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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Rotifera (wheel or whirling animals)
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Class Eurotatoria
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Order Collothecacea
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Family Atrochidae
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Genus Acyclus
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Genus Atrochus
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Genus Cupelopagis
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