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)
Crotalus (genus)
[hide inferior taxa]
Crotalus adamanteus (species)
Crotalus atrox (species)
Crotalus basilicus (species)
Crotalus cerastes (species)
Crotalus durissus (species)
Crotalus horridus (species)
Crotalus molossus (species)
Crotalus ruber (species)
Crotalus scutulatus (species)
Crotalus sp. (species)
Crotalus viridis (species)