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Plagiopholis blakewayi BOULENGER, 1893

IUCN Red List - Plagiopholis blakewayi - Least Concern, LC
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Higher TaxaColubridae (Pseudoxenodontinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Blakeway’s Mountain Snake
G: Blakeways Bergschlange
Chinese: 颈斑蛇 
SynonymPlagiopholis blakewayi BOULENGER 1893: 301
Plagiopholis blakewayi — WALL 1923: 467
Plagiopholis blakewayi — SMITH 1943: 325
Oligodon kunmingensis KOU & WU 1993
Plagiopholis unipostocularis ZHAO, JIANG, HUANG 1978
Plagiopholis unipostocularis — GUO et al. 1999
Plagiopholis blakewayi — TILLACK et al. 2006
Plagiopholis unipostocularis — ZHAO 2006
Plagiopholis unipostocularis — WALLACH et al. 2014: 563
Oligodon kunmingensis — WALLACH et al. 2014: 489
Plagiopholis blakewayi — WALLACH et al. 2014: 562 
DistributionMyanmar (= Burma: Kachin, Shan), NW Thailand (Chiang Mai), SW China (Guizhou, Yunnan, Sichuan), elevations above 1300 m

kunmingensis: China (Yunnan); Type locality: Western Hill of Kunming City (25° 0’ N, 102° 7’ E), Yunnan.

unipostocularis: China (Yunnan); Type locality: Yunnan Prov.  
Reproductionoviparous 
TypesHolotype: BMNH 1946.1.12.35 (was 91.11.26.30), Male.
Holotype: CIB 505121, female [unipostocularis] 
DiagnosisDiagnosis: (1) two (seldom one) postoculars, (2) two temporals (seldom one), (3) the fourth supralabial touch parietal when temporal is one, and the fourth supralabial does not touch parietal when temporals are two; (4) ventrals 107–136, subcaudals 17–28 pairs (Zhong et al. 2015).

Plagiopholis blakewayi is clearly distinguishable from P. nuchalis by the absence of a loreal shield, the lower number of posterior temporals (0 or 1 vs. 2 in P. nuchalis), and a lower number of supralabials (5 vs. 6 in P. nuchalis). Other points of distinction include that in P. blakewayi only the 3rd supralabial touches the eye and the 4th is the largest one, whereas in P. nuchalis the 3rd and 4th supralabials are in contact with the eye and the 5th is largest [from TILLACK et al. 2006]. 
CommentSynonymy: Oligodon kunmingensis KOU & WU 1993 is a synonym of P. blakewayi [Kucharzewski 2009, Sauria 31: 56]. A detailed description of this species can be found in TILLACK et al. 2006. P. blakewayi has been considered as a synonym of P. nuchalis. Plagiopholis unipostocularis has been synonymized with Plagiopholis blakewayi by ZHONG et al. 2015.

Type species: Plagiopholis blakewayi BOULENGER 1893: 301 is the type species of the genus Plagiopholis BOULENGER 1893. 
EtymologyNamed after Lieutenant Blakeway who resigned from the British army (1861) and collected reptiles in Toungyi, South Shan States (Myanmar) (1890s) (Beolens et al. 2011).
 
