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. Spicules are skeletal structures that appear in some types of sponges. ... This article is about the animal. ... Triad (Simplified Chinese: 三合会; Traditional Chinese: 三合會; Hanyu Pinyin: ; literally Triad Society) is a collective term that describes many branches of an underground society and organizations based in Hong Kong and also operating in Mainland China, Macao, and Chinatowns in Europe, North America, South Africa, Australia and New Zealand. ... Light micrograