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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Class Secernentea
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Order Spirurida
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Superfamily Filarioidea
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Family Aproctidae
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Family Creagrocercidae
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Family Drilonematidae
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Family Filariidae
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Family Homungellidae
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Family Mesidionematidae
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Family Scolecophilidae
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Family Setariidae
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Family Ungellidae
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