Sclerocyte

Sclerocytes are spicule secreting cells, found in sponges. They secrete calcareous or siliceous spicules which are found in the mesohyl layer of sponges. The sclerocytes produce spicules via formation of a cellular triad. The triad of cells then undergo mitosis, creating six sclerocytes. In pairs, the sclerocytes secrete the minerals which create the spicules.^{[citation needed]}

• http://acd.ufrj.br/labpor/4-Bibliografia/Pdfs/Imsiecke95a.pdf