This is a list of all sure genera,

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

and subspecies of the subfamily

Crotalinae The Crotalinae, commonly known as pit vipers,Mehrtens JM (1987). ''Living Snakes of the World in Color''. New York: Sterling Publishers. 480 pp. . crotaline snakes (from grc, κρόταλον ''krotalon'' castanet), or pit adders, are a subfa ...

, otherwise referred to as crotalines, pit vipers, or pitvipers, and including rattlesnakes ''

Crotalus ''Crotalus'' is a genus of venomous pit vipers in the family Viperidae, known as rattlesnakes or rattlers. Wright AH, Wright AA (1957). ''Handbook of Snakes of the United States and Canada''. Ithaca and London: Comstock Publishing Associates (7t ...

'' and ''

Sistrurus :''Common names: ground rattlesnakes, pygmy rattlesnakes, massasaugas'' Wright AH, Wright AA (1957). ''Handbook of Snakes of the United States and Canada''. Ithaca and London: Comstock Publishing Associates, a Division of Cornell University Press ...

''. This list follows the

taxonomy Taxonomy is the practice and science of categorization or classification. A taxonomy (or taxonomical classification) is a scheme of classification, especially a hierarchical classification, in which things are organized into groups or types. ...

as of 2007 provided by

ITIS The Integrated Taxonomic Information System (ITIS) is an American partnership of federal agencies designed to provide consistent and reliable information on the taxonomy of biological species. ITIS was originally formed in 1996 as an interagen ...

, which was based on the continuing work of Dr. Roy McDiarmid.McDiarmid RW, Campbell JA, Touré T. 1999. Snake Species of the World: A Taxonomic and Geographic Reference, vol. 1. Herpetologists' League. 511 pp. (series). (volume). with the addition of more recently described species.

Species list

* ''

Agkistrodon ''Agkistrodon'' is a genus of venomous pit vipers commonly known as American moccasins.Crother, B. I. (ed.). 2017. ''Scientific and Standard English Names of Amphibians and Reptiles of North America North of Mexico, with Comments Regarding Confi ...

'', American ground pit vipers ** '' Agkistrodon bilineatus'', Mexican ground pit viper ** ''

Agkistrodon contortrix The eastern copperhead (''Agkistrodon contortrix''), also known as the copperhead, is a species of venomous snake, a pit viper, endemic to eastern North America; it is a member of the subfamily Crotalinae in the family Viperidae. The eastern co ...

'', Copperhead *** '' Agkistrodon contortrix contortrix'', Southern copperhead *** '' Agkistrodon contortrix laticinctus'', Broad-banded copperhead *** '' Agkistrodon contortrix mokasen'', Northern copperhead *** '' Agkistrodon contortrix phaeogaster'', Osage copperhead *** '' Agkistrodon contortrix pictigaster'', Trans-Pecos copperhead ** ''

Agkistrodon howardgloydi ''Agkistrodon howardgloydi'' is a species of venomous snake, a pit viper (Crotalinae), that is endemic to Central America. It is most commonly called castellana,Conant, R. 1984. ''A new subspecies of the pit viper Agkistrodon bilineatus (Reptilia ...

'', Castellana ** '' Agkistrodon piscivorus'',

Cottonmouth ''Agkistrodon piscivorus'' is a species of pit viper in the subfamily Crotalinae of the family Viperidae. It is one of the world's few semiaquatic vipers (along with the Florida cottonmouth), and is native to the southeastern United States. As ...

also known as the Water Moccasin *** '' Agkistrodon piscivorus conanti'', Florida cottonmouth *** ''

Agkistrodon piscivorus leucostoma The western cottonmouth (''Agkistrodon piscivorus leucostoma'')Conant R. 1975. ''A Field Guide to Reptiles and Amphibians of Eastern and Central North America''. Second Edition. First published in 1958. Houghton Mifflin Company Boston. 429 pp. 48 ...

'', Western cottonmouth *** '' Agkistrodon piscivorus piscivorus'', Eastern cottonmouth ** ''

Agkistrodon russeolus ''Agkistrodon russeolus'', commonly called the Yucatecan cantil, Gloyd HK, Conant R (1990). ''Snakes of the ''Agkistrodon'' Complex: A Monographic Review''. Society for the Study of Amphibians and Reptiles. 614 pp., 52 plates. LCCN 89-50342. . ...

'', Yucatecan ground pit viper ** '' Agkistrodon taylori'', Taylor's ground pit viper * '' Atropoides'', Jumping pit vipers ** '' Atropoides picadoi'', Picado's jumping pit viper * ''

Bothriechis ''Bothriechis'' is a genus of venomous pit vipers, commonly called palm vipersMehrtens JM. 1987. ''Living Snakes of the World in Color''. New York: Sterling Publishers. 480 pp. . or palm-pitvipersCampbell JA, Lamar WW. 2004. ''The Venomous Rept ...

'', American palm pit vipers ** '' Bothriechis aurifer'', Yellow-blotched palm pit viper ** ''

Bothriechis bicolor :''Common names: Guatemalan palm-pit viper,Campbell JA, Lamar WW. 2004. The Venomous Reptiles of the Western Hemisphere. 2 volumes. Comstock Publishing Associates, Ithaca and London. 870 pp. 1500 plates. . Guatemalan tree viper.Mehrtens JM. 1987. ...

'', Guatemalan palm pit viper ** '' Bothriechis guifarroi'', Guifarro's palm pit viper ** ''

Bothriechis lateralis :''Common names: side-striped palm pitviper side-striped palm viper,
a
Bothriechis marchi'', Honduran palm pit viper ** '' Bothriechis nigroviridis'', Black-speckled palm pit viper ** '' Bothriechis nubestris'', Talamancan palm pit viper ** '' Bothriechis rowleyi'', Mexican palm pit viper ** '' Bothriechis schlegelii'',

Eyelash viper ''Bothriechis schlegelii'', known commonly as the eyelash viper, is a species of venomous pit viper in the family Viperidae. The species is native to Central and South America. Small and arboreal, this species is characterized by a wide array of ...

