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Eumetazoa (metazoans)
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Bilateria (bilaterally symmetrical animals)
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Deuterostomia (deuterostomes)
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Echinodermata (sea stars, sea urchins, sea cucumbers, and relatives)
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Class Crinoidea
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Order Isocrinida
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Family Pentacrinitidae
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Genus Metacrinus
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Species Metacrinus levii
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Species Metacrinus nodosus
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Species Metacrinus wyvilli
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