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Sinonatrix yunnanensis RAO & YANG, 1998

IUCN Red List - Sinonatrix yunnanensis - Least Concern, LC

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Higher TaxaColubridae (Natricinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) 
Common NamesE: Yunnan Annulate Keelback, Yunnan Water Snake
Vietnamese: Ran hoa can van nam
Chinese: “Yun Nan Hua You She” ( 云南华游蛇 ) 
SynonymSinonatrix yunnanensis RAO & YANG 1998
Sinonatrix yunnanensis — VOGEL et al. 2004
Sinonatrix yunnanensis — WALLACH et al. 2014: 677
Trimerodytes yunnanensis — REN et al. 2019 
DistributionChina (Jingdong, Menglian, Jinggu, Yongde, Lufeng Yunnan, China), Thailand, Vietnam

Type locality: Dingpa of Jingdong County, Yunnan 1700 m elevation), China  
TypesHolotype: KIZ 75II0191, adult male, May 11, 1975. 
DiagnosisDiagnosis. The new species is very similar to Sinonatfix aequifasciata (Barbour) and typically with X marks on the side of body and tail, but with 31- 35 maxillary teeth and 156 - 165 ventrals which obviously differ from S. aequifasciata; the later have 23 - 28 maxillary teeth and 142 - 154 ventrals [from RAO & YANG 1998]. 
  • Das, I. 2012. A Naturalist's Guide to the Snakes of South-East Asia: Malaysia, Singapore, Thailand, Myanmar, Borneo, Sumatra, Java and Bali. Oxford J, ohn Beaufoy Publishing - get paper here
  • Le, Dzung Trung; Anh Van Pham, Cuong The Pham, Son Lan Hung Nguyen, Thomas Ziegler, Truong Quang Nguyen 2015. Review of the Genus Sinonatrix in Vietnam with a New Country Record of Sinonatrix yunnanensis Rao et Yang, 1998. Russ. J. Herpetol. 22 (2): 84-88
  • Pauwels, O.S.G.; Kunya, K.; David, P. & Sumontha, M. 2009. First record of the Yunnan Keelback Sinonatrix yunnanensis RAO & YANG 1998 (Serpentes: Natricidae) from Thailand. Salamandra 45 (3): 165-169 - get paper here
  • Rao, DING QI & D. T. YANG. 1998. A new species of Sinonatrix (Serpentes: Colubridae) of China with preliminary survey on Sinonatrix. Russ. J. Herpetol. 5 (1): 70-73. - get paper here
  • REN, Jinlong; Kai WANG, Peng GUO, Yingyong WANG, Tao Thien NGUYEN, and Jiatang LI 2019. On the Generic Taxonomy of Opisthotropis balteata (Cope, 1895) (Squamata: Colubridae: Natricinae): Taxonomic Revision of Two Natricine Genera. Asian Herpetological Research 10(2): 105–128; DOI: 10.16373/j.cnki.ahr.180091 - get paper here
  • Vogel, Genot; Patrick David, Olivier S. G. Pauwels and Norbert Brachtel 2004. On the occurence of the watersnake Sinonatrix aequifasciata (Barbour, 1908) (Serpentes, Colubridae, Natricinae) in Vietnam. Hamadryad 29 (1): 110 – 114
  • 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.
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