Vipera wagneri
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| Paul James Cowie 15:16, 17 February 2007 (CST) |
| Vipera wagneri | ||||||||||||||||||||
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| Vipera wagneri Nilson & Andrén, 1984 | ||||||||||||||||||||
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Common names: ocellated mountain viper, Wagner's viper.[2]
Vipera wagneri is a venomous viper species found in eastern Turkey and northwest Iran. No subspecies are currently recognized.[3]
Description
Grows to a maximum length of 70-95 cm.[2]
The head is relatively large, elongate and distinct from the neck. The snout is rounded and covered with small keeled scales. The rostal is in contact with 2-3 apical scales. The eyes are in broad contact with the large supraoculars and surrounded by 12-15 circumorbital scales. Across the top of the head, there are 6-7 interocular scales. There are usually 12-13 sublabials and 9 supralabials. The latter are separated from the eye by 1-2 scale rows. The nostril is located within a single nasal scale. The temporal scales are keeled and there is usually one canthal scale on either side of the head.[2]
Midbody there are 23 rows of keeled dorsal scales. There are 2-3 preventral scales, 161-170 ventrals and 23-31 paired subcaudals. The anal plate is single.[2]
The color pattern consists of a grayish ground color overlaid with a central series of occasionally connected blotches or spots that run from the back of the head to the tail. These blotches are light brown to yellowish brown or orange with black borders and each is 4-8.5 scales wide.
The top of th head usually has two black elongated blotches that form a large dark open V marking, but without an apex. The arms of the V end on the neck. There is usually a dark stripe that runs from the corner of the eye to the angle of the mouth.[2]
Geographic range
The mountains of eastern Turkey and adjacent northwest Iran. The type locality given is "vicinity of Lake Urmia (Armenisch-Persische Grenze)" [Armenian-Persian border] (Province Azerbaijan, northwestern Iran).[1]
Conservation status
This species is classified as Endangered (EN) according to the IUCN Red List of Threatened Species with the following criteria: A1d+2d, B1+2e, C1 (v2.3, 1994).[4] This indicates a population reduction in the form of an observed, estimated, inferred or suspected reduction of at least 50% over the last 10 years or three generations, whichever is the longer, based on actual or potential levels of exploitation. For the same reason, a reduction of at least 50% is projected or suspected to be met within the next 10 years or three generations, whichever is the longer. The extent of occurrence is estimated to be less than 5,000 km² or area of occupancy estimated to be less than 500 km², and indicate that the population is either severely fragmented or known to exist at no more than five locations. In addition, a continuing decline is inferred, observed or projected in number of mature individuals. The total population is estimated to number less than 2500 mature individuals and will likely suffer a decline of at least 20% within five years or two generations, whichever is longer. Year assessed: 1996.[5]
This species is also listed on CITES Appendix II, which means that it is not necessarily threatened with extinction, but may become so if it is not listed.[6] It is, however, listed as a strictly protected species (Appendix II) under the Berne Convention.[7]
Habitat
Found at altitudes of 1600-1900 m in rocky and grassy habitats.[1]
See also
Cited 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).
- ↑ 2.0 2.1 2.2 2.3 2.4 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 wagneri (TSN 635003). Integrated Taxonomic Information System. Accessed on 19 August 2006.
- ↑ Vipera wagneri at IUCN Red List. Accessed 6 October 2006.
- ↑ 1994 Categories & Criteria (version 2.3)IUCN Red List. Accessed 6 October 2006.
- ↑ Vipera wagneri at CITES and United Nations Environment Programme / World Conservation Monitoring Centre. Accessed 8 October 2006.
- ↑ Convention on the Conservation of European Wildlife and Natural Habitats, Appendix II at Council of Europe. Accessed 9 October 2006.
External links
- Species Vipera wagneri at the Species2000 Database