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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 Anarthroclada
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Genus Antennella
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Genus Antennellopsis
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Genus Astrolabia
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Genus Calvinia
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Genus Corhiza
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Genus Gattya
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Genus Halopteris
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Genus Monostaechas
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Genus Nuditheca
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Genus Pentatheca
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Genus Schizotricha
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