Crotalus stejnegeri
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| Crotalus stejnegeri Dunn, 1919 |
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- Common names: Long-tailed rattlesnake.[2]
Crotalus stejnegeri is a venomous pitviper species found in western Mexico. No subspecies are currently recognized.[3]
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[edit] Description
Adults do not usually grow to more than 60 cm in length. The greatest length recorded for a specimen is 72.4 cm. The tail is relatively long, representing 11-14.8% of the total length of adult male snakes and 9.8-12.5% in females. Klauber (1940) suggested that, since the rattle is tiny, it is probably not audible. A very rare species known only from approximately twelve specimens.[2]
[edit] Geographic range
Found in western Mexico in the mountains and foothills of eastern Sinaloa, western Durango and probably northern Nayarit, between 500 m and 1,200 m altitude. The type locality given is "Plumosas [Plomosas], Sinaloa, Mexico."[1]
[edit] Conservation status
This species is classified as Vulnerable (VU) on the IUCN Red List of Threatened Species with the following criteria: B1ab(iii) (v3.1, 2001).[4] A species is listed as such when the best available evidence indicates that its extent of occurrence is estimated to be less than 20,000 km², estimates indicate that it is severely fragmented or known to exist at no more than 10 locations, and a continuing decline has been observed, inferred or projected in its area, extent and/or quality of habitat. Therefore, it is considered to be facing a high risk of extinction in the wild. The population trend is down. Year assessed: 2007.[5]
[edit] Habitat
Occurs in pine-oak forest, subtropical dry forest and tropical deciduous forest.[1]
[edit] See also
- List of crotaline species and subspecies
- Crotalus by common name
- Crotalus by taxonomic synonyms
- Crotalinae by common name
- Crotalinae by taxonomic synonyms
- Snakebite
[edit] References
- ^ a b c 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).
- ^ a b Campbell JA, Lamar WW. 2004. The Venomous Reptiles of the Western Hemisphere. Comstock Publishing Associates, Ithaca and London. 870 pp. 1500 plates. ISBN 0-8014-4141-2.
- ^ Crotalus stejnegeri (TSN 585829). Integrated Taxonomic Information System. Retrieved on 1 August 2007.
- ^ Crotalus stejnegeri at the IUCN Red List. Accessed 13 September 2007.
- ^ 2001 Categories & Criteria (version 3.1) at the IUCN Red List. Accessed 13 September 2007.
[edit] External links
- Crotalus stejnegeri at the TIGR Reptile Database. Accessed 12 December 2007.
