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] They are sponges with a soft body that covers a hard, often massive skeleton made of calcium carbonate, either aragonite or calcite [citation ...

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 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.

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.

Moderately common, conspicuous; evident on vertical surfaces, crevices, overhangs. Geogr. Range: Monterey Bay to San Diego; also reported from British Columbia. Similar species: no other blue encrusting species occurs in Monterey Bay kelp forests.

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, …

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:

2024年5月27日 · All sponges belong to the taxonomic phylum Porifera, which is part of the kingdom Animalia and encompasses over 500 genera and between 5,000 and 10,000 different species. All sponges are aquatic animals with the vast majority living in saltwater environments.

Fossil specimen of the demosponge Verruculina reussi from the Cretaceous of Yorkshire, England (PRI 76847). Specimen is from the research collections of the Paleontological Research Institution, Ithaca, New York. Maximum diameter of specimen is approximately 9.5 cm.

kingdom Animalia phylum Porifera class Demospongiae Name Synonyms Sclerospongiae Homonyms Demospongiae Common names Demosponge in English