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Amphidiscosida

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Amphidiscosida is an order of hexactinellid sponges characterized by amphidisc spicules, that is, spicules having a stellate disk at each end.[2] They are in the class Hexactinellida and are the only order classified in the monotypic subclass Amphidiscophora.[3] Species of the order Amphidiscosida have existed since the Ordovician period, and still flourish today.[4]

Families

References

  1. ^ Schrammen, A. (1924). Die Kieselspongien der oberen Kreide von Nordwestdeutschland. Volume 3. Berlin: Gebrüder Borntraeger.
  2. ^ "Amphidiscophora".
  3. ^ "Search Results - AccessScience from McGraw-Hill Education". www.accessscience.com. Retrieved 9 February 2019.
  4. ^ "Hexactinellida: Fossil Record".
  5. ^ Gray, 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.
  6. ^ Ijima, I. (1927). The Hexactinellida of the Siboga Expedition. In Weber, M. (Ed.), Siboga-Expeditie (1–383). Leiden: E. J. Brill.
  7. ^ Gray, J. E. (1870). Notes on anchoring sponges (in a letter to Mr. Moore). The Annals and Magazine of Natural History, [4]6(34), 309–312.
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Amphidiscosida: Brief Summary

provided by wikipedia EN

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 Hexactinellida 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.

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