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.
References in periodicals archive ?
The demosponge order Verongida includes sponges that are distributed across the globe.
Effects of the duration of larval life on postlarval stages of the demosponge, Sigmadocia caerulea.
It is also likely that shell protrusions (on the posterior side), either by attachment of demosponge or by other epibionts, could disturb the valve opening and impede burrowing, so limiting food capture by the mollusc.
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.
The species so identified included the demosponges Esperiopsis sp.
These include the so-called demosponges that are made mostly of silica-rich needles, or spicules--many of them equipped with hooks and barbs.