Taxon Search
Organism
  Animalia
    Bilateria
     Deuterostomia
      Chordata
        Vertebrata
         Gnathostomata
          Tetrapoda
            Reptilia
                   [Anapsida]
                   [Archosauria]
                   [Diapsida]
                   [Lepidosauria]
                    Squamata
                           [Lacertilia]
                           [Sauria]
                      Serpentes
                        Alethinophidia
                            Viperidae
                              Azemiopinae
                                    Azemiops
                                            Azemiops feae
                              Causinae
                                    Causus
                                            Causus bilineatus
                                            Causus defilippii
                                            Causus lichtensteinii
                                            Causus maculatus
                                            Causus resimus
                                            Causus rhombeatus
                              Crotalinae
                                    Agkistrodon
                                            Agkistrodon bilineatus
                                              Agkistrodon bilineatus bilineatus
                                              Agkistrodon bilineatus howardgloydi
                                              Agkistrodon bilineatus russeolus
                                              Agkistrodon bilineatus taylori
                                            Agkistrodon contortrix
                                              Agkistrodon contortrix contortrix
                                                     [Agkistrodon mokeson austrinus]
                                              Agkistrodon contortrix laticinctus
                                                     [Agkistrodon mokeson laticinctus]
                                              Agkistrodon contortrix mokasen
                                              Agkistrodon contortrix phaeogaster
                                              Agkistrodon contortrix pictigaster
                                                     [Agkistrodon mokeson pictigaster]
                                            Agkistrodon mokeson
                                            Agkistrodon piscivorus
                                                   [Crotalus piscivorus]
                                              Agkistrodon piscivorus conanti
                                              Agkistrodon piscivorus leucostoma
                                              Agkistrodon piscivorus piscivorus
                                            Agkistrodon piscivorus leucostoma (?)
                                    Atropoides
                                            Atropoides nummifer
                                                   [Bothrops nummifer]
                                              Atropoides nummifer mexicanus
                                              Atropoides nummifer nummifer
                                              Atropoides nummifer occiduus
                                            Atropoides olmec
                                            Atropoides picadoi
                                    Bothriechis
                                            Bothriechis aurifer
                                            Bothriechis bicolor
                                            Bothriechis lateralis
                                            Bothriechis marchi
                                            Bothriechis nigroviridis
                                            Bothriechis rowleyi
                                            Bothriechis schlegelii
                                                   [Bothrops schlegelii]
                                    Bothriopsis
                                            Bothriopsis bilineata
                                              Bothriopsis bilineata bilineata
                                              Bothriopsis bilineata smaragdinus
                                            Bothriopsis bilineata smaragdina
                                            Bothriopsis medusa
                                            Bothriopsis oligolepis
                                            Bothriopsis peruviana
                                            Bothriopsis pulchra
                                            Bothriopsis punctata
                                            Bothriopsis taeniata
                                              Bothriopsis taeniata lichenosa
                                              Bothriopsis taeniata taeniata
                                    Bothrops
                                            Bothrops alternatus
                                            Bothrops ammodytoides
                                            Bothrops andianus
                                            Bothrops asper
                                            Bothrops atrox
                                            Bothrops barnetti
                                            Bothrops brazili
                                            Bothrops campbelli
                                            Bothrops caribbaeus
                                            Bothrops colombianus
                                            Bothrops cotiara
                                            Bothrops erythromelas
                                            Bothrops fonsecai
                                            Bothrops hyoprora
                                            Bothrops hyoprorus
                                            Bothrops iglesiasi
                                            Bothrops insularis
                                            Bothrops itapetiningae
                                            Bothrops jararaca
                                            Bothrops jararacussu
                                            Bothrops jonathani
                                            Bothrops lanceolatus
                                            Bothrops leucurus
                                            Bothrops lojanus
                                            Bothrops marajoensis
                                            Bothrops microphthalmus
                                            Bothrops moojeni
                                            Bothrops neuwiedi
                                              Bothrops neuwiedi bolivianus
                                              Bothrops neuwiedi diporus
                                              Bothrops neuwiedi goyazensis
                                              Bothrops neuwiedi lutzi
