfleckennatter, (Indische Halsbandnatter)
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Almindelig Halspletsnog
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1893 |  |
Trirhinopholis nuchalis Boulenger |
|
|  |
Plagiopholis nuchalis Smith 1940 |
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1913 |  |
Oligodon evansi Wall (Smith 1943) |

Remarks:
Presence in Vietnam and India needs confirmation (Tillack, Scheidt & Ihle 2006).
Distribution:
China
(Yunnan),
Laos,
Myanmar,
Thailand.
|

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Plagiopholis pluvialis

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Sichuan Blotch-necked Snake, Western China Mountain Snake
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Sichuan-Halsfleckennatter
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Sichuan-halspletsnog
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2025 |  |
Plagiopholis pluvialis Cai, Xu & Ma in Cai, Xu, Vogel, Peng, Xu, Cheng, Liang, Li, Wang & Ma |

Distribution:
China
(Guizhou,
Sichuan).
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Plagiopholis styani

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Fujian Blotch-necked Snake, (Chinese Mountain Snake, Common Mountain Snake)
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Fujian-Halsfleckennatter
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Fujian-halspletsnog
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1899 |  |
Trirhinopholis styani Boulenger |
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Plagiopholis styani Ding & Zheng 1974 |

Remarks:
Previously included the populations now assigned to acuta and pluvialis (Cai, Xu, Vogel, Peng, Xu, Cheng, Liang, Li, Wang & Ma 2025).
Presence confirmed with molecular data only for Fujian, Jiangxi, and Zhejiang.
Records from other provinces need verification, but are provisionally retained herein as styani, pending further studies.
Distribution:
China
(Anhui,
Chongqing,
Fujian,
Gansu,
Guangdong,
Guangxi,
Hubei,
Hunan,
Jiangxi,
Zhejiang),
Vietnam.
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