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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 Bivalvia
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Order Nuculoida
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Family Yoldiidae
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Genus Megayoldia
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Species Megayoldia martyria
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Species Megayoldia montereyensis
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Species Megayoldia thraciaeformis
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