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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 Opecoelidae
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Genus Hamacreadium
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Species Hamacreadium angusticollis
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Species Hamacreadium bolivari
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Species Hamacreadium hypentelii
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Species Hamacreadium mutabile
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Species Hamacreadium shawi
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