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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Arthropoda (arthropods)
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Crustacea (shrimps, crabs, lobsters, water fleas, and relatives)
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Class Maxillopoda
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Order Harpacticoida
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Family Aegisthidae
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Family Ambunguipedidae
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Family Ameiridae
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Family Ancorabolidae
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Family Argestidae
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Family Balaenophilidae
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Family Cancrincolidae
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Family Canthocamptidae
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Family Canuellidae
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Family Cerviniidae
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Family Cletodidae
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Family Clytemnestridae
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Family Cylindropsyllidae
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Family Darcythompsoniidae
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Family Diosaccidae
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Family Ectinosomatidae
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Family Euterpinidae
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Family Harpacticidae
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Family Huntemanniidae
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Family Laophontidae
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Family Laophontopsidae
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Family Leptastacidae
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Family Leptopontiidae
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Family Longipediidae
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Family Louriniidae
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Family Metidae
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Family Miraciidae
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Family Neobradyidae
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Family Normanellidae
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Family Not assigned
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Family Orthopsyllidae
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Family Paramesochridae
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Family Parastenheliidae
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Family Parastenocarididae
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Family Peltidiidae
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Family Phyllognathopodidae
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Family Porcellidiidae
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Family Pseudotachidiidae
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Family Rhizothricidae
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Family Tachidiidae
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Family Tegastidae
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Family Tetragonicipitidae
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Family Thalestridae
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Family Thompsonulidae
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Family Tisbidae
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