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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Arthropoda (arthropods)
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Chelicerata (spiders, mites, scorpions, and relatives)
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Class Arachnida
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Order Not assigned
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Family Ammotrechidae
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Family Buthidae
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Family Ceromidae
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Family Chactidae
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Superfamily Charinoidea
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Superfamily Charontoidea
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Superfamily Cheiridioidea
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Superfamily Cheliferoidea
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Superfamily Chthonioidea
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Family Daesiidae
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Family Eremobatidae
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Superfamily Eukoenenioidea
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Family Euscorpiidae
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Superfamily Feaelloidea
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Family Galeodidae
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Superfamily Garypoidea
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Family Gylippidae
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Family Heteroscorpionidae
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Family Hexisopodidae
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Superfamily Hubbardioidea
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Family Karschiidae
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Family Melanoblossiidae
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Family Mummuciidae
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Superfamily Neobisioidea
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Family Paracharontidae
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Family Phalangodidae
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Superfamily Phrynoidea
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Family Pseudochactidae
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Family Rhagodidae
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Superfamily Ricinoidoidea
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Family Scorpionidae
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Family Solpugidae
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Superfamily Sternophoroidea
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Superfamily Thelyphonoidea
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