Porifera — A grand division of the Invertebrata, including the sponges; -- called also Spongiae, Spongida, and Spongiozoa. The principal divisions are Calcispongiae, Keratosa or Fibrospongiae, and Silicea.
These Also : Calcispongiae; Poriferan; Poriferata; Silicoidea; Sponge; Spongiae;
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