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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Mollusca (clams, snails, squids, and relatives)
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Class Monoplacophora
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Order Tryblidiida
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Family Laevipilinidae
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Family Micropilinidae
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Family Monoplacophoridae
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Family Neopilinidae
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