** '' Bothriechis supraciliaris'', Blotched palm pit viper ** '' Bothriechis thalassinus'', Merendon palm pit viper * '' Bothrocophias'' ** '' Bothrocophias andianus'', Andean lancehead ** '' Bothrocophias campbelli'', Ecuadorian toad-headed pit viper ** '' Bothrocophias colombianus'', Colombian toad-headed pit viper ** '' Bothrocophias hyoprora'', Amazonian toad-headed pit viper ** '' Bothrocophias microphthalmus'', Small-eyed toad-headed pit viper ** '' Bothrocophias myersi'', Chocoan toadheaded pit viper, Equis red snake * ''

Bothrops ''Bothrops'' is a genus of highly venomous pit vipers endemic to Central and South America.McDiarmid RW, Campbell JA, Touré T. 1999. ''Snake Species of the World: A Taxonomic and Geographic Reference, vol. 1''. Herpetologists' League. 511 pp ...

'', American lanceheads ** '' Bothrops alcatraz'' ** ''

Bothrops alternatus :''Common names'': yarará grande, urutu,Campbell JA, Lamar WW. 2004. ''The Venomous Reptiles of the Western Hemisphere''. Comstock Publishing Associates, Ithaca and London. 870 pp. 1500 plates. . wutu,Brown JH. 1973. ''Toxicology and Pharmacolog ...

'', Urutu ** ''

Bothrops ammodytoides :''Common names: Patagonian lancehead,Campbell JA, Lamar WW. 2004. ''The Venomous Reptiles of the Western Hemisphere''. Comstock Publishing Associates, Ithaca and London. 870 pp. 1500 plates. . yarará ñata,Bothrops asper Terciopelo (''Bothrops asper'') is a species of pit vipers occurring at low to moderate elevations in northeast Mexico and Central America, and into South America where it is known from elevations up to 2600 meters in the Colombian and Ecuado ...

'', Terciopelo/Fer-de-lance ** ''

Bothrops atrox ''Bothrops atrox'' — also known as the common lancehead, ''fer-de-lance'', ''barba amarilla''Campbell JA, Lamar WW. 2004. ''The Venomous Reptiles of the Western Hemisphere''. Comstock Publishing Associates, Ithaca and London. 870 pp. 1500 plate ...

'', Common lancehead ** '' Bothrops barnetti'', Barnett's lancehead ** '' Bothrops bilineatus'', Two-striped forest pit viper *** '' Bothriopsis bilineatus bilineatus'' *** '' Bothrops bilineatus smaragdinus'' ** '' Bothrops brazili'', Brazil's lancehead ** '' Bothrops caribbaeus'', Saint Lucia lancehead ** '' Bothrops cotiara'', Cotiara ** '' Bothrops erythromelas'', Caatinga lancehead ** '' Bothrops fonsecai'', Fonseca's lancehead ** '' Bothrops insularis'', Golden lancehead ** '' Bothrops itapetiningae'', São Paulo lancehead ** '' Bothrops jararaca'', Jararaca ** '' Bothrops jararacussu'', Jararacussu ** '' Bothrops jonathani'', Cochabamba lancehead ** '' Bothrops lanceolatus'', Martinique lancehead ** ''

Bothrops leucurus ''Bothrops leucurus'', commonly known as the whitetail lancehead or the Bahia lancehead,Bothrops lojanus'', Lojan lancehead ** '' Bothrops marajoensis'', Marajó lancehead ** '' Bothrops medusa'', Venezuelan forest pit viper ** '' Bothrops monsignifer'' ** ''

Bothrops moojeni ''Bothrops moojeni'', commonly known in English as the Brazilian lancehead, is a species of venomous snake in the family Viperidae. McDiarmid RW, Campbell JA, Touré TA (1999). ''Snake Species of the World: A Taxonomic and Geographic Reference, ...

'', Brazilian lancehead ** ''

Bothrops muriciensis ''Bothrops'' is a genus of highly venomous pit vipers endemic to Central and South America.McDiarmid RW, Campbell JA, Touré T. 1999. ''Snake Species of the World: A Taxonomic and Geographic Reference, vol. 1''. Herpetologists' League. 511 pp. ...

Bothrops oligobalius ''Bothrops'' is a genus of highly venomous pit vipers endemic to Central and South America.McDiarmid RW, Campbell JA, Touré T. 1999. ''Snake Species of the World: A Taxonomic and Geographic Reference, vol. 1''. Herpetologists' League. 511 pp. ...

'' ** '' Bothrops oligolepis'', Peruvian forest pit viper ** '' Bothrops osbornei'' ** '' Bothrops otavioi'' ** '' Bothrops pictus'', Desert lancehead ** ''

Bothrops pirajai :''Common names: Piraja's lancehead.Campbell JA, Lamar WW (2004). ''The Venomous Reptiles of the Western Hemisphere''. Ithaca and London: Comstock Publishing Associates. 870 pp., 1,500 plates. .'' ''Bothrops pirajai'' is a species of venomous s ...

