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.

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References in periodicals archive ?

The biomarker they identified, a steroid compound named 26-methylstigmastane (26-mes), has a unique structure that is currently only known to be synthesized by certain species of modern sponges called demosponges.

Oldest Evidence of Animals

The finding of the additional and novel 26-mes ancient biomarker, which is unique to demosponges, adds extra confidence that both compounds are fossil biomolecules produced by demosponges on an ancient sea floor, researchers said.

Oldest evidence for animal life found in rocks from India

The contractile sponge epithelium sensu lato: Body contraction of the demosponge Tethya wilhelma is mediated by the pinacoderm.

Stolonial Movement: A New Type of Whole-Organism Behavior in Porifera

This material was analyzed by Zea (1987) within a broader assessment of sponges from several areas of the Colombian Caribbean, describing 23 demosponge species for Uraba.

Lista anotada de esponjas (Porifera) de los arrecifes mas meridionales del mar caribe (noroccidente del golfo de Uraba), con la descripcion de nuevos registros para el caribe colombiano

This result is similar to GPCR transcription patterns that have been reported for the demosponge Amphimedon queenslandica, in which many GPCRs were well expressed in pelagic larvae and then downregulated in benthic juveniles (Conaco et al., 2012).

Transcriptomic Basis of Metamorphic Competence in the Salt-Marsh-Dwelling Polychaete Capitella teleta

Schroder H-C, Perovic-Ottstadt S, Rothenberger M, Wiens M, Schwertner H, Batel R, Korzhev M, Muller IM, Muller WEG (2004) Silica transport in the demosponge Suberites domuncula: fluorescence emission analysis using the PDMPO probe and cloning of a potential transporter.

Silicon in live organisms/El silicio en los organismos vivos/O silicio em os organismos vivos

Depth regulation in parenchymella larvae of a demosponge: relative roles of skeletogenesis, biochemical changes and behavior.

Patterns of sponge (Porifera, Demospongiae) distribution in remote, oceanic reef complexes of the Southwestern Caribbean

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.

Effects of biogenic concretions, epibionts, and endobionts on the relative growth of the clam Venus verrucosa in Bizerta Lagoon, Tunisia

The interaction of dermal cells with foreign particles suggests a direct role for these same cells in the movement, internalization, and orientation of sand grains, as described in the keratose demosponge Dysidea etheriade Laubenfels, 1936 (Teragawa, 1986a, b).

Aquaporin in Chondrosia reniformis Nardo, 1847 and its possible role in the interaction between cells and engulfed siliceous particles

Demosponge and sea anemone fibrillar collagen diversity reveals the early emergence of A/C clades and the maintenance of the modular structure of Type V/XI collagens from sponge to human.

Octocoral Sarcophyton auritum Verseveldt & Benayahu, 1978: Microanatomy and presence of collagen fibers

Using the model of the demosponge species Suberites domuncula Olivi, 1792, which expresses aquaporin, cDNA was cloned and the protein was heterologously expressed.

Involvement of aquaporin channels in water extrusion from biosilica during maturation of sponge siliceous spicules

The first integrins to be cloned from early-diverging metazoans were an a integrin subunit from the demosponge Geodia cydonium (Pancer et al., 1997) and [beta] integrin subunits from the demosponge Ophlitaspongia tenuis and the scleractinian coral Acropora millepora (Brower et al., 1997).