                                              Bothrops neuwiedi mattogrossensis
                                              Bothrops neuwiedi meridionalis
                                              Bothrops neuwiedi neuwiedi
                                              Bothrops neuwiedi paramanensis
                                              Bothrops neuwiedi pauloensis
                                              Bothrops neuwiedi piauhyensis
                                              Bothrops neuwiedi pubescens
                                              Bothrops neuwiedi urutu
                                            Bothrops pictus
                                            Bothrops pirajai
                                            Bothrops pradoi
                                            Bothrops sanctaecrucis
                                            Bothrops venezuelensis
                                    Calloselasma
                                            Calloselasma rhodostoma
                                    Cerrophidion
                                            Cerrophidion barbouri
                                            Cerrophidion godmani
                                            Cerrophidion tzotzilorum
                                    Crotalus
                                            Crotalus adamanteus
                                            Crotalus aquilus
                                            Crotalus atrox
                                            Crotalus basiliscus
                                            Crotalus catalinensis
                                            Crotalus cerastes
                                              Crotalus cerastes cerastes
                                              Crotalus cerastes cercobombus
                                              Crotalus cerastes laterorepens
                                            Crotalus cerberus
                                            Crotalus concolor
                                            Crotalus confluentus
                                            Crotalus durissus
                                              Crotalus durissus cumanensis
                                              Crotalus durissus durissus
                                                     [Crotalus durissus dryinus]
                                              Crotalus durissus marajoensis
                                              Crotalus durissus maricelae
                                              Crotalus durissus ruruima
                                              Crotalus durissus terrificus
                                                     [Crotalus durissus cascavella]
                                                     [Crotalus durissus collilineatus]
                                              Crotalus durissus trigonicus
                                              Crotalus durissus unicolor
                                                     [Crotalus horridus unicolor]
                                              Crotalus durissus vegrandis
                                              Crotalus durissus culminatus
                                              Crotalus durissus tzabcan
                                            Crotalus enyo
                                              Crotalus enyo cerralvensis
                                              Crotalus enyo enyo
                                              Crotalus enyo furvus
                                            Crotalus helleri
                                            Crotalus horridus
                                                   [Crotalus atricaudatus]
                                                   [Crotalus horridus atricaudatus]
                                                   [Crotalus horridus horridus]
                                              Crotalus horridus atricaudatus
                                            Crotalus intermedius
                                              Crotalus intermedius gloydi
                                              Crotalus intermedius intermedius
                                              Crotalus intermedius omiltemanus
                                            Crotalus lannomi
                                            Crotalus lepidus
                                              Crotalus lepidus klauberi
                                              Crotalus lepidus lepidus
                                              Crotalus lepidus maculosus
                                              Crotalus lepidus morulus
                                            Crotalus maricelae
                                            Crotalus mitchelli
                                            Crotalus mitchellii
                                              Crotalus mitchellii angelensis
                                              Crotalus mitchellii mitchellii
                                              Crotalus mitchellii muertensis
                                              Crotalus mitchellii pyrrhus
                                              Crotalus mitchellii stephensi
                                                     [Crotalus confluentus stephensi]
                                            Crotalus molossus
                                              Crotalus molossus estebanensis
                                              Crotalus molossus molossus
                                              Crotalus molossus nigrescens
                                              Crotalus molossus oaxacus
                                            Crotalus oreganus
                                                   [Crotalus viridis oreganus]
                                              Crotalus oreganus abyssus
                                                     [Crotalus confluentus abyssus]
                                                     [Crotalus viridis abyssus]
                                              Crotalus oreganus caliginis
                                                     [Crotalus viridis caliginis]
                                              Crotalus oreganus cerberus
                                                     [Crotalus viridis cerberus]
                                              Crotalus oreganus concolor
                                                     [Crotalus viridis concolor]
                                              Crotalus oreganus helleri
                                                     [Crotalus viridis helleri]
                                              Crotalus oreganus lutosus
                                                     [Crotalus confluentus lutosus]
