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Azemiops kharini ORLOV, RYABOV & NGUYEN, 2013

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Higher TaxaViperidae, Azemiopinae, Colubroidea, Alethinophidia, Serpentes, Squamata (snakes) 
Common NamesE: White-headed Fea Viper, White-headed Burmese viper
G: Weisskopf-Fea-Viper 
SynonymAzemiops kharini ORLOV, RYABOV & NGUYEN 2013: 119
Azemiops albocephala ORLOV, RYABOV & NGUYEN 2013: 112 
DistributionVietnam (Vinh Phuc, Cao Bang, Lang Son, Tam Dao Mountains), E China (E Yunnan, Guangxi, Guizhou, eastern Sichuan, Fujian, Zhejiang, Jiangxi, Shaanxi)

Type locality: Tam Dao Mountain, Tam Dao Village, Vinh Phuc Province, Vietnam; 900 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: ZISP 26028, adult male, collected on 12 June 2003 by N. L. Orlov and S. A. Ryabov.
Paratypes. 8 specimens: ZISP 20010, juv., Tam Dao Mountain, Tam Dao Village, Vinh Phuc Province, Viet- nam; 750 – 900 m a.s.l., collected on October 1975 by Nguyen Van Sang; ZISP 22747 male, Tam Dao Moun- tain, Tam Dao Village, Vinh Phuc Province, Vietnam; 750 – 900 m a.s.l., collected on October 2001 by N. L. Orlov and S. A. Ryabov; ZISP 26806 female, Tam Dao Mountain, Tam Dao Village, Vinh Phuc Province, Viet- nam; 900 m a.s.l., collected on 13 June 2003 by N. L. Or- lov and S. A. Ryabov; ZISP 26804 female, ZISP 26805 male, Thanh Cong village, Nguyen Binh district, Cao Bang Province, Vietnam, 1300 m a.s.l., collected on 15 – 17 June 2003 by N. L. Orlov and S. A. Ryabov; ZISP 26807 male, ZISP 26802 female, Quang Thanh village, Nguyen Binh district, Cao Bang Province, Vietnam, 1100 m a.s.l., collected on 18 – 21 June 2003 by N. L. Orlov and S. A. Ryabov; ZISP 26803 male, Mau Son, Loc Binh district, Lang Son Province, Vietnam, 820 m a.s.l., on 11 June 2006 by N. L. Orlov and S. A. Ryabov. 
CommentSimilar species: this species has been confused with A. feae although they are easy to distinguish by the color of their heads. A. kharini may be a color variant of A. feae.

Synonymy: Orlov et al. used the name Azemiops albocephala in Figures 5 and 6 before they used the name A. kharini (in the rest of the manuscript starting in Figure 8). The authors probably wanted to name the species A. albocephala but then learned that Vladimir Kharin had passed, so they changed the name but not throughout the manuscript.

Distribution: Very likely is the parapatry of these species in Yunnan, Sichuan and north Vietnam. Azemiops feae occurs to the west of the Red River (Sông HôÌng), and Azemiops kharini sp. nov. — to the east of the Red River.

Diagnosis. Viperid medium-sized snake of genus Azemiops, up to 980 mm in body length with a tail. The head is well demarcated from the body by neck interception, noticeably flattened, covered with symmetrical shields. Head has a trapezoidal shape with slightly rounded short snout. Nostril in a single nasal; loreal pres- ent; eye relatively small, with vertical pupil. The body is nearly round in cross-section, slightly flattened dorso- ventrally, ventrals rounded. Scales smooth, in 17 rows around the middle of the body. Tail short; subcaudals in two rows. Ventrals 183 – 199; anal entire; subcaudals 49 – 51 pairs. Upper surface of head (from the prefron- tals) white with two black vertical stripes. Pterygoideum with 14 teeth. Angulare very small, shorter than spleniale and much shorter than dentale. Dentale with 15 – 16 teeth. Quadratum long, directed downward and backward, and articulates with pterygoideum which bears 14 teeth. 186 – 201 trunk vertebrae, 46 – 51 caudal vertebrae. Hypopophyses developed on all trunk vertebrae, they are much shorter than the spinous processes. Parapophyses without long ventral processes. Parietale broadly rounded on the sides along its entire length, the greatest width is recorded in the back part of the bone without a median ridge.
A. kharini can be distinguished from A. feae by the shape of the basisphenoid (Fig. 5H) and the basioccipital (Fig. 6A). The basisphenoid of A. kharini has the same shape of the anterior part of this bone as in A. feae, but in A. kharini the bone is shorter, missing widened posterior part. The basiccipital of A. kharini has no tubercles on the anteroventral part, while in A. feae there are two tubercles there. In addition, A. kharini has lower medial process of the compound bone. [Snetkov & Orlov 2017]. 
EtymologyThe species is named in honor of the untimely passed zoologist Vladimir Kharin, who made a great contribution to the study of the fauna of fish and reptiles, including snakes, in Asia. 
  • Balanov A. A., Zemnukhov V. V., Epur I. V., Parensky V. A., Pitruk D. L., Dolganov V. N., Savelyev P. A., Maslova I. V., Adnagulov E. V., Ananjeva N. B. 2014. VLADIMIR EMELYANOVICH KHARIN (1957 – 2013). Russ. J. Herpetol. 21 (1): 74 – 78
  • Orlov, Nikolai L.; Sergei A. Ryabov, Tao Thien Nguyen 2013. On the Taxonomy and the Distribution of Snakes of the Genus Azemiops Boulenger, 1888: Description of a New Species. Russ. J. Herpetol. 20 (2): 110-128 - get paper here
  • Snetkov, P. B.; N. L. Orlov 2017. Phylogenetic Analysis of Old World Viperid Snakes (Serpentes, Viperidae) Based on Skeletal Morphology Russ. J. Herpetol. 24 (1): 22-34 - get paper here
  • Баланов, А. А.; В. В. Земнухов, И. В. Епур, В. А. Паренский, Д. Л. Питрук, В. Н. Долганов, П. А. Савельев, И. В. Маслова, Э. В. Аднагулов 2013. In commemoration of Vladimir E. Kharin (1957–2013). Current Studies in Herpetology 13 (3/4): 170–175 - get paper here
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