1.1 Aspidelaps lubricus lubricus
1.1 Crotalus molossus molossus (Madera Canyon, Santa Rita mtns, Arizona)
1.1 Crotalus molossus nigrescens (Durango, Mexico)
1.1 Crotalus molossus nigrescens (Sierra del Nido, Chihuahua, Mexico)
1.1 Naja atra
1.1 Naja mossambica
1.0 Naja siamensis
1.1 Rhamphiophis rostratus
1.1 Sistrurus catenatus edwardsi (San Bernardino valley, Arizona)
2.2 Vipera aspis aspis (Creuse, Limousin, France)