» Common names: Montane pitvipers.Campbell JA, Lamar WW. 2004. The Venomous Reptiles of the Western Hemisphere. Comstock Publishing Associates, Ithaca and London. 870 pp. 1500 plates. ISBN 0-8014-4141-2. Cerrophidion is a genus of venomous pitvipers that are found in southern Mexico, southward through the highlands of Central America to western Panama. The name is derived from the Spanish word cerro, which means "mountain", and the Greek word ophidion, which means "small snake." Four species ar… (More on Cerrophidion)