Amphidiscosida

Amphidiscosida
Temporal range: Ordovician–Recent
Scientific classification
Kingdom: Animalia
Phylum: Porifera
Class: Hexactinellida
Subclass: Amphidiscophora
Order: Amphidiscosida
Schrammen, 1924[1]

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 the subclass Amphidiscophora[3] The creatures have been existing since the Ordovician period, and still flourishing today."[4]

Families

References

  1. ↑ Schrammen, A. (1924). Die Kieselspongien der oberen Kreide von Nordwestdeutschland. Volume 3. Berlin: Gebrüder Borntraeger.
  2. ↑ "Amphidiscophora".
  3. ↑ http://accessscience.com/search.aspx?rootID=790336
  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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