'', Piraja's lancehead ** '' Bothrops pulcher'', Andean forest pit viper ** '' Bothrops punctatus'', Chocoan lancehead ** '' Bothrops sanctaecrucis'', Bolivian lancehead ** '' Bothrops sazimai'', Franceses Island lancehead ** '' Bothrops sonene'' ** '' Bothrops taeniatus'', Speckled forest pit viper *** '' Bothrops taeniatus lichenosus'' *** '' Bothriopsis taeniatus taeniatus'' ** '' Bothrops venezuelensis'', Venezuelan lancehead * '' Calloselasma'', Malayan ground pit vipers ** '' Calloselasma rhodostoma'', Malayan ground pit viper * '' Cerrophidion'', American mountain pit vipers (montane pit vipers) ** '' Cerrophidion godmani'', Godman's montane pit viper ** '' Cerrophidion petlalcalensis'', Godman's montane pit viper ** '' Cerrophidion sasai'', Costa Rica montane pit viper ** '' Cerrophidion tzotzilorum'', Tzotzil montane pit viper ** '' Cerrophidion wilsoni'', Honduras montane pit viper * ''

'', Common rattlesnakes **'' Crotalus adamanteus'', Eastern diamondback rattlesnake **'' Crotalus angelensis'', Angel de la Guarda Island speckled rattlesnake **'' Crotalus aquilus'', Queretaran dusky rattlesnake **'' Crotalus armstrongi'', Western dusky rattlesnake **''

Crotalus atrox The western diamondback rattlesnake or Texas diamond-backWright AH, Wright AA. (1957). ''Handbook of Snakes''. Comstock Publishing Associates. (7th printing, 1985). . (''Crotalus atrox'') is a rattlesnake species and member of the viper family, ...

'', Western diamondback rattlesnake **''

Crotalus basiliscus ''Crotalus basiliscus'', known as the Mexican west coast rattlesnake,Campbell JA, Lamar WW (2004). ''The Venomous Reptiles of the Western Hemisphere''. Ithaca and London: Comstock Publishing Associates. 870 pp., 1,500 plates. . Mexican green ratt ...

'', Mexican west coast rattlesnake **'' Crotalus campbelli'' **''

Crotalus catalinensis The Santa Catalina rattlesnake (''Crotalus catalinensis'') is a species of pit viper endemic to Isla Santa Catalina in the Gulf of California just off the east coast of the state of Baja California Sur, Mexico. Like all other pit vipers, it is v ...

'', Catalina Island rattlesnake **''

Crotalus cerastes ''Crotalus cerastes'', known as the sidewinder, horned rattlesnake or sidewinder rattlesnake,Wright AH, Wright AA. 1957. Handbook of Snakes. Comstock Publishing Associates. (7th printing, 1985). 1105 pp. . is a Crotalinae, pit viper species belon ...

'', Sidewinder ***'' Crotalus cerastes cerastes'', Mojave desert sidewinder ***'' Crotalus cerastes cercobombus'', Sonoran sidewinder ***'' Crotalus cerastes laterorepens'', Colorado desert sidewinder **'' Crotalus culminatus'', Northwestern neotropical rattlesnake **''

Crotalus durissus ''Crotalus durissus'', known as the South American rattlesnake, tropical rattlesnake,Mehrtens JM. 1987. Living Snakes of the World in Color. New York: Sterling Publishers. 480 pp. and by other names, is a highly venomous pit viper species found ...

'', South American rattlesnake ***'' Crotalus durissus cumanensis'', Venezuelan rattlesnake ***'' Crotalus durissus durissus'', Cascabel rattlesnake ***'' Crotalus durissus marajoensis'', Marajoan rattlesnake ***'' Crotalus durissus maricelae'' ***'' Crotalus durissus ruruima'', Mt. Roraima rattlesnake ***'' Crotalus durissus terrificus'', South American rattlesnake ***''

Crotalus durissus trigonicus ''Crotalus'' is a genus of venomous pit vipers in the family Viperidae, known as rattlesnakes or rattlers. Wright AH, Wright AA (1957). ''Handbook of Snakes of the United States and Canada''. Ithaca and London: Comstock Publishing Associates ( ...

'', Rupunini rattlesnake ***'' Crotalus durissus unicolor'', Aruba Island rattlesnake ***'' Crotalus durissus vegrandis'', Uracoan rattlesnake **'' Crotalus ehecatl'' **'' Crotalus enyo'', Baja rattlesnake ***'' Crotalus enyo cerralvensis'', Cerralvo Island rattlesnake ***'' Crotalus enyo enyo'', Lower California rattlesnake ***'' Crotalus enyo furvus'', Rosario rattlesnake **'' Crotalus ericsmithi'' **''

Crotalus horridus The timber rattlesnake, canebrake rattlesnake, or banded rattlesnake (''Crotalus horridus'')Albert Hazen WWright AH, Anna Allen WWright AA (1957). ''Handbook of Snakes of the United States and Canada''. Ithaca and London: Comstock Publishing A ...

'', Timber rattlesnake **''

Crotalus intermedius ''Crotalus intermedius'' (common name Mexican small-headed rattlesnakeCampbell JA, Lamar WW. 2004. The Venomous Reptiles of the Western Hemisphere. Comstock Publishing Associates, Ithaca and London. 870 pp. 1500 plates. .) is a pit viper species ...

'', Mexican small-headed rattlesnake ***''

Crotalus intermedius gloydi :''Common names: Oaxacan small-headed rattlesnake.'' ''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. Etymology The subspecific ...

'', Oaxacan small-headed rattlesnake ***'' Crotalus intermedius intermedius'', Totalcan small-headed rattlesnake ***''

Crotalus intermedius omiltemanus :''Common names: Omilteman small-headed rattlesnake.Klauber LM. 1997. Rattlesnakes: Their Habitats, Life Histories, and Influence on Mankind. Second Edition. First published in 1956, 1972. University of California Press, Berkeley. .'' ''Crotalus ...

'', Omilteman small-headed rattlesnake **''

Crotalus lannomi ''Crotalus lannomi'', known commonly as the Autlán rattlesnake, is a species of venomous snake, a pit viper in the family Viperidae. The species is endemic to southwestern Mexico. There are no subspecies that are recognized as being valid.Cam ...

