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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Annelida (segmented worms)
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Class Clitellata
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Order Acanthobdellida
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Order Arhynchobdellida
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Order Branchiobdellida
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Order Euhirudinea
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Order Haplotaxida
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Order Lumbriculida
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Order Opisthopora
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Order Rhynchobdellida
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