Amphidiscosida is an order of

hexactinellid Hexactinellid sponges are sponges with a skeleton made of four- and/or six-pointed siliceous spicules, often referred to as glass sponges. They are usually classified along with other sponges in the phylum Porifera, but some researchers consider ...

sponge Sponges, the members of the phylum Porifera (; meaning 'pore bearer'), are a basal animal clade as a sister of the diploblasts. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate throug ...

s characterized by amphidisc spicules, that is, spicules having a stellate disk at each end. They are in the class

Hexactinellida Hexactinellid sponges are sponges with a skeleton made of four- and/or six-pointed siliceous spicules, often referred to as glass sponges. They are usually classified along with other sponges in the phylum Porifera, but some researchers consider ...

and are the only order classified in the monotypic subclass Amphidiscophora. Species of the order Amphidiscosida have existed since the Ordovician period, and still flourish today.

Families

Hyalonematidae Hyalonematidae is a family of sponges belonging to the order Amphidiscosida Amphidiscosida is an order of hexactinellid sponges characterized by amphidisc spicules, that is, spicules having a stellate disk at each end. They are in the class Hex ...

Gray, 1857Gray, J. E. (1857). Synopsis of the families and genera of axiferous zoophytes or barked corals. ''Proceedings of the Zoological Society of London'', 25(1), 278–294. *

Monorhaphididae ''Monorhaphis'' is a monotypic genus of siliceous deep sea Hexactinellid sponges. The single species is the type species In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or sub ...

Ijima, 1927Ijima, I. (1927). The Hexactinellida of the Siboga Expedition. In Weber, M. (Ed.), ''Siboga-Expeditie'' (1–383). Leiden: E. J. Brill. *

Pheronematidae Pheronematidae is a family of sponges belonging to the order Amphidiscosida Amphidiscosida is an order of hexactinellid sponges characterized by amphidisc spicules, that is, spicules having a stellate disk at each end. They are in the class Hex ...

Gray, 1870Gray, J. E. (1870). Notes on anchoring sponges (in a letter to Mr. Moore). ''The Annals and Magazine of Natural History'', (34), 309–312.

References

Hexactinellida Sponge orders {{poriferan-stub