Classify spicules?

Question

Demospongiae

Answer 1

I tried the link given by the first answer, but had no luck. I don't know if I'm doing something wrong with using that web site or not, but here is a different link that has the full classification in an easy to read format :
http://sn2000.taxonomy.nl/Taxonomicon/TaxonTree.aspx?id=11324

Here's a taxonomy table:
http://www-biol.paisley.ac.uk/Courses/Tatner/biomedia/units/pori7.htm

Here's a link to a branching key:
http://www.rosario.wwc.edu/inverts/InvertebrateGroupsKey.html

Hope this helps.

Answer 2

Spicules are structures produced by other cells that form the hard support systems of sponges. Spicules are small, needlelike structures located between the cell layers of a sponge. The spicules make some sponges hard for animals to eat them.

Answer 3

Spicules are the organic fibers that make up the internal skeleton of the sponges (Phylum Porifera).

Answer 4

Demospongiae, a class of mostly marine leuconoid sponges can have either siliceous spicules, spongin fibers or both present.

Answer 5

Try typing "Desmospongiae" in the NIHs taxonomy browser. It will give you the full lineage.

Answer 6

two points... I could have been risque