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Eumetazoa (metazoans)
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Class Hydrozoa
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Order Anthoathecata
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Family Hydractiniidae
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Genus Clava
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Genus Clavactinia
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Genus Cnidostoma
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Genus Cystactinia
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Genus Hydractinia
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Genus Hydrocorella
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Genus Janaria
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Genus Kinetocodium
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Genus Rhizogeton
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Genus Rhysia
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Genus Tregoubovia
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