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


Taxonomy of the family Colubridae
Bibliography of the genus Plagiopholis
Biodiversity of the family Colubridae








Genus
Plagiopholis

Blotch-necked Snakes, Asian Mountain Snakes

Halsfleckennattern

Halspletsnoge

1893 Plagiopholis Boulenger (type species: Plagiopholis blakewayi Boulenger 1893)
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

Plagiopholis acuta

Hunan Blotch-necked Snake, Hunan Mountain Snake

Hunan-Halsfleckennatter

Hunan-halspletsnog

2025 Plagiopholis acuta Xu, Ma & Cai in Cai, Xu, Vogel, Peng, Xu, Cheng, Liang, Li, Wang & Ma

Distribution: China (Hunan).





Plagiopholis blakewayi

Burmese Blotch-necked Snake, (Blakeway's Blotch-necked Snake, Blakeway's Mountain Snake)

Burmesische Halsfleckennatter, Blakeways Bergschlange

Burmesisk Halspletsnog

1893 Plagiopholis blakewayi Boulenger
1978 Plagiopholis unipostocularis Zhao, Jiang & Huang (Zhong, Chen, Liu, Zhu, Peng & Guo 2015)
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.


Plagiopholis delacouri

Laotian Blotch-necked Snake, (Delacour's Blotch-necked Snake, Delacour's Mountain Snake)

Laotische Halsfleckennatter

Laotisk Halspletsnog

1929 Plagiopholis delacouri Angel

Distribution: Laos, Vietnam.


Plagiopholis nuchalis

Common Blotch-necked Snake, (Assam Mountain Snake)

Gewöhnliche Halsfleckennatter, (Indische Halsbandnatter)

Almindelig Halspletsnog

1893 Trirhinopholis nuchalis Boulenger
Plagiopholis nuchalis Smith 1940
1913 Oligodon evansi Wall (Smith 1943)

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


Plagiopholis pluvialis

Sichuan Blotch-necked Snake, Western China Mountain Snake

Sichuan-Halsfleckennatter

Sichuan-halspletsnog

2025 Plagiopholis pluvialis Cai, Xu & Ma in Cai, Xu, Vogel, Peng, Xu, Cheng, Liang, Li, Wang & Ma

Distribution: China (Guizhou, Sichuan).





Plagiopholis styani

Fujian Blotch-necked Snake, (Chinese Mountain Snake, Common Mountain Snake)

Fujian-Halsfleckennatter

Fujian-halspletsnog

1899 Trirhinopholis styani Boulenger
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.