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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Protostomia (protostomes)
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Arthropoda (arthropods)
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Crustacea (shrimps, crabs, lobsters, water fleas, and relatives)
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Class Maxillopoda
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Order Sessilia
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Superfamily Chthamaloidea
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Family Chthamalidae
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Genus Chthamalus
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Species Chthamalus fissus
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