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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 Turbellaria
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Order Prolecithophora
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Family Baicalarctiidae
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Family Bothrioplanidae
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Family Cylindrostomidae
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Family Multipeniatidae
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Family Protomonotresidae
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Family Pseudostomidae
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