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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Deuterostomia (deuterostomes)
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Craniata (craniates)
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Euteleostomi (bony vertebrates)
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Tetrapoda (tetrapods)
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Amniota (amniotes)
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Order Squamata
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Family Viperidae
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Genus Adenorhinos
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Genus Agkistrodon
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Genus Atheris
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Genus Atropoides
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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
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Genus Causus
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Genus Cerastes
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Genus Cerrophidion
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Genus Crotalus
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Genus Cryptelytrops
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Genus Daboia
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Genus Deinagkistrodon
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Genus Echis
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Genus Eristicophis
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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
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Genus Ophryacus
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Genus Ovophis
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Genus Parias
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Genus Popeia
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Genus Porthidium
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Genus Proatheris
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Genus Protobothrops
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Genus Pseudocerastes
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Genus Sistrurus
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Genus Triceratolepidophis
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Genus Trimeresurus
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Genus Tropidolaemus
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Genus Vipera
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Genus Viridovipera
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Genus Zhaoermia
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