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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 Allassogonoporidae
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Family Allocreadiidae
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Family Auridistomidae
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Family Batrachotrematidae
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Family Brachycoeliidae
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Family Calycodidae
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Family Cephalogonimidae
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Family Cephaloporidae
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Family Collyriclidae
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Family Deropristiidae
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Family Dicrocoeliidae
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Family Eucotylidae
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Family Gorgocephalidae
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Family Gorgoderidae
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Family Haematoloechidae
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Family Homalometridae
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Family Laterotrematidae
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Family Lecithodendriidae
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Family Lepocreadiidae
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Family Lissorchiidae
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Family Macroderoididae
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Family Maseniidae
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Family Mesocoeliidae
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Family Microphallidae
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Family Monorchiidae
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Family Nanophyetidae
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Family Ochetosomatidae
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Family Omphalometridae
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Family Opecoelidae
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Family Opisthogonimidae
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Family Opistholebetidae
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Family Pachypsolidae
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Family Paragonimidae
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Family Plagiorchiidae
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Family Pleorchiidae
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Family Pleurogenidae
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Family Prosthogonimidae
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Family Renicolidae
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Family Rhytidodidae
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Family Steganodermatidae
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Family Stomylotrematidae
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Family Telorchiidae
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Family Troglotrematidae
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Family Zoogonidae
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