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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 Catenulida
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Family Stenostomidae
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Genus Myostenostomum
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Genus Rhynchoscolex
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Genus Stenostomum
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