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Kingdom Animalia (animals)
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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Deuterostomia (deuterostomes)
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Phylum Chordata (chordates)
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Craniata (craniates)
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Subphylum Vertebrata (vertebrates)
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Superclass Gnathostomata (jawed vertebrates)
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Euteleostomi (bony vertebrates)
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Class Sarcopterygii (lobe-finned fishes and terrestrial vertebrates)
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Tetrapoda (tetrapods)
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Amniota (amniotes)
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Class Reptilia
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Order Squamata
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Family Viperidae
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Genus Adenorhinos -
Genus Agkistrodon
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Genus Atheris
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Genus Atropoides -
Genus Azemiops
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Genus Bitis
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Genus Bothriechis
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Genus Bothriopsis
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Genus Bothrocophias
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Genus Bothrops
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Genus Calloselasma -
Genus Causus
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Genus Cerastes
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Genus Cerrophidion -
Genus Crotalus
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Genus Cryptelytrops -
Genus Daboia
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Genus Deinagkistrodon
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Genus Echis
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Genus Eristicophis -
Genus Gloydius
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Genus Hypnale
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Genus Lachesis
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Genus Macrovipera
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Genus Montatheris -



Genus Ophryacus -



Genus Ovophis -



Genus Parias -



Genus Popeia -
Genus Porthidium
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Genus Proatheris -



Genus Protobothrops -



Genus Pseudocerastes -
Genus Sistrurus
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Genus Triceratolepidophis -



Genus Trimeresurus -



Genus Tropidolaemus -
Genus Vipera
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Genus Viridovipera -



Genus Zhaoermia
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Confused by a class within a class or an order within an order? Please see our brief essay.
Scientific names for Aves taxonomy (family and below) are from The Howard and Moore Complete Checklist of the Birds of the World, Princeton University Press, copyright 2003. Used by permission.