References
  • Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here
  • Boulenger, G.A. 1893. Catalogue of the snakes in the British Museum (Nat. Hist.) I. London (Taylor & Francis), 448 pp. - get paper here
  • Chan-ard, T., Parr, J.W.K. & Nabhitabhata, J. 2015. A field guide to the reptiles of Thailand. Oxford University Press, NY, 352 pp. [see book reviews by Pauwels & Grismer 2015 and Hikida 2015 for corrections] - get paper here
  • Cox, Merel J.; Van Dijk, Peter Paul; Jarujin Nabhitabhata & Thirakhupt,Kumthorn 1998. A Photographic Guide to Snakes and Other Reptiles of Peninsular Malaysia, Singapore and Thailand. Ralph Curtis Publishing, 144 pp.
  • Dowling, H.G., & Jenner, J.V. 1988. Snakes of Burma: checklist of reported species and bibliography. Smithsonian Herp. Inf. Serv. (76): 19 pp. - get paper here
  • Guo, P., F. J. Zhang, and Y. Y. Chen. 1999. Catalogue of type specimens of reptiles in the Herpetological Collections of Chengdu Institute of Biology,the Chinese Academy of Sciences. Asiatic Herpetological Research 8: 43~47 - get paper here
  • Kou, Zi-Tong & Wu, Jie-Yun 1993. A new species of Oligodon from Yunnan (Serpentes: Colubridae) [in Chinese]. Acta Zootaxonomica Sinica 18 (3): 379-381
  • Mell,R. 1931. List of Chinese snakes. Lingnan Sci. Jour., Canton, 8 [1929]: 199-219.
  • Smith, M.A. 1940. The Amphibians and Reptiles obtained by Mr. Ronald Kaulback in Upper Burma. Records of the Indian Museum 42: 465-486
  • Smith, M.A. 1943. The Fauna of British India, Ceylon and Burma, Including the Whole of the Indo-Chinese Sub-Region. Reptilia and Amphibia. 3 (Serpentes). Taylor and Francis, London. 583 pp.
  • Taylor,E.H. 1965. The serpents of Thailand and adjacent waters. Univ. Kansas Sci. Bull. 45 (9): 609-1096 - get paper here
  • Tillack, Frank, Ulrich Scheidt and Thomas Ihle 2006. First record of Blakeway's mountain snake, Plagiopholis blakewayi Boulenger, 1893 from Thailand, with remarks on the distribution of Plagiopholis nuchalis Boulenger, 1893 (Reptilia: Squamata: Colubridae. Pseudoxenodontinae). Veröffentlichungen des Naturkundemuseums Erfurt 25:181-186.
  • Wall, FRANK 1923. Notes on a collection of snakes from Sinlum Kaba. J. Bombay Nat. Hist. Soc. 29 (2): 466-468. - get paper here
  • Wall,F. 1921. Notes on some notable additions to the Bombay N.H.S. Snakes Collection. J. Bombay Nat. Hist. Soc. 28: 43-44 - get paper here
  • Wallach, Van; Kenneth L. Williams , Jeff Boundy 2014. Snakes of the World: A Catalogue of Living and Extinct Species. [type catalogue] Taylor and Francis, CRC Press, 1237 pp.
  • Wang K, Lyu ZT, Wang J, Qi S, Che J 2022. Updated Checklist and Zoogeographic Division of the Reptilian Fauna of Yunnan Province, China. Biodiversity Science 30 (4): 21326, 1–31 - get paper here
  • Wang, Kai; Jinlong Ren, Hongman Chen, Zhitong Lyu, Xianguang Guo Ke Jiang, Jinmin Chen, Jiatang Li, Peng Guo, Yingyong Wang, Jing Che 2020. The updated checklists of amphibians and reptiles of China. Biodiversity Science 28 (2): 189-218 - get paper here
  • Zhao E; Jiang Y; Huang Q 1978. Two new colubrid snakes from China. ZIRAN ZAZHI 2 (5): 313
  • Zhao, E.; Liu, X.; Kang, S. 1986. Five snake species new to Sichuan [in Chinese]. Acta Herpetologica Sinica 5 (2): 157 - get paper here
  • Zhao, E.M. 2006. The snakes of China [in Chinese]. Hefei, China, Anhui Sience & Technology Publ. House, Vol. I, 372 pp., Vol. II (color plates), 280 pp.
  • ZHONG, GUANG HUI; WEN DE CHEN, QIN LIU, FEI ZHU, PEI HAO PENG & PENG GUO 2015. Valid or not? Yunnan mountain snake Plagiopholis unipostocularis (Serpentes: Colubridae: Pseudoxenodontinae). Zootaxa 4020 (2): 390–396 - get paper here
 
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