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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 Plagiorchiida
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Family Lepocreadiidae
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Genus Opechona
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Species Opechona alaskensis
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Species Opechona bacillaris
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Species Opechona menidiae
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Species Opechona occidentalis
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Species Opechona olssoni
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Species Opechona orientalis
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Species Opechona parvasoma
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Species Opechona theragrae
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