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Achalinus hunanensis MA, SHI, XIANG, SHU & JIANG, 2023

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Higher TaxaXenodermidae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Hunan Odd-scale Snake, Hunan Burrowing Snake,
Chinese: 湖南脊蛇 (Hú Nán Jǐ Shé) 
SynonymAchalinus hunanensis MA, SHI, XIANG, SHU & JIANG 2023
Achalinus ater — SHU et al. 2014
Achalinus ater — SHEN et al. 2014
Achalinus ater — GAO et al. 2022 
DistributionChina (Hunan)

Type locality: Huangyan Village, Hecheng District, Huaihua City, Hunan Province, China (27°28′N, 110°02′E; ca. 880 m a.s.l.).  
Reproduction 
TypesHolotype. CIB 119039 (Collection No. 20130505001), subadult male (Fig. 4), collected in early May 2013, by Sheng-Chao Shi and Sun-Jun Xiang.
Paratype. CIB 119040, subadult male (Fig. 5), collected on 16 June 2022, by Sheng-Qiang Liu from Wazizhai, Ningxiang County, Changsha City, Hunan Prov- ince, China (28°00′N, 111°53′E; ca. 1020 m a.s.l.). 
DiagnosisDiagnosis. (1) 23 rows of dorsal scales throughout the body, all dorsal scales strongly keeled, and the outmost one strongly keeled and enlarged; (2) tail relatively short, TaL/TL 0.221 ~ 0.225; (3) maxillary teeth 23; (4) the suture between internasals 2 × as long as that between prefrontals; (5) loreal one, subrectangular, LorH/LorL 0.62 ~ 0.70; (6) supralabials six, the 4th and 5th touch the eye; (7) the two anterior temporals in contact with eye; (8) ventrals 163–165, subcaudals 69–72, not paired. (Ma et al. 2023)


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Comment 
EtymologyNamed after its known distribution range, which is endemic to Hunan Province. 
References
  • Ma S, Shi S-C, Xiang S-J, Shu F, Jiang J-P 2023. A new species of Achalinus Peters, 1869 (Squamata, Xenodermidae) from Hunan Province, China. ZooKeys 1166: 315-331 - get paper here
 
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