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en.wikipedia.org/wiki/Demosponge

Demospongiae is the most diverse class in the phylum Porifera. They include 90 % of all species of sponges with nearly 7,000 species worldwide (World Porifera Database). They are predominantly leuconoid in structure. Their "skeletons" are made of spicules consisting of fibers of the protein spongin, the mineral silica, ...

simple.wikipedia.org/wiki/Demosponge

The Demospongiae are the largest class in the phylum Porifera. Their skeletons are made of spicules consisting of fibers of the protein spongin, the mineral silica, or both. Where spicules of silica are present, they have a different shape from those in the otherwise similar glass sponges. This short article about biology can be ...

www.ucmp.berkeley.edu/porifera/demospongia.html

The Demospongia is by far the most diverse sponge group. Greater than 90 percent of the 5,000 known living sponge species are demosponges. This ratio is not maintained in the fossil record, where less than half of the known genera and families are demosponges. However, the vast majority of living demosponges do not ...

creationwiki.org/Demosponge

Nov 26, 2012 ... Demospongiae is a class of freshwater and marine sponges that belongs to the phylum Porifera. More than 90% of the 5,000 species of sponges are demosponges, making this class of sponge by far the biggest. These sponges are soft but tough and brightly colored, coming in different shapes, sizes, and ...

animaldiversity.org/accounts/Demospongiae

Class Demospongiae includes approximately 4,750 species in 10 orders. Their geographic distribution in the marine environment is from the intertidal to the abyssal zone; some species inhabit freshwater. Members of the Demospongiae are asymmetrical. Demospongians can range in size from a few millimeters to over 2 ...

www.encyclopedia.com/plants-and-animals/animals/zoology-invertebrates/demosponges

Get information, facts, and pictures about Demosponges at Encyclopedia.com. Make research projects and school reports about Demosponges easy with credible articles from our FREE, online encyclopedia and dictionary.

en.wiktionary.org/wiki/demosponge

English[edit]. Noun[edit]. demosponge (plural demosponges). (zoology) Any sponge of the class Demospongiae. Retrieved from "https://en.wiktionary.org/w/ index.php?title=demosponge&oldid=39316361". Categories: English lemmas · English nouns · English countable nouns · en:Zoology · en:Sponges ...

www.nature.com/articles/s41598-017-05604-6

Jul 13, 2017 ... The two major extant groups of siliceous sponges, Demospongiae and Hexactinellida, are generally regarded as sister groups forming the clade Silicea, although the nature of their last common ancestor is uncertain. The fossil record contains a diverse range of basal demosponges that appear to have ...

link.springer.com/chapter/10.1007%2F978-3-642-55486-5_7

Demosponges are the most widespread class of the phylum Porifera. They secrete siliceous (spicules) and proteinaceous (fibers) elements, which constitute the skeleton that shapes the sponge growth and allow cell organization and establishment of the aquiferous system through which the surrounding water accesses the ...