                                                     [Crotalus viridis lutosus]
                                              Crotalus oreganus oreganus
                                            Crotalus oreganus herlleri
                                            Crotalus polystictus
                                            Crotalus pricei
                                              Crotalus pricei miquihuanus
                                              Crotalus pricei pricei
                                            Crotalus pusillus
                                            Crotalus ruber
                                                   [Crotalus exsul]
                                              Crotalus ruber lorenzoensis
                                              Crotalus ruber lucasensis
                                              Crotalus ruber ruber
                                                     [Crotalus adamanteus ruber]
                                            Crotalus scutulatus
                                              Crotalus scutulatus salvini
                                              Crotalus scutulatus scutulatus
                                            Crotalus simus
                                              Crotalus simus culminatus
                                                     [Crotalus durissus culminatus]
                                              Crotalus simus simus
                                              Crotalus simus tzabcan
                                                     [Crotalus durissus tzabcan]
                                            Crotalus stejnegeri
                                            Crotalus tergeminus
                                            Crotalus tigris
                                            Crotalus tortugensis
                                            Crotalus totonacus
                                                   [Crotalus durissus totonacus]
                                            Crotalus transversus
                                            Crotalus triseriatus
                                              Crotalus triseriatus armstrongi
                                              Crotalus triseriatus triseriatus
                                            Crotalus triseriatus aquilus
                                            Crotalus unicolor
                                            Crotalus urutu
                                            Crotalus viridis
                                              Crotalus viridis nuntius
                                                     [Crotalus confluentus nuntius]
                                              Crotalus viridis viridis
                                              Crotalus viridis abyssus
                                              Crotalus viridis lutosus
                                              Crotalus viridis oreganus
                                            Crotalus willardi
                                              Crotalus willardi amabilis
                                              Crotalus willardi meridionalis
                                              Crotalus willardi obscurus
                                              Crotalus willardi silus
                                              Crotalus willardi willardi
                                    Deinagkistrodon
                                            Deinagkistrodon acutus
                                    Gloydius
                                            Gloydius blomhoffi
                                            Gloydius blomhoffi blomhoffi
                                            Gloydius blomhoffii
                                              Gloydius blomhoffii blomhoffii
                                              Gloydius blomhoffii brevicaudus
                                              Gloydius blomhoffii dubitatus
                                              Gloydius blomhoffii siniticus
                                            Gloydius halys
                                              Gloydius halys boehmei
                                              Gloydius halys caraganus
                                              Gloydius halys cognatus
                                              Gloydius halys halys
                                              Gloydius halys mogoi
                                            Gloydius himalayanus
                                            Gloydius intermedius
                                              Gloydius intermedius caucasicus
                                              Gloydius intermedius intermedius
                                              Gloydius intermedius stejnegeri
                                            Gloydius monticola
                                            Gloydius saxatilis
                                            Gloydius shedaoensis
                                            Gloydius strauchi
                                            Gloydius ussuriensis
                                    Hypnale
                                            Hypnale hypnale
                                            Hypnale nepa
                                            Hypnale walli
                                    Lachesis
                                            Lachesis melanocephala
                                            Lachesis muta
                                              Lachesis muta muta
                                              Lachesis muta rhombeata
                                            Lachesis stenophrys
                                    Ophryacus
                                            Ophryacus melanurus
                                                   [Porthidium melanurum]
                                            Ophryacus undulatus
                                    Ovophis
                                            Ovophis chaseni
                                            Ovophis monticola
                                              Ovophis monticola convictus
                                              Ovophis monticola makazayazaya
                                              Ovophis monticola monticola
                                              Ovophis monticola zayuensis
                                              Ovophis monticola zhaokentangi
                                            Ovophis okinavensis
                                    Porthidium
                                            Porthidium dunni
                                            Porthidium hespere
                                            Porthidium lansbergii
                                              Porthidium lansbergii arcosae
