Classification
Biota [regio]Animalia [regnum]
Chordata [phylum]
Reptilia [classis]
Squamata [ordo]
Serpentes [subordo]
Viperidae [familia]
Crotalus [genus]
Genus Crotalus contains the following taxa:
Crotalus adamanteus Palisot de Beauvois, 1799 [species]
Crotalus atrox Baird & Girard, 1853 [species]
Crotalus viridis Rafinesque, 1818 [species]