Cascabel rattlesnake
Aruba Island rattlesnake
Uracoan rattlesnake
Mexico (Tamaulipas and Nuevo Leán on the Atlantic, Michocán on the Pacific) to Costa Rica (Guanacaste and Meseta Central), including Belize, Guatemala, El Salvador, and Nicaragua; many disjunct populations in northern South America (Columbia, Venezuela Guyana, Suriname, French, Guiana, and northern Brazil); Colombia and eastern Brazil to southeastern Peru, Bolivia, Paraguay, Uruguay, and northern Argentina (Catamarca, Córdoba, Corrientes, Chaco, Entre Rios, Formosa, La Pampa, La Rioja, Mendoza, Misiones, San Juan, San Luis, Santa Fe, Santiago del Estero, and Tucumán) (McDiarmid et al., 1999).
Holotype: Lost. Originally in Claudius Grille collection (also referred to as the "Surinam Collection") and later sent to the Zoological Museum of the Royal University at Uppsala, Sweden (McDiarmid et al., 1999).
Type-locality: "America." (McDiarmid et al., 1999).
