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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 Strigeata
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Family Gymnophallidae
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Genus Gymnophallus
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Genus Lacunovermis
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Genus Meiogymnophallus
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Genus Paragymnophallus
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Genus Parvatrema
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Genus Pseudogymnophalus
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