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)
Agkistrodon (genus)
[hide inferior taxa]
Agkistrodon acutus (species)
Agkistrodon bilineatus (species)
Agkistrodon blomhoffi (species)
Agkistrodon caliginosus (species)
Agkistrodon contortrix (species)
Agkistrodon halys (species)
Agkistrodon piscivorus (species)
Agkistrodon rhodostoma (species)
Agkistrodon sp. (species)
Agkistrodon ussuriensis (species)