Porthidium volcanicum, the Ujarran hognosed pit viper, is a pit viper species endemic to Costa Rica.[1] No subspecies are currently recognized.
Adults of P. volcanicum are moderately stout, with females growing to 31- in total length (including tail). The only male ever collected was 25.9frac=4NaNfrac=4 long.
Porthidium volcanicum is known only from the type locality, which is given as "Ujarrás de Buenos Aires (Valle del General, suoeste de la provincia de Puntarenas, Costa Rica)", Volcán de Buenos Aires and Valle del General in Puntarenas Province, Costa Rica.
Porthidium volcanicum occurs in tropical moist forest. The region receives 3500mm of rainfall annually and has a dry season January–April.[1]