- Crotalus oreganus lutosus
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Crotalus oreganus lutosus 
Scientific classification Kingdom: Animalia Phylum: Chordata Subphylum: Vertebrata Class: Reptilia Order: Squamata Suborder: Serpentes Family: Viperidae Subfamily: Crotalinae Genus: Crotalus Species: C. oreganus Subspecies: C. o. lutosus Trinomial name Crotalus oreganus lutosus
Klauber, 1930Synonyms - Common names: Great Basin rattlesnake.[3]
Crotalus oreganus lutosus is a venomous pitviper subspecies[4] found in the Great Basin region of the United States.
Contents
Description
Adult specimens are 66-121 cm in length,[3] but rarely exceed an overall length of 1 m.[5] The males grow larger than the females.[3]
On the subject of scalation, one of the more distinctive characteristics of this subspecies is that it has three or more internasal scales -- something that it has in common with C. viridis.[5]
The color pattern usually consists of a buff, pale gray, pale brown, olive brown or yellowish brown ground color, overlaid with a series of 32-49 dorsal blotches. These blotches are dark brown to black in color, with pale centers and pale borders, and are often irregular in shape and wider than they are long. There is also a series of lateral blotches that are indistinct anteriorly, but become more distinct posteriorly and eventually merge with the dorsal blotches to form crossbands. Older specimens either have sometimes have a faded pattern, or they may have uniformly black blotches, with the dorsum of the head also being black.[5]
Geographic range
The United States in the Great Basin region. Its range includes Idaho south of lat. 44° North, Utah west of long. 111° West, Arizona west and north of the Colorado River as well as the north rim of the Grand Canyon, the entire state of Nevada (excluding Esmeralda, Nye and Clark counties), California east of the Sierra Nevada from Lower Klamath Lake south to below Lake Mono, Oregon south and east of the line Upper Klamath Lake-Fort Rock-Burns-Council (Idaho).[6] The type locality is "10 miles northwest of Abraham on the Road to Joy, Millard County, Utah."[1]
Habitat
Inhabits the dry and barren areas of the Great Basin region, being found on hills, summits and old lake benches. They are said to prefer southern exposures among rocks and boulders on hillsides and buttes, low foothills, mountainsides, open deserts, alfalfa fields and valley floors.[3]
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
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).
- ^ Ashton KG, de Queiroz A. 2001. Molecular systematics of the western rattlesnake, Crotalus viridis (Viperidae), with comments on the utility of the d-loop in phylogenetic studies of snakes. Molecular Phylogenetics and Evolution, Vol. 21, No.2, pp. 176-189. PDF at CNAH. Accessed 3 September 2008.
- ^ a b c d Wright AH, Wright AA. 1957. Handbook of Snakes. Comstock Publishing Associates. (7th printing, 1985). 1105 pp. ISBN 0-8014-0463-0.
- ^ "Crotalus oreganus lutosus". Integrated Taxonomic Information System. http://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=683066. Retrieved 19 June 2007.
- ^ a b c 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.
- ^ Klauber LM. 1997. Rattlesnakes: Their Habitats, Life Histories, and Influence on Mankind. Second Edition. First published in 1956, 1972. University of California Press, Berkeley. ISBN 0-520-21056-5.
External links
- Crotalus oreganus at the Reptarium.cz Reptile Database. Accessed 12 December 2007.
- Crotalus oreganus lutosus - Great Basin Rattlesnake at California Herps. Accessed 19 June 2007.
Categories:- Crotalus
- Reptiles of the United States
- Fauna of the Great Basin desert region
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