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Demospongiae |
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Demospongiae [dem·ə′spən·jē‚ē] (invertebrate zoology) A class of the phylum Porifera, including sponges with a skeleton of one-to four-rayed siliceous spicules, or of spongin fibers, or both. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Two species of hexactinosidan sponges, Aphrocallistes vastus and Heterochone calyx, build a framework of densely packed sponge skeletons while several other species of hexactinellida and demosponges are accessory fauna. These include the so-called demosponges that are made mostly of silica-rich needles, or spicules--many of them equipped with hooks and barbs. |
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