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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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Genus Pseudacanthocotyla
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Species Pseudacanthocotyla pacifica
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Species Pseudacanthocotyla williamsi
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