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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 Monopisthocotylea
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Family Acanthocotylidae
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Family Bothitrematidae
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Family Calceostomatidae
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Family Capsalidae
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Family Dactylogyridae
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Family Dionchidae
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Family Diplectanidae
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Family Gyrodactylidae
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Family Loimoidae
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Family Microbothriidae
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Family Monocotylidae
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Family Tetraonchidae
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Family Udonellidae
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