Crotalus armstrongi

Crotalus armstrongi, the western dusky rattlesnake, is a species of pit viper in the family Viperidae. The species is endemic to Mexico. It is a relatively small venomous snake and is known for its distinctive dusky coloration.^[1] No subspecies are recognized.^[2]

Crotalus armstrongi
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Squamata
Suborder:	Serpentes
Family:	Viperidae
Genus:	Crotalus
Species:	C. armstrongi
Binomial name
Crotalus armstrongi Campbell, 1979
Synonyms
Crotalus triseriatus armstrongi Campbell 1979