Crotalus pusillus
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| Crotalus pusillus | ||||||||||||||||||||
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| Crotalus pusillus Klauber, 1952 |
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- Common names: Tancitaran dusky rattlesnake.[2]
Crotalus pusillus is a venomous pitviper species found in west-central Mexico. No subspecies are currently recognized.[3]
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[edit] Description
Adult males may grow to more than 50 cm in length. Females are smaller. The largest recorded length for a specimen is 68.2 cm.[2]
[edit] Behavior
Campbell and Lamar (2004) stated that they found this species only to be active during the day. Within its range, nighttime temperatures are low and apparently restrict its activity.[2]
[edit] Geographic range
Found in west-central Mexico in the Sierra de Coalcomán of southwestern Michoacán, the Transverse Volcanic Cordillera of west-central Michoacán, and in adjacent Jalisco. It is probably also found in northeastern Colima. The type locality given is "Tancítaro, Michoacán, Mexico, altitude 5,000 ft." (5,000 ft. = 3,000 m).[1] Occurs at elevations between 1,525 m and 2,380 m.[2]
[edit] Conservation status
This species is classified as Endangered (EN) 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 5000 km², estimates indicate that its range is severely fragmented or known to exist at no more than five locations, and that a continuing decline has been, observed, inferred or projected in the area, extent and/or quality of its habitat. Therefore it is considered to be facing a very high risk of extinction in the wild. The population trend is unknown. Year assessed: 2007.[5]
[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 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 c d 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 pusillus (TSN 585828). Integrated Taxonomic Information System. Retrieved on 1 August 2007.
- ^ Crotalus pusillus 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 pusillus at the TIGR Reptile Database. Accessed 12 December 2007.