                                              Porthidium lansbergii hutmanni
                                              Porthidium lansbergii lansbergii
                                              Porthidium lansbergii rozei
                                            Porthidium nasutum
                                                   [Bothrops nasutus]
                                            Porthidium nummifer
                                            Porthidium ophryomegas
                                                   [Bothrops ophryomegas]
                                            Porthidium volcanicum
                                            Porthidium yucatanicum
                                    Sistrurus
                                            Sistrurus catenatus
                                              Sistrurus catenatus catenatus
                                              Sistrurus catenatus edwardsii
                                              Sistrurus catenatus tergeminus
                                            Sistrurus miliarius
                                                   [Crotalus miliarius]
                                              Sistrurus miliarius barbouri
                                              Sistrurus miliarius miliarius
                                              Sistrurus miliarius streckeri
                                            Sistrurus ravus
                                              Sistrurus ravus brunneus
                                              Sistrurus ravus exiguus
                                              Sistrurus ravus ravus
                                    Trimeresurus
                                            Trimeresurus albolabris
                                              Trimeresurus albolabris albolabris
                                              Trimeresurus albolabris insularis
                                              Trimeresurus albolabris septentrionalis
                                            Trimeresurus borneensis
                                            Trimeresurus brongersmai
                                            Trimeresurus cantori
                                            Trimeresurus cornutus
                                            Trimeresurus elegans
                                            Trimeresurus erythrurus
                                            Trimeresurus fasciatus
                                            Trimeresurus flavomaculatus
                                              Trimeresurus flavomaculatus flavomaculatus
                                              Trimeresurus flavomaculatus halieus
                                              Trimeresurus flavomaculatus mcgregori
                                            Trimeresurus flavoviridis
                                            Trimeresurus gracilis
                                            Trimeresurus gramineus
                                            Trimeresurus hageni
                                            Trimeresurus jerdonii
                                              Trimeresurus jerdonii bourreti
                                              Trimeresurus jerdonii jerdonii
                                              Trimeresurus jerdonii xanthomelas
                                            Trimeresurus kanburiensis
                                            Trimeresurus karanshahi
                                            Trimeresurus kaulbacki
                                            Trimeresurus labialis
                                            Trimeresurus macrolepis
                                            Trimeresurus macrops
                                            Trimeresurus malabaricus
                                            Trimeresurus mangshanensis
                                            Trimeresurus medoensis
                                            Trimeresurus mucrosquamatus
                                            Trimeresurus popeorum
                                              Trimeresurus popeorum barati
                                              Trimeresurus popeorum popeorum
                                              Trimeresurus popeorum sabahi
                                            Trimeresurus puniceus
                                            Trimeresurus purpureomaculatus
                                              Trimeresurus purpureomaculatus andersoni
                                              Trimeresurus purpureomaculatus purpureomaculatus
                                            Trimeresurus schultzei
                                            Trimeresurus stejnegeri
                                              Trimeresurus stejnegeri chenbihuii
                                              Trimeresurus stejnegeri stejnegeri
                                              Trimeresurus stejnegeri yunnanensis
                                            Trimeresurus strigatus
                                            Trimeresurus sumatranus
                                              Trimeresurus sumatranus malcolmi
                                              Trimeresurus sumatranus sumatranus
                                            Trimeresurus tibetanus
                                            Trimeresurus tokarensis
                                            Trimeresurus trigonocephalus
                                            Trimeresurus xiangchengensis
                                    Tropidolaemus
                                            Tropidolaemus huttoni
                                            Tropidolaemus wagleri
                                            Tropidolaemus wagleri subannulatus
                              Viperinae
                                    Adenorhinos
                                            Adenorhinos barbouri
                                    Atheris
                                            Atheris anisolepis
                                            Atheris ceratophora
                                            Atheris chlorechis
                                            Atheris desaixi
                                            Atheris hispida
                                            Atheris katangensis
                                            Atheris nitschei
                                              Atheris nitschei nitschei
                                              Atheris nitschei rungwensis
                                            Atheris squamigera
                                    Bitis
                                            Bitis arietans
                                              Bitis arietans arietans
