| Agelasida | |
|---|---|
 | |
| Agelas oroides | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Porifera |
| Class: | Demospongiae |
| Subclass: | Heteroscleromorpha |
| Order: | Agelasida Hartman, 1980 [1] |
| Families | |
| |
Agelasida is an order of sea sponges in the class Demospongiae. [2]
Demosponges (Demospongiae) are the most diverse class in the phylum Porifera. They include 76.2% of all species of sponges with nearly 8,800 species worldwide. They are sponges with a soft body that covers a hard, often massive skeleton made of calcium carbonate, either aragonite or calcite. They are predominantly leuconoid in structure. 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. Some species, in particular from the Antarctic, obtain the silica for spicule building from the ingestion of siliceous diatoms.
The Clathrinida are an order of calcareous sponges found in marine environments. These sponges have an asconoid structure and lack a true dermal membrane or cortex. The spongocoel is lined with choanocytes.
Tetillidae is a family of marine sponges. Tetillids are more or less spherical sponges which are found commonly in all marine habitats at all depths throughout the world. They are especially common in sedimented habitats. Over a hundred species have been described in ten genera.
Homosclerophorida is an order of marine sponges. It is the only order in the monotypic class Homoscleromorpha. The order is composed of two families: Plakinidae and Oscarellidae.
Clathrina multiformis is a species of calcareous sponge from Russia.
Racekiela ryderi is a species of freshwater sponge in the family Spongillidae. It was first described by Edward Potts in 1882. It was collected on Sable Island in 1899 by John Macoun, a biologist with the Geological Survey of Canada, and given the name Heteromeyenia macouni by A.H. Mackay in 1900. It was originally assumed to be endemic to Sable Island but is now considered to be the same species as Racekiela ryderi, which is more broadly distributed.
Pseudospongosorites is a genus of sea sponges belonging to the family Suberitidae. Currently, the genus is considered as monotypic, consisting of a single species Pseudospongosorites suberitoides. It is found in the Caribbean Sea, the Gulf of Mexico and on the Atlantic coast of the United States as far north as North Carolina. This species is known by the common name Florida hermit crab sponge, so named because hermit crabs often use it as shelter.
Homaxinella is a genus of sea sponges in the family Suberitidae. The type species is Homaxinella balfourensis.
Dictyoceratida is an order of sponges in the subclass Ceractinomorpha containing five families. Along with the Dendroceratida, it is one of the two orders of demosponges that make up the keratose or "horny" sponges, in which a mineral skeleton is minimal or absent and a skeleton of organic fibers containing spongin, a collagen-like material, is present instead.
Guancha apicalis was thought to be a species of calcareous sponge in the genus Guancha from Antarctica. It actually never existed.
Cladorhiza inversa is a species of sponge in the taxonomic class Demospongiae. The body of the sponge consists of a spicule and fibers and is water absorbent.
Cladorhiza segonzaci is a species of sponge in the taxonomic class Demospongiae. The body of the sponge consists of a spicule and fibers and is water absorbent.
Tethyida is an order of sea sponges in the subclass Heteroscleromorpha.
Trachycladidae is a family of sea sponges in the subclass Heteroscleromorpha. It is the only family in the monotypic order Trachycladida.
Spongillida is an order of freshwater sponges in the subclass Heteroscleromorpha.
Leucandra villosa is a species of calcareous sponge in the family Grantiidae. The sponge lives in the sea and its sclereid consists of calcium carbonate. The scientific name of the species was first published in 1885 by Lendenfeld.
Jean Vacelet is a French marine biologist who specialises in the underwater fauna of the Mediterranean. After earning his licence at the Faculté des Sciences de Marseille and learning to dive in 1954, he specialised in the study of sponges at the Marine station of Endoume, and there he has stayed faithful to both sponges and place for more than half a century. His research has included all aspects of sponges: taxonomy, habitat, biology, anatomy, their bacterial associations, and their place in the evolution of multi-celled animals. He has studied them not only in the Mediterranean but in the Indian Ocean and the Pacific. Exploration of underwater grottoes, together with Jacques Laborel and Jo Hamelin, revealed the existence of sponges dating from very ancient geological periods and the unexpected existence of carnivorous sponges, and surprisingly, the grottoes in some ways mimicked life at much greater depths.
Pipestela is a genus of sponges belonging to the family Axinellidae. The species of this genus are found in Australian waters, New Guinea and other countries to the north of Australia.
Robertus Wilhelmus Maria (Rob) van Soest, born in 1946, is a Dutch marine biologist. He works at the Naturalis Biodiversity Center and is also affiliated with the University of Amsterdam. He co-authored with John N. A. Hooper Systema Porifera: A Guide to the Classification of Sponges, a standard reference for sponge classification.
Data related to Agelasida at Wikispecies  | This article about a demosponge is a stub. You can help Wikipedia by expanding it. |