'', Autlan rattlesnake **'' Crotalus lepidus'', Rock rattlesnake ***'' Crotalus lepidus klauberi'', Banded rock rattlesnake ***'' Crotalus lepidus lepidus'', Mottled rock rattlesnake ***'' Crotalus lepidus maculosus'', Durango rock rattlesnake **'' Crotalus mictlantecuhtli'' **'' Crotalus mitchellii'', Speckled rattlesnake ***'' Crotalus mitchellii mitchellii'', San Lucan speckled rattlesnake ***'' Crotalus mitchellii muertensis'', El Muerto Island speckled rattlesnake **''

Crotalus molossus The black-tailed rattlesnake (''Crotalus molossus'') is a venomous pit viper species found in the southwestern United States and Mexico. Four subspecies are currently recognized, including the nominate subspecies described here. Taxonomy A recent ...

'', Black-tailed rattlesnake ***'' Crotalus molossus estebanensis'', San Esteban Island black-tailed rattlesnake ***'' Crotalus molossus molossus'', Northern black-tailed rattlesnake ***'' Crotalus molossus nigrescens'', Mexican black-tailed rattlesnake ***'' Crotalus molossus oaxacus'', Oaxacan black-tailed rattlesnake **'' Crotalus morulus'', Tamaulipan rock rattlesnake **''

Crotalus oreganus ''Crotalus oreganus'', commonly known as the (northern) Pacific rattlesnake, Wright AH, Wright AA. 1957. Handbook of Snakes. Comstock Publishing Associates. (7th printing, 1985). 1105 pp. . is a venomous pit viper species found in western North A ...

'', Western rattlesnake ***'' Crotalus oreganus abyssus'', Grand Canyon rattlesnake ***'' Crotalus oreganus caliginis'', Coronado Island rattlesnake ***''

Crotalus oreganus cerberus ''Crotalus cerberus'' is a venomous pit viper species found in the southwestern United States. It is known as the Arizona black rattlesnake, black rattlesnake, and several other common names. Wright AH, Wright AA. 1957. Handbook of Snakes. 2 vol ...

'', Arizona black rattlesnake ***'' Crotalus oreganus concolor'', Midget faded rattlesnake ***''

Crotalus oreganus helleri ''Crotalus helleri'', known as the Southern Pacific rattlesnake, black diamond rattlesnake, Wright AH, Wright AA (1957). ''Handbook of Snakes of the United States and Canada''. Ithaca and London: Comstock Publishing Associates, a division of Corn ...

'', Southern Pacific rattlesnake ***'' Crotalus oreganus lutosus'', Great Basin rattlesnake ***'' Crotalus oreganus oreganus'', Northern Pacific rattlesnake **'' Crotalus ornatus'', Eastern black-tailed rattlesnake **'' Crotalus polisi'' **'' Crotalus polystictus'', Mexican lancehead rattlesnake **''

Crotalus pricei :''Common names: twin-spotted rattlesnake,Campbell JA, Lamar WW (2004). ''The Venomous Reptiles of the Western Hemisphere''. Ithaca and London: Comstock Publishing Associates. 870 pp., 1500 plates. . western twin-spotted rattlesnake, Klauber LM ...

'', Twin-spotted rattlesnake ***'' Crotalus pricei miquihuanus'', Eastern twin-spotted rattlesnake ***'' Crotalus pricei pricei'', Western twin-spotted rattlesnake **'' Crotalus pusillus'', Tancitaran dusky rattlesnake **'' Crotalus pyrrhus'', Southwestern speckled rattlesnake **''

Crotalus ravus ''Crotalus ravus'', commonly known as the Mexican pigmy rattlesnakeKlauber LM. 1997. Rattlesnakes: Their Habitats, Life Histories, and Influence on Mankind. Second Edition. 2 volumes. Reprint, University of California Press, Berkeley. . or Mexica ...

'', Mexican pygmy rattlesnake ***'' Crotalus ravus brunneus'', Oaxacan pygmy rattlesnake ***'' Crotalus ravus exigus'', Guerreran pygmy rattlesnake ***'' Sistrurus ravus ravus'', Central Plateau pygmy rattlesnake **''

Crotalus ruber :''Common names: red diamond rattlesnake, red rattlesnake, red diamond snake,Wright AH, Wright AA. 1957. Handbook of Snakes. Comstock Publishing Associates. (7th printing, 1985). 1105 pp. . #Common names, more'' ''Crotalus ruber'' is a venomous ...

'', Red diamond rattlesnake ***'' Crotalus ruber exsul'', Cedros Island red diamond rattlesnake ***'' Crotalus ruber lorenzoensis'', San Lorenzo Island red diamond rattlesnake ***''

Crotalus ruber lucasensis :''Common names: San Lucan diamond rattlesnake.Klauber LM. 1997. Rattlesnakes: Their Habitats, Life Histories, and Influence on Mankind. Second Edition. 2 volumes. Reprint, University of California Press, Berkeley. .'' ''Crotalus ruber lucasensi ...

'', San Lucan red diamond rattlesnake ***'' Crotalus ruber ruber'', Red diamond rattlesnake **''

Crotalus scutulatus ''Crotalus scutulatus'' (common names: Mojave rattlesnake,Crothier, B.I. ''et al''. 2003. Scientific and standard English names of amphibians and reptiles of North America north of Mexico: Update. ''Herpetological Review'' 34:196–203 Stebbins ...

'', Mojave rattlesnake ***'' Crotalus scutulatus salvini'', Huamantlan rattlesnake ***'' Crotalus scutulatus scutulatus'', Mojave rattlesnake **''

Crotalus simus : ''Common names: Middle American rattlesnake, Central American rattlesnake,''Klauber LM. 1997. Rattlesnakes: Their Habitats, Life Histories, and Influence on Mankind. Second Edition. 2 volumes. Reprint, University of California Press, Berkeley. ...

'', Middle American rattlesnake **''

Crotalus stejnegeri ''Crotalus stejnegeri,'' commonly known as the Sinaloan long-tailed rattlesnake or just long-tailed rattlesnake,Campbell JA, Lamar WW (2004). ''The Venomous Reptiles of the Western Hemisphere''. Ithaca and London: Comstock Publishing Associates. ...

