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)
[hide inferior taxa]
Azemiops feae (species)
Causus rhombeatus (species)
Crotalinae (subfamily)
Ovophis okinavensis (species)
Viperinae (subfamily)
Viridovipera stejnegeri (species)
Zhaoermia mangshanensis (species)