Phylum Porifera Grant, 1836 - sponges
Count: -
   Class †Archaeocyatha Bornemann, 1884
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   Class Calcarea Bowerbank, 1864 - calcareous sponges
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   Class †Cribricyatha
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   Class Demospongiae Sollas, 1885 - demosponges
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   Class †Heteractinida de Laubenfels, 1955
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   ?Class †Radiocyatha Debrenne, Termier & Termier, 1970
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   Class †Stromatoporoidea Nicholson & Murie, 1878
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