'', Long-tailed rattlesnake **'' Crotalus stephensi'', Panamint rattlesnake **'' Crotalus tancitarensis'' **'' Crotalus thalassoporus'' **'' Crotalus tigris'', Tiger rattlesnake **'' Crotalus tlaloci'' **'' Crotalus tortugensis'', Tortuga Island diamond rattlesnake **'' Crotalus totonacus'', Totonacan rattlesnake **''

Crotalus transversus :''Common names: Cross-banded mountain rattlesnakeCampbell JA, Lamar WW. 2004. The Venomous Reptiles of the Western Hemisphere. Comstock Publishing Associates, Ithaca and London. 870 pp. 1500 plates. .'' ''Crotalus transversus'', or the Cross-ba ...

'', Cross-banded mountain rattlesnake **'' Crotalus triseriatus'', Dusky rattlesnake **'' Crotalus tzabcan'', Yucatán neotropical rattlesnake **''

Crotalus viridis ''Crotalus viridis'' (Common names: prairie rattlesnake, Great Plains rattlesnake, Wright AH, Wright AA. 1957. ''Handbook of Snakes of the United States and Canada''. Ithaca and London: Comstock Publishing Associates. (7th printing, 1985). 1,105 ...

'', Prairie rattlesnake ***''

Crotalus viridis nuntius :''Common names: Hopi rattlesnake,Campbell JA, Lamar WW. 2004. The Venomous Reptiles of the Western Hemisphere. Comstock Publishing Associates, Ithaca and London. 870 pp. 1500 plates. . Arizona prairie rattlesnake, prairie rattlesnake.Wright AH, ...

'', Hopi rattlesnake ***'' Crotalus viridis viridis'', Prairie rattlesnake **''

Crotalus willardi :''Common names: ridge-nosed rattlesnake, Willard's rattlesnake, Willard's rattler Wright AH, Wright AA (1957). ''Handbook of Snakes of the United States and Canada''. Ithaca and London: Comstock Publishing Associates. 1,105 pp. (in 2 volumes). ...

'', Ridge-nosed rattlesnake ***'' Crotalus willardi amabilis'', Del Nido ridge-nosed rattlesnake ***'' Crotalus willardi meridionalis'', Southern ridge-nosed rattlesnake ***'' Crotalus willardi obscurus'', New Mexican ridge-nosed rattlesnake ***'' Crotalus willardi silus'', Western Chihuahuan ridge-nosed rattlesnake ***'' Crotalus willardi willardi'', Arizona ridge-nosed rattlesnake * '' Deinagkistrodon'', Hundred-pace vipers ** '' Deinagkistrodon acutus'', Hundred-pace viper * '' Garthius'' ** '' Garthius chaseni'', Mount Kinabalu pit viper * ''

Gloydius ''Gloydius'' is a genus of venomous pitvipers endemic to Asia, also known as Asian moccasins or Asian ground pit vipers. Named after American herpetologist Howard K. Gloyd,Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). ''The Eponym Dic ...

'' Asian ground pit vipers ** '' Gloydius angusticeps ** ''

Gloydius blomhoffii ''Gloydius blomhoffii'', commonly known as the mamushi,Mehrtens JM (1987). ''Living Snakes of the World in Color''. New York: Sterling Publishers. 480 pp. . Japanese moccasin, Japanese pit viper, Qichun snake, Salmusa or Japanese mamushi,Gumprech ...

'', Japanese mamushi *** '' Gloydius blomhoffii blomhoffii'', Japanese mamushi *** '' Gloydius blomhoffii dubitatus'', Tung Ling mamushi *** '' Gloydius blomhoffii siniticus'', Yangtze mamushi ** '' Gloydius brevicaudus'', Short-tailed mamushi ** '' Gloydius caraganus'', Karaganda pit viper ** '' Gloydius caucasicus'', Caucasian pit viper ** '' Gloydius cognatus'', Alashan pit viper ** '' Gloydius halys'', Siberian pit viper *** '' Gloydius halys boehmei'', Boehme's pit viper *** '' Gloydius halys halys'', Siberian pit viper ** ''

Gloydius himalayanus ''Gloydius himalayanus'' also known as the Himalayan pit viper or Gloyd HK, Conant R. 1990. ''Snakes of the'' Agkistrodon ''Complex: A Monographic Review''. Society for the Study of Amphibians and Reptiles. 614 pp. 52 plates. LCCN 89-50342. . th ...

'', Himalayan pit viper ** '' Gloydius huangi'' ** ''

Gloydius intermedius ''Gloydius intermedius'', or Central Asian pit viper, is a venomous species of pitviper endemic to northern Asia. Three subspecies are currently recognized, including the nominate subspecies described here. Description Gloyd and Conant (1990 ...

'', Central Asian pit viper ** '' Gloydius lijianlii'' ** '' Gloydius liupanensis'' ** '' Gloydius monticola'', Likiang pit viper ** '' Gloydius qinlingensis'' ** '' Gloydius rickmersi'' ** '' Gloydius rubromaculatus'' ** ''

Gloydius saxatilis :''Common names: Amur viper,Mehrtens JM. 1987. ''Living Snakes of the World in Color''. New York: Sterling Publishers. 480 pp. . rock mamushi. Gloyd HK, Conant R. 1990. ''Snakes of the'' Agkistrodon ''Complex: A Monographic Review''. Society for ...

'', Rock mamushi ** '' Gloydius shedaoensis'', Shedao island pit viper ** '' Gloydius stejnegeri'', Gobi pit viper ** '' Gloydius strauchi'', Strauch's pit viper ** '' Gloydius tsushimaensis'' ** '' Gloydius ussuriensis'', Ussuri mamushi * ''

Hypnale :''Common names: hump-nosed vipers,Gloyd HK, Conant R. 1990. Snakes of the Agkistrodon Complex: A Monographic Review. Society for the Study of Amphibians and Reptiles. 614 pp. 52 plates. LCCN 89-50342. . hump-nosed pit vipers.Brown JH. 1973. Toxi ...

