the root (no rank)
Eukaryota (domain)
Metazoa (kingdom)
Chordata (phylum)
Craniata (subphylum)
Vertebrata (no rank)
Gnathostomata (superclass)
Sarcopterygii (class)
Tetrapoda (no rank)
Amniota (no rank)
Sauropsida (no rank)
Sauria (no rank)
Lepidosauria (superorder)
Squamata (order)
Serpentes (suborder)
Colubroidea (superfamily)
Viperidae (family)
Crotalinae (subfamily)
pit viper (common name)
pit vipers (common name)
[hide inferior taxa]
Agkistrodon (genus)
Bothriechis schlegelii (species)
Bothrops (genus)
Calloselasma rhodostoma (species)
Cerrophidion godmani (species)
Crotalus (genus)
Deinagkistrodon acutus (species)
Dinodon (genus)
Gloydius (genus)
Lachesis (genus)
Protobothrops (genus)
Sistrurus (genus)
Trimeresurus (genus)