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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 Azygiida
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Family Ptychogonimidae
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Genus Ptychogonimus
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Species Ptychogonimus fontanus
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Species Ptychogonimus megastomus
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