'', Humpnosed vipers ** ''

Hypnale hypnale ''Hypnale hypnale'' is a venomous pit viper species endemic to India and Sri Lanka. Common names include the hump-nosed viper,United States Navy (1991). ''Poisonous Snakes of the World''. New York: United States Government/Dover Publications In ...

'', Humpnosed viper ** ''

Hypnale nepa ''Hypnale nepa'', the Sri Lankan hump-nosed viper, Gloyd HK, Conant R. 1990. Snakes of the ''Agkistrodon'' Complex: A Monographic Review. Society for the Study of Amphibians and Reptiles. 614 pp. 52 plates. LCCN 89-50342. . is a venomous pitvipe ...

'', Sri Lankan humpnosed viper ** '' Hypnale zara'', Lowlands humpnosed viper * ''

Lachesis Lachesis ( ; grc, Λάχεσις, Lákhesis, disposer of lots; from , 'to obtain by lot, by fate, or by the will of the gods'), in ancient Greek religion, was the second of the Three Fates, or Moirai; the others were her sisters, Clotho and ...

'', Bushmasters ** '' Lachesis acrochorda'', Chocoan bushmaster ** '' Lachesis melanocephala'', Black-headed bushmaster ** ''

Lachesis muta ''Lachesis muta'', also known as the Southern American bushmaster or Atlantic bushmaster, is a venomous pit viper species found in South America, as well as the island of Trinidad in the Caribbean. Two subspecies are currently recognized, includi ...

'', South American bushmaster *** '' Lachesis muta muta'', South American bushmaster *** '' Lachesis muta rhombeata'', Atlantic forest bushmaster ** '' Lachesis stenophrys'', Central American bushmaster * '' Metlapilcoatlus'', Jumping vipers ** '' Metlapilcoatlus indomitus'' ** '' Metlapilcoatlus mexicanus'', Central American jumping pit viper ** '' Metlapilcoatlus nummifer'', Mexican jumping pit viper ** '' Metlapilcoatlus occiduus'', Guatemalan jumping pit viper ** '' Metlapilcoatlus olmec'', Tuxtlan jumping pit viper * '' Mixcoatlus'', Cloud montane pitvipers ** ''

Mixcoatlus barbouri :''Common names: Barbour's montane pitviper.,Campbell JA, Lamar WW (2004). ''The Venomous Reptiles of the Western Hemisphere''. 2 volumes. Ithaca and London: Comstock Publishing Associates. 870 pp., 1,500 plates. . Barbour's pit viper. Mehrtens ...

'', Barbour's montane pit viper ** ''

Mixcoatlus browni ''Mixcoatlus browni'' (commonly known as Brown's montane pit viper, sometimes Mexican montane pitviper) is a species of pit viper found at high elevations in Guerrero, Mexico. This species was previously placed in the genus ''Agkistrodon'', where ...

'', Mexican montane pit viper ** '' Mixcoatlus melanurus'', Black-tailed horned pit viper * '' Ophryacus'', Mexican horned pit vipers ** '' Ophryacus smaragdinus'', Emerald horned pit viper ** '' Ophryacus sphenophrys'', Broad-horned pit viper ** '' Ophryacus undulatus'', Mexican horned pit viper * ''

Ovophis :''Common names: mountain pit vipers.'' ''Ovophis'' is a genus of venomous snake, venomous Crotalinae, pitvipers found in Asia. Six species are currently recognized. Geographic range Found in Asia in Nepal and Seven Sister States, Seven Sisters ...

'', Asian mountain pit vipers ** ''

Ovophis monticola ''Ovophis monticola'', commonly known as the Chinese mountain pit viper, is a venomous snake, venomous Crotalinae, pitviper species found in Asia. Currently, two subspecies are recognized, including the nominate subspecies described here. Recen ...

'', Mountain pit viper *** ''

Ovophis convictus :''Common names: mountain pit vipers.'' ''Ovophis'' is a genus of venomous pitvipers found in Asia. Six species are currently recognized. Geographic range Found in Asia in Nepal and Seven Sisters (Assam), India, eastward through Myanmar, Cambod ...

'', Indo-Malayan mountain pit viper *** ''

Ovophis makazayazaya :''Common names: mountain pit vipers.'' ''Ovophis'' is a genus of venomous pitvipers found in Asia. Six species are currently recognized. Geographic range Found in Asia in Nepal and Seven Sisters (Assam), India, eastward through Myanmar, Cambod ...

'', Taiwan mountain pit viper *** '' Ovophis monticola monticola'', Mountain pit viper *** '' Ovophis monticola zhaokentangi'', Gaoligong mountain pit viper ** ''

Ovophis okinavensis ''Ovophis okinavensis'', commonly known as the , Ryukyu Island pit viper, and the Okinawan pitviper, is a venomous pitviper species found in the Ryukyu Islands of Japan.Gumprecht A, Tillack F, Orlov NL, Captain A, Ryabov S. 2004. ''Asian Pitviper ...

'', Okinawa pit viper ** '' Ovophis tonkinensis'', Tonkin pit viper ** '' Ovophis zayuensis'', Zayuan mountain pit viper * '' Porthidium'', Hog-nosed pit vipers ** ''

Porthidium arcosae :''Common names: hognose pitvipers.Campbell JA, Lamar WW (2004). ''The Venomous Reptiles of the Western Hemisphere'' Ithaca and London: Comstock Publishing Associates. 870 pp., 1500 plates. .'' ''Porthidium'' is a genus of venomous Crotalinae, ...

