Vipera albicornuta
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| Vipera albicornuta | ||||||||||||||||||||
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| Vipera albicornuta Nilson & Andrén, 1985 | ||||||||||||||||||||
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Common names: Iranian mountain viper, zigzag mountain viper.[3]
Vipera albicornuta is a venomous viper species endemic in Iran.[1] No subspecies are currently recognized.[4]
Description
Grows to a maximum length of 66 cm.[3]
The head is relatively small and elongated, although fairly distinct from the neck. The supraoculars are raised and separated from the eyes by a row of small scales. The nostril is centered in a large nasal scale that is partially fused with the prenasals. A loreal scale is present between the upper preocular and nasal. The supraoculars are separated by at least 7 scales, and by a total of 24-28 scales. The supraocular are separated from the supranasals by 2 canthal scales. 2 apical scales border the rostral. The rostral is wider than it is high. There are 12-16 intercanthals. The total number of scales on the top of the head is 39-40. There are 13-15 circumorbital scales with an incomplete outer ring of 13-17 scales. There are supralabials 9, separated from the eye by 1-2 scale rows. There are 11-12 sublabials, 2 large anterior chin shields, 4 posterior chin shields and 2-3 preventrals.[3]
Midbody there are 23 dorsal scale rows. The ventrals number 165-171. There are 35-38 subcaudals (in males). The anal scale is single.[3]
The color pattern consists of a grayish brown ground color with a darker brown zigzig pattern, made up of about 44-52 windings and edged with black. The belly is dark and mottled with a lighter shade. On the head, deep black bands run from the back of the eye to the angle of the mouth. Supraoculars noticeably pale. There is a row of dark blotches along each side of the dorsum. The back of the head has distinct, teardrop-shaped deep black spots. The throat is whitish with dark mottling.[3]
Geographic range
The Zanjan Valley and surrounding mountains in northwestern Iran. The type locality given is "Abhar in the Zanjan valley, between Tabriz and Tehran.[1] Mallow et al. (1993) describe the range as "parts of the Elburz, Talysh and Zanjan mountains."[3]
References
- ↑ 1.0 1.1 1.2 McDiarmid RW, Campbell JA, Touré T. 1999. Snake Species of the World: A Taxonomic and Geographic Reference, vol. 1. Herpetologists' League. 511 pp. ISBN 1-893777-00-6 (series). ISBN 1-893777-01-4 (volume).
- ↑ Golay P, Smith HM, Broadley DG, Dixon JR, McCarthy. Golray P, Schatti J-C, Toriba M. 1993. Endoglyphs and Other Major Venomous Snakes of the World: A Checklist. New York: Springer-Verlag. 393 pp.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 Mallow D, Ludwig D, Nilson G. 2003. True Vipers: Natural History and Toxinology of Old World Vipers. Krieger Publishing Company, Malabar, Florida. 359 pp. ISBN 0-89464-877-2.
- ↑ Vipera albicornuta (TSN 634983) at Integrated Taxonomic Information System. Accessed 9 May 2007.