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Porifera (sponges)
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Class Hexactinellida
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Order Lyssacinosida
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Family Rossellidae
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Genus Hyalascus
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Species Hyalascus attenuatus
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Species Hyalascus baculifer
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Species Hyalascus giganteus
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Species Hyalascus hodgsoni
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Species Hyalascus sagamiensis
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Species Hyalascus similis
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Species Hyalascus stellatus
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