Protozoa Goldfuss, 1818 - protozoans
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   Phylum Ciliophora Doflein, 1901 - ciliates
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     Class Oligohymenophorea de Puytorac et al., 1974 - oligohymenophoreans
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       Subclass Peritrichia Stein, 1859
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         Order Peritrichida Stein, 1859 see Subclass Peritrichia Stein, 1859
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