'', Manabí hog-nosed pit viper ** '' Porthidium dunni'', Dunn's hog-nosed pit viper ** '' Porthidium hespere'', Colima hog-nosed pitviper ** '' Porthidium lansbergii'', Lansberg's hog-nosed pit viper *** '' Porthidium lansbergii hutmanni'' *** '' Porthidium lansbergii lansbergii'', Lansberg's hog-nosed pit viper *** '' Porthidium lansbergii rozei'' ** ''

Porthidium nasutum :''Common names: hognosed pitviper, hognosed pit viper, rainforest hognosed pitviper,Campbell JA, Lamar WW. 2004. The Venomous Reptiles of the Western Hemisphere. 2 volumes. Comstock Publishing Associates, Ithaca and London. 870 pp. 1500 plates. ...

'', Rainforest hog-nosed pit viper ** '' Porthidium ophryomegas'', Slender hog-nosed pit viper ** '' Porthidium porrasi'' ** '' Porthidium volcanicum'', Ujarran hog-nosed pit viper ** '' Porthidium yucatanicum'', Yucatán hog-nosed pit viper * ''

Protobothrops ''Protobothrops'' is a genus of venomous pit vipers found in Asia.. The venom of ''Protobothrops'' can be diverse and unique across individual organisms of the same and differing species and has demonstrated the ability to evolve in an accelera ...

'' ** ''

Protobothrops cornutus ''Protobothrops cornutus'', commonly known as the horned pit viper or Fan-Si-Pan horned pitviper,Gumprecht A, Tillack F, Orlov NL, Captain A, Ryabov S. 2004. ''Asian Pitvipers''. GeitjeBooks. Berlin. 1st Edition. 368 pp. . is a venomous pit v ...

'' ** '' Protobothrops dabieshanensis'', Dabie Mountains pit viper ** '' Protobothrops elegans'', Elegant pit viper ** ''

Protobothrops flavoviridis ''Protobothrops flavoviridis'' is a species of venomous pit viper endemic to the Ryukyu Islands of Japan. No subspecies are currently recognized. Local common names include habu,Gumprecht A, Tillack F, , Captain A, Ryabov S. 2004. ''Asian Pitvipe ...

'' ** '' Protobothrops himalayanus'' ** '' Protobothrops jerdonii'', Jerdon's pit viper *** '' Protobothrops jerdonii bourreti'', Bourret's pit viper *** '' Protobothrops jerdonii jerdonii'', Jerdon's pit viper *** ''

Protobothrops jerdonii xanthomelas ''Protobothrops jerdonii xanthomelas''Gumprecht A, Tillack F, Orlov NL, Captain A, Ryabov S. 2004. ''Asian Pitvipers''. First Edition. Berlin: GeitjeBooks. 368 pp. . is a venomous pit viper subspecies endemic to China. Description Adults m ...

'', Red-spotted pit viper ** '' Protobothrops kaulbacki'', Kaulback's lance-headed pit viper ** '' Protobothrops kelomohy'', Omkoi lance-headed pitviper ** ''

Protobothrops mangshanensis ''Protobothrops mangshanensis'', commonly known as the Mangshan pit viper, Mangshan pitviper, Mt. Mang pitviper, or Mang Mountain pitviper,Gumprecht A, Tillack F, Orlov NL, Captain A, Ryabov S. 2004. ''Asian Pitvipers''. Geitje Books. Berlin. ...

'', Mangshan pit viper, Mt. Mang pit viper, Mang Mountain pit viper ** '' Protobothrops maolanensis'', Mao-lan pit viper ** ''

Protobothrops mucrosquamatus ''Protobothrops mucrosquamatus'' is a venomous pit viper species endemic to Asia. Common names include: brown-spotted pit viper,Gumprecht A, Tillack F, Orlov NL, Captain A, Ryabov S. 2004. ''Asian Pitvipers''. Geitje Books. Berlin. 1st Edition ...

'', Brown spotted pit viper ** ''

Protobothrops sieversorum ''Protobothrops sieversorum'', commonly known as the three horned-scaled pitviper or the three-horn-scaled pit-viper, is a species of venomous snake, a pit viper in the family Viperidae. The species is endemic to Vietnam. Taxonomy ''Protobothro ...

'', Three horned-scaled pit viper ** ''

Protobothrops tokarensis The Tokara habu (''Protobothrops tokarensis'')Gumprecht A, Tillack F, Orlov NL, Captain A, Ryabov S. 2004. ''Asian Pitvipers''. Geitje Books. Berlin. 1st Edition. 368 pp. . is a venomous pit viper species endemic to the Tokara Islands of Japa ...

'', Tokara habu ** '' Protobothrops trungkhanhensis'', Trungkhanh pit viper ** '' Protobothrops xiangchengensis'', Szechwan pit viper, Kham plateau pit viper * ''

'', Pygmy rattlesnakes **''

Sistrurus catenatus The massasauga (''Sistrurus catenatus'') is a rattlesnake species found in midwestern North America from southern Ontario to northern Mexico and parts of the United States in between. Like all rattlesnakes, it is a pit viper and is venomous. Th ...

'', Massasauga ***''

Sistrurus catenatus catenatus The massasauga (''Sistrurus catenatus'') is a rattlesnake species found in midwestern North America from southern Ontario to northern Mexico and parts of the United States in between. Like all rattlesnakes, it is a pit viper and is venomous. ...

'', Eastern massasauga ***''

Sistrurus tergeminus edwardsii ''Sistrurus tergeminus edwardsii'', also known as the desert massasauga, is a subspecies of venomous pit viper in the family Viperidae. The subspecies is endemic to the Southwestern United States and northern Mexico. In places, its range overlap ...

'', Desert massasauga ***'' Sistrurus tergeminus tergeminus'', Western massasauga **''

Sistrurus miliarius :''Common names: pygmy rattlesnake, eastern pygmy rattlesnake, ground rattlesnake, leaf rattler, death rattler, more.'' Wright AH, Wright AA (1957). ''Handbook of Snakes of the United States and Canada''. Ithaca and London: Comstock Publishing A ...

