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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 Gastropoda
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Order Notaspidea
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Family Pleurobranchidae
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Genus Berthella
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Species Berthella agassizii
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Species Berthella californica
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Species Berthella plumula
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Species Berthella sideralis
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Species Berthella stellata
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Species Berthella strongi
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Species Berthella tupala
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