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Zoothamniidae
Family, Protozoan, Marine
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Warnowiaceae
Family, Protozoan, Marine
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Vorticellidae
Family, Protozoan
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Vaginicolidae
Family, Protozoan, Freshwater, marine
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Stentoridae
Family, Protozoan
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Spiromonadaceae
Family, Protozoan
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Spirofilidae
Family, Protozoan, Freshwater, marine
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Pyrophacaceae
Family, Protozoan, Marine
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Pyrocystaceae
Family, Protozoan, Marine
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Ptychodiscaceae
Family, Protozoan, Marine