'', Pygmy rattlesnake ***'' Sistrurus miliarius barbouri'', Dusky pygmy rattlesnake ***'' Sistrurus miliarius miliarius'', Carolina pygmy rattlesnake ***'' Sistrurus miliarius streckeri'', Western pygmy rattlesnake * '' Trimeresurus'', Asian lanceheads (tree pit vipers) ** '' Trimeresurus albolabris'', White-lipped pit viper ** '' Trimeresurus andalasensis'' ** '' Trimeresurus andersoni'', Nicobar mangrove pit viper ** '' Trimeresurus arunachalensis'' ** '' Trimeresurus borneensis'', Bornean pit viper ** '' Trimeresurus brongersmai'', Brongersma's pit viper ** '' Trimeresurus cantori'', Cantor's pit viper ** '' Trimeresurus cardamomensis'' ** '' Trimeresurus erythrurus'', Red-tailed bamboo pit viper ** '' Trimeresurus fasciatus'', Banded pit viper ** '' Trimeresurus flavomaculatus'', Philippine pit viper *** '' Trimeresurus flavomaculatus flavomaculatus'', Philippine pit viper *** '' Trimeresurus flavomaculatus halieus'' ** '' Trimeresurus gracilis'', Kikushi habu ** '' Trimeresurus gramineus'', Bamboo pit viper ** '' Trimeresurus gumprechti'' ** '' Trimeresurus gunaleni'' ** '' Trimeresurus hageni'', Hagen's pit viper ** '' Trimeresurus honsonensis'' ** '' Trimeresurus insularis'', White-lipped island pit viper ** ''

Trimeresurus kanburiensis ''Trimeresurus kanburiensis'' is a species of pit viper found in only a few areas of Thailand. Common names include: Kanburi pitviper,Gumprecht A, Tillack F, Orlov NL, Captain A, Ryabov S. 2004. ''Asian Pitvipers''. GeitjeBooks. Berlin. 1st Edit ...

'', Kanburi pit viper ** ''

Trimeresurus labialis ''Trimeresurus labialis'', commonly called ''Nicobar bamboo pit viper'',Gumprecht A, Tillack F, Orlov NL, Captain A, Ryabov S (2004). ''Asian Pitvipers''. First Edition. Berlin: Geitje Books. 368 pp. . is a venomous pit viper species endemic t ...

'', Nicobar bamboo pit viper ** ''

Trimeresurus macrolepis ''Craspedocephalus macrolepis'', commonly known as the large-scaled pit viper, is a venomous pitviper species endemic to the Southern Western Ghats of South India. Mehrtens JM. 1987. ''Living Snakes of the World in Color''. New York: Sterling ...

'', Large-scaled pit viper ** '' Trimeresurus macrops'', Large-eyed pit viper ** '' Trimeresurus malabaricus'', Malabar rock pit viper ** '' Trimeresurus malcolmi'', Malcolm's pit viper ** '' Trimeresurus mcgregori'', McGregor's pit viper ** '' Trimeresurus medoensis'', Motuo bamboo pit viper ** '' Trimeresurus mutabilis'' ** '' Trimeresurus nebularis'' ** '' Trimeresurus phuketensis'' ** '' Trimeresurus popeiorum'', Pope's bamboo pit viper *** '' Trimeresurus popeiorum barati'', Barat bamboo pit viper *** '' Trimeresurus popeiorum popeiorum'', Pope's bamboo pit viper ** '' Trimeresurus puniceus'', Flat-nosed pit viper ** '' Trimeresurus purpureomaculatus'', Mangrove pit viper ** '' Trimeresurus rubeus'' ** '' Trimeresurus sabahi'', Sabah bamboo pit viper ** '' Trimeresurus salazar'' ** '' Trimeresurus schultzei'', Schultze's pit viper ** ''

Trimeresurus septentrionalis ''Trimeresurus septentrionalis'', commonly known as the Nepal pit viper or northern white-lipped pit viper,Gumprecht A, Tillack F, Orlov NL, Captain A, Ryabov S. 2004. ''Asian Pitvipers''. GeitjeBooks. Berlin. 1st Edition. 368 pp. . is a venom ...

'', Northern white-lipped pit viper ** '' Trimeresurus sichuanensis'' ** '' Trimeresurus stejnegeri'', Stejneger's bamboo pit viper *** '' Trimeresurus stejnegeri chenbihuii'', Chen's bamboo pit viper *** '' Trimeresurus stejnegeri stejnegeri'', Stejneger's bamboo pit viper ** '' Trimeresurus strigatus'', Horseshoe pit viper ** '' Trimeresurus sumatranus'', Sumatran pit viper ** ''

Trimeresurus tibetanus ''Trimeresurus tibetanus'', commonly known as the Tibetan bamboo pit viper,Gumprecht A, Tillack F, Orlov NL, Captain A, Ryabov S. 2004. ''Asian Pit vipers''. First Edition. Berlin: Geitje Books. 368 pp. . is a venomous pit viper species found ...

'', Tibetan bamboo pit viper ** '' Trimeresurus trigonocephalus'', Sri Lankan green pit viper ** '' Trimeresurus truongsonensis'' ** '' Trimeresurus venustus'' ** '' Trimeresurus vogeli'' ** '' Trimeresurus wiroti'' ** '' Trimeresurus yingjiangensis'' ** '' Trimeresurus yunnanensis'', Yunnan bamboo pit viper * '' Tropidolaemus'', Temple pit vipers ** '' Tropidolaemus huttoni'', Hutton's pit viper ** '' Tropidolaemus laticinctus'', Broad-banded temple pit viper ** '' Tropidolaemus subannulatus'', Bornean keeled green pit viper ** ''

Tropidolaemus wagleri ''Tropidolaemus wagleri'', more commonly known as Wagler's pit viper, is a species of venomous snake, a pit viper in the subfamily Crotalinae of the family Viperidae. The species is endemic to Southeast Asia. There are no subspecies that are reco ...

'', Wagler's pit viper

References

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