Sponge Clade Spicule Mineralogy (check correct) Calcitic Wall: Spongin Siliceous Calcareous Y/N Hexactinellida Demospongea Calcarea
*Hexactinellid sponges, often known as glass sponges, are sponges having a skeleton consisting of four- and/or six-pointed siliceous spicules.
*Although they are typically grouped alongside other sponges in the phylum Porifera, some scientists believe that Symplasma is a more appropriate classification for them.
*The most varied class in the phylum Porifera is the demosponges. They make up almost 8,800 species worldwide, or 76.2% of all sponge species. They are sponges with a soft body covering a rigid, frequently huge skeleton comprised of either aragonite or calcite, a calcium carbonate mineral.
*The animal phylum Porifera, which includes the cellular sponges, includes the calcareous sponges of class Calcarea. They are distinguished by calcium carbonate spicules in the form of calcite or aragonite. While the majority of species' spicules have three points, certain species' spicules have two or four points.
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