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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Platyhelminthes (flatworms)
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Class Trematoda
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Order Opisthorchiida
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Family Acanthocolpidae
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Family Acanthostomatidae
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Family Campulidae
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Family Cryptogonimidae
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Family Heterophyidae
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Family Nasitrematidae
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Family Opisthorchiidae
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Family Pachytrematidae
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