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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 Polychaeta
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Order Not assigned
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Family Maldanidae
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Genus Petaloproctus
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Species Petaloproctus neoborealis
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Species Petaloproctus socialis
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Species Petaloproctus tenuis
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Species Petaloproctus terricolus
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