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Higher TaxaViperidae, Viperinae, Colubroidea, Alethinophidia, Serpentes, Squamata (snakes) 
Common Names 
Pelias darevskii — TUNIYEV et al., 2009 (part)
Pelias darevskii — AVCI et al. 2010
Pelias olguni — WALLACH et al. 2014: 544 
DistributionTurkey (Upper Flow of the Kura River)

Type locality: Turkey, Ardahan Province, Town Posof, Mt. Ilgar-Dag, (2020 m elevation). Map legend:
TDWG region - Region according to the TDWG standard, not a precise distribution map.

NOTE: TDWG regions are generated automatically from the text in the distribution field and not in every cases it works well. We are working on it.
TypesHolotype: SNP 866, Herpetological collection of the Sochi National Park, Sochi, SNP 866, adult female, 21 July 2011, collectors B. Tuniyev, S. Tuniyev, A. Avci.
Paratypes. Fifteen specimens: herpetological collection of the Sochi National Park, Sochi, 13 specimens; Zoology Department Ege University, Zoology Lab. of the Department of Biology at Buca Education Faculty, Turkey (ZDEU). 
CommentPelias is typically considered as a subgenus, hence we follow this use here.

Diagnosis. Small-sized snake, different from a related species Darevsky’s viper by the having smaller sizes of trunk, body, tail, lower number of preventrals, sublabials and wings of zigzag; by the having higher number of scales round a neck and middle of body, supralabials and crown shields. Parietal shields have incision in most of the specimens. Animals from above are painted in gray and russet tones; a zigzag does not consist of numerous transversal prolate spots, only in some part united. Belly from dark spotted to almost black. 
EtymologyThe species is named in honor of Prof. Dr. Kurtulus Olgun. 
  • Tuniyev B.S., Tuniyev S.B., Avcı A., Ilgaz Ç. 2014. Herpetological studies in Eastern and North-Eastern Turkey. Current Studies in Herpetology 14 (1/2): 44–53. Резюме - get paper here
  • Tuniyev, S. B.; A. Avcı, B. S. Tuniyev, A. L. Agasian, L. A. Agasian 2013. Description of a New Species of Shield-Head Vipers - Pelias olguni sp. nov. from Basin of Upper Flow of the Kura River in Turkey. Russ. J. Herpetol. 19 (4): 314-332 - get paper here
  • Wallach, Van; Kenneth L. Williams , Jeff Boundy 2014. Snakes of the World: A Catalogue of Living and Extinct Species. Taylor and Francis, CRC Press, 1237 pp.
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