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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 Neorhabdocoela
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Family Dalyelliidae
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Family Fecampiidae
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Family Graffillidae
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Family Polycystidae
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Family Provorticidae
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Family Pterastericolidae
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Family Typhloplanidae
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Family Umagillidae
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