Demosponges (Demospongiae) are the most diverse class in the phylum Porifera. They include greater than 90% of all species of sponges with nearly 8,800 species worldwide (World Porifera Database). [5] .

Demospongiae represents the dominant class of living sponges, representing more than 90% of all those alive today. Few demosponges have hard skeletons, leaving behind a sparse fossil record compared to other classes. The clade is, however, …

Demo­spon­gians can range in size from a few mil­lime­ters to over 2 me­ters in largest di­men­sion. They can form thin en­crus­ta­tions, lumps, fin­ger-like growths, or urn shapes. Pig­ment gran­ules in amoe­bo­cytes often make mem­bers of this class brightly col­ored, in­clud­ing bright yel­low, or­ange, red, pur­ple, or green.

The demosponges originated in the Cambrian period and form the largest class of the phylum Porifera, containing about 85% of all described Holocene species. The class Demospongiae is divided into three subclasses: Subclass Homoscleromorpha, with one order, Homosclerophorida; one family; and about 60 species.

Demosponges (Demospongiae) are the most diverse class in the phylum Porifera. They include greater than 90% of all species of sponges with nearly 8,800 species worldwide (World Porifera Database). They are sponges with a soft body that covers a hard, often massive skeleton made of calcium carbonate, either aragonite or calcite.

Demosponges are by far the most diverse group of Porifera, comprising about 85% of all extant sponge species.

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.

Marine sponges, in particular those belonging to the class of Demospongiae, have been considered among the most interesting invertebrates for their biotechnological potential.

The Demospongiae is the largest Class in the Sponge Phylum (Porifera), it contains over 90% of living sponges, and nearly all the larger species. They can be found at all depths in both fresh and salt water. The skeleton can be siliceous, spongin, or both. The spicules are either simple or four-rayed. All have the leuconoid canal system.

2024年10月9日 · Demospongiae is the most diverse class in the phylum Porifera. In fact, the demosponges include 81% 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, or both.