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Eumetazoa (metazoans)
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Class Hydrozoa
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Order Trachymedusae
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Family Rhopalonematidae
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Genus Aglantha
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Genus Aglaura
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Genus Amphogona
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Genus Arctapodema
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Genus Benthocodon
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Genus Colobonema
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Genus Crossota
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Genus Homoeonema
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Genus Pantachogon
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Genus Persa
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Genus Ransonia
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Genus Rhopalonema
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Genus Sminthea
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Genus Stauraglaura
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Genus Tetrorchis
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Genus Vampyrocrossota
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Genus Voragonema
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