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Sistrurus ravus
Sistrurus ravus is a venomous pitviper species, found only in Mexico. Three subspecies are currently recognized, including the nominate subspecies described here.[4] Additional recommended knowledge
DescriptionAdults of this species usually grow to a length of 40-65 cm, but may reach more than 70 cm. They are moderately stout in build.[3] The distinguishing characteristics for S. r. ravus include parietal scales that are highly variable in shape, less than 3 prefoveals, 21 midbody dorsal scales, 2-4 tail bands and a relatively large rattle.[3] Common namesMexican pigmy rattlesnake,[2] Mexican pygmy rattlesnake.[3] Local names are víbora-cascabel pigmea-mexicana (Spanish),[4] colcóatl, cascabel enana, víbora de cascabel and viborita de cascabel.[3] Geographic rangeFound only in Mexico in the mountains in the center and south of the country, west of the Isthmus of Tehuantepec. Its range includes the southeastern part of the Mexican Plateau in the highlands of Mexico, Morelos, Tlaxcala, Puebla, Veracruz, Oaxaca and the Sierra Madre del Sur in Guerrero. The type locality given is the "Table land of Mexico." Cochran (1961) interpreted this to be the "south tableland, Veracruz, Mexico."[1] Campbell and Lamar (2004) describe this species as being found across the Mexican Plateau in the temperate regions of moderate to high elevations. They estimate the vertical distribution to be from about 1,490 m above sea level to a little over 3,000 m altitude.[3] Subspecies
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References
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Sistrurus_ravus". A list of authors is available in Wikipedia. |