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Eumetazoa (metazoans)
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Class Hydrozoa
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Order Leptothecata
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Family Halopterididae
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Genus Monostaechas
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Species Monostaechas faurei
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Species Monostaechas fisheri
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Species Monostaechas natalensis
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Species Monostaechas quadridens
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Species Monostaechas sibogae
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