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Achalinus vanhoensis HA, ZIEGLER, SY, LE, NGUYEN & LUU, 2022

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Higher TaxaXenodermidae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies 
Common NamesE: Van Ho burrowing snake 
SynonymAchalinus vanhoensis VAN HA, ZIEGLER, SY, LE, NGUYEN & LUU 2022 
DistributionVietnam (Son La)

Type locality: limestone forest (20°46.327’N, 105°45.677’E, 1121 m a.s.l.), Hua Tat Village, Van Ho Commune, Van Ho District, Son La Province, northern Vietnam.  
Reproduction 
TypesHolotype: VNUF R.2019.13 (field number VH.19.13), adult male, collected by A. P. Trang, on 12 February 2019 
DiagnosisDiagnosis: Achalinus vanhoensis sp. nov. is characterized by a combination of the following morphological characters: 1) maxillary teeth 32; 2) suture between the internasals distinctly longer than that between the prefrontals; 3) loreal absent, prefrontals stretch towards the supralabials; 4) dorsal scales in 25–23–23 rows, keeled; 5) two pairs of prefrontals; 6) supralabials six (left) and seven (right); 7) infralabials six; 8) temporals 2+2, the two anterior temporals in broad contact with eye; 9) ventrals 176; 10) subcaudals 84, all entire; 11) cloacal plate entire; 12) dorsum in preservative dark purple grey; 13) venter somewhat lighter with yellow-edged scales in the chin region, including infralabials; 14) posterior edges of ventrals and subcaudals with yellow margin (Ha et al. 2022).


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CommentAbundance: only known from a single specimen (2023). 
EtymologyNamed after its type locality, Van Ho District, where the new Achalinus was discovered. 
References
  • HA, N. V., ZIEGLER, T., SY, T. D., LE, M. D., NGUYEN, T. Q., & LUU, V. Q. 2022. A new species of the genus Achalinus (Squamata: Xenodermidae) from Son La Province, Vietnam. Zootaxa 5168 (3): 375-387 - get paper here
 
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