» Common names: Montane pitvipers. Cerrophidion is a genus of venomous pitvipers that are found in southern Mexico, southward through the highlands of Central America to western Panama. Description These snakes grow to a maximum length of 82.2 cm (for C. godmani), but usually don't exceed more than 50-55 cm. The head scalation is highly variable, with some being enlarged, especially in the frontal region. The fact that the prelacunal isn't fused with any of the supralabial scales is characteris… (More on Cerrophidion)