Crotalus pusillus | |
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C. pusillus in Michoacán, Mexico | |
Scientific classification ![]() | |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Reptilia |
Order: | Squamata |
Suborder: | Serpentes |
Family: | Viperidae |
Genus: | Crotalus |
Species: | C. pusillus |
Binomial name | |
Crotalus pusillus | |
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Crotalus pusillus, or the Tancitaran Dusky Rattlesnake, is a venomous pit viper species found in west-central Mexico. No subspecies are currently recognized. [3]
Adult males may grow to more than 50 cm (20 in) in length, while females are smaller. The largest recorded length for a specimen was 68.2 cm (26.9 in). [4]
Campbell and Lamar (2004) found this species only to be active during the day. Within its range, night temperatures are low and seem to restrict its activity. [4]
It is 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. Its type locality is reported as "Tancítaro, Michoacán, Mexico, altitude 5,000 ft" (5,000 ft = 1,524 m). [2] It occurs at elevations between 1,525 and 2,380 metres (5,003 and 7,808 ft). [4]
This species is classified as Endangered on the IUCN Red List of Threatened Species. The population trend was unknown when assessed in 2007. [5]
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