                                              Bitis arietans somalica
                                            Bitis atropos
                                            Bitis caudalis
                                            Bitis cornuta
                                              Bitis cornuta albanica
                                              Bitis cornuta cornuta
                                            Bitis gabonica
                                              Bitis gabonica gabonica
                                              Bitis gabonica rhinoceros
                                            Bitis heraldica
                                            Bitis inornata
                                            Bitis nasicornis
                                            Bitis parviocula
                                            Bitis peringueyi
                                            Bitis rubida
                                            Bitis schneideri
                                            Bitis worthingtoni
                                            Bitis xeropaga
                                    Cerastes
                                            Cerastes cerastes
                                            Cerastes gasperettii
                                            Cerastes vipera
                                    Daboia
                                            Daboia russelii
                                                   [Vipera russellii]
                                              Daboia russelii russelii
                                              Daboia russelii siamensis
                                    Echis
                                            Echis carinatus
                                              Echis carinatus astolae
                                              Echis carinatus carinatus
                                              Echis carinatus multisquamatus
                                              Echis carinatus sinhaleyus
                                              Echis carinatus sochureki
                                            Echis coloratus
                                            Echis hughesi
                                            Echis jogeri
                                            Echis leucogaster
                                            Echis megalocephalus
                                            Echis ocellatus
                                            Echis pyramidum
                                              Echis pyramidum aliaborri
                                              Echis pyramidum leakeyi
                                              Echis pyramidum pyramidum
                                    Eristicophis
                                            Eristicophis macmahonii
                                    Macrovipera
                                            Macrovipera deserti
                                            Macrovipera lebetina
                                              Macrovipera lebetina cernovi
                                              Macrovipera lebetina lebetina
                                              Macrovipera lebetina obtusa
                                              Macrovipera lebetina transmediterranea
                                              Macrovipera lebetina turanica
                                            Macrovipera mauritanica
                                            Macrovipera schweizeri
                                    Montatheris
                                            Montatheris hindii
                                    Proatheris
                                            Proatheris superciliaris
                                    Pseudocerastes
                                            Pseudocerastes persicus
                                              Pseudocerastes persicus fieldi
                                              Pseudocerastes persicus persicus
                                    Vipera
                                            Vipera albicornuta
                                            Vipera albizona
                                            Vipera ammodytes
                                              Vipera ammodytes ammodytes
                                              Vipera ammodytes gregorwallneri
                                              Vipera ammodytes meridionalis
                                              Vipera ammodytes montandoni
                                                     [Vipera aspis balcanica]
                                              Vipera ammodytes transcaucasiana
                                            Vipera aspis
                                              Vipera aspis aspis
                                              Vipera aspis atra
                                              Vipera aspis francisciredi
                                              Vipera aspis hugyi
                                              Vipera aspis zinnikeri
                                            Vipera barani
                                            Vipera berus
                                              Vipera berus berus
                                              Vipera berus bosniensis
                                              Vipera berus sachalinensis
                                            Vipera bornmuelleri
                                                   [Vipera xanthina bornmuelleri]
                                            Vipera bulgardaghica
                                            Vipera darevskii
                                            Vipera dinniki
                                            Vipera kaznakovi
                                            Vipera latastei
                                              Vipera latastei gaditana
                                              Vipera latastei latastei
                                            Vipera latifii
                                            Vipera lotievi
                                            Vipera monticola
                                            Vipera nikolskii
                                            Vipera palaestinae
                                            Vipera pontica
                                            Vipera raddei
                                            Vipera seoanei
                                              Vipera seoanei cantabrica
                                              Vipera seoanei seoanei
                                            Vipera ursinii
                                            Vipera wagneri
                                            Vipera xanthina
                                                   [Vipera xanthina xanthina]