Bothriechis is a genus of venomous pit vipers, commonly called palm vipers or palm-pitvipers found predominantly in Mexico and Central America, although the most common species, B. schlegelii, ranges as far south as Colombia and Peru. All members are relatively slender and arboreal. The name Bothriechis is derived from the Greek words bothros and echis that mean "pit" and "viper" respectively. Ten species and no subspecies are currently generally recognized.
Ophryacus is a genus of venomous pit vipers endemic to Mexico. The name is derived from the Greek word ophrys, which means "brow", and the Latin word acus, which means "needle", an allusion to the characteristic horn-like scales over the eyes. Currently, three species are recognized and no subspecies.
Porthidium is a genus of venomous pitvipers found in Mexico and southward to northern South America. The name is derived from the Greek word portheo and the suffix -idus, which mean "destroy" and "having the nature of", apparently a reference to the venom. As of August 2016 nine species are recognized as being valid. The snakes of the genus Hypnale in southern India and Sri Lanka look quite similar to those of this genus, possibly an example of convergent evolution.
Crotalus intermedius gloydi is a subspecies of venomous pitviper in the family Viperidae. The subspecies is endemic to Mexico in the states of Oaxaca and Puebla.
Atropoides picadoi, also known as Picado's jumping pitviper, is a species of venomous snake, a pitviper in the subfamily Crotalinae of the family Viperidae. The species is endemic to Costa Rica. There are no subspecies that are recognised as being valid. It is monotypic in the genus Atropoides.
Mixcoatlus barbouri is a venomous pit viper species endemic to Mexico. No subspecies are currently recognized.
Cerrophidion godmani is a venomous pit viper species native to southern Mexico and Guatemala. No subspecies are recognized as being valid. It is also known commonly as Godman's montane pit viper or Godman's pit viper.
Cerrophidion tzotzilorum is a venomous pit viper species which is native to southern Mexico. There are no subspecies that are recognized as being valid.
Porthidium yucatanicum is a venomous pitviper species found in Mexico. No subspecies are currently recognized.
Porthidium lansbergii is a species of venomous snake, a pitviper in the family Viperidae. The species is endemic to Central and South America. Four subspecies are recognized, including the nominate subspecies described here.
Metlapilcoatlus mexicanus is a venomous pitviper species endemic to Mexico and Central America.
Metlapilcoatlus occiduus is a venomous pitviper subspecies endemic to southern Mexico, Guatemala, and El Salvador.
Gloydius strauchi is a species of venomous pit viper in the subfamily Crotalinae of the family Viperidae. The species is native to western China. It is a small snake with a pattern of four longitudinal stripes, although some older specimens may be a uniform black. G. strauchi may be distinguished from G. monticola by its higher midbody dorsal scale count. This species jointly holds the altitude record for pitvipers together with Crotalus triseriatus of Mexico, both being found even above the tree line at over 4,000 m (13,000 ft). No subspecies were recognized as being valid, until a recent publication re-evaluated the taxonomic statuses of populations of G. strauchi and described the eastern Tibetan populations as a new species.
Bothrops medusa is a venomous pitviper species endemic to Venezuela. No subspecies are currently recognized.
Bothrops oligolepis is a venomous pitviper species found in Peru and Bolivia. The specific name is derived from the Greek words oligo and lepis, meaning "few scales"; probably an allusion to the lower numbers of dorsal and ventral scales that it has compared to B. bilineatus. No subspecies are currently recognized.
Bothrops pulcher is a venomous pitviper species found in South America. The specific name is Latin, meaning "beautiful", in reference to the color pattern. No subspecies are currently recognized.
Bothrops punctatus is a venomous pitviper species found in Ecuador, Mostly in the Chocó Department in Western Colombia and Panama. No subspecies are currently recognized.
Bothrops bilineatus smaragdinus is a venomous pitviper subspecies found in the northern and western Amazon region of South America.
Bothrocophias campbelli, commonly known as Campbell's toadheaded viper, the Ecuadorian toadheaded pitviper, and víbora boca de sapo in Spanish, is a species of venomous pitviper in the family Viperidae. The species is endemic to South America. No subspecies are currently recognized.
Crotalus ruber lucasensis is a venomous pitviper subspecies found in Mexico in the Cape region of lower Baja California.
