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Achalinus sheni MA, XU, QI, WANG, TANG, HUANG & JIANG, 2023

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Higher TaxaXenodermidae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Shen’s Odd-scale Snake, Shen’s Burrowing Snake
Chinese: 沈氏脊蛇 (Shěn Shì Jǐ Shé) 
SynonymAchalinus sheni MA, XU, QI, WANG, TANG, HUANG & JIANG 2023
Achalinus spinalis — LI et al. 2010
Achalinus sheni — MA et al. 2024 
DistributionChina (Hunan)

Type locality: (27°55′11′′N, 111°55′3′′E; 408 m a. s. l.), Qixingjie Town, Lianyuan City, Hunan Province, China.  
Reproduction 
TypesHolotype. ANU20230014 (field number HSR23019, Fig. 3), an
adult male, collected on 21 March 2023 by the team of Song Huang. Paratypes. Three males, ANU20230012 (field number HSR23011, Fig. 4A), ANU20230013 (field number HSR23012, Figs 4B, 5), ANU20230015 (subadult male, field number HSR23020, Fig. 4C), with the same collecting information as the holotype; CIB 119043, a juvenile male, collected on 20 October 2015 by Bing Zhou and Shanshan Tang from Shumuyuan, Nanyue District, Hunan Province, China (27°15′59′′N, 112°43′15′′E; 358 m a.s.l., Fig. 4D). 
DiagnosisDiagnosis: (1) dorsal scales strongly keeled, 23 rows throughout the body, the outmost row smooth and significantly enlarged ; (2) tail relatively short, TaL/TL 0.183 ~ 0.224; (3) the suture between internasals subequal to the suture between prefrontals; (4) loreal one, subrectangular, LorH/LorL 0.53 ~ 0.57; (5) ventrals 161–170, anal entire, subcaudals 55–61, not paired; (6) the length of supraocular equal to or longer than the length of upper anterior temporal; (7) vertebral line inconspicuous and subcaudal streak absent. (Ma et al. 2023)


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Comment 
EtymologyNamed after Chinese herpetologist, Prof. You-Hui Shen (沈猷慧), who worked in Hunan Normal University and made great contributions to the herpetological research of China, particularly in Hunan Province where the new species is found. 
References
  • Ma S, Xu Y-H, Qi S, Wang Y-Y, Tang S-S, Huang S, Jiang J-P 2023. Discovery of a new cryptic Achalinus Peters, 1869 (Serpentes, Xenodermidae) species from Hunan Province, China. ZooKeys 1181: 9–27 - get paper here
  • Ma Y-h, Liu J-y, Li H, Zhou L, Xu Y-h, Peng D-y, Zhang Z-q, Mo X-y 2024. First description of the female of Achalinus sheni (Serpentes, Xenodermidae), with expanded description of this species. Herpetozoa 37: 189-195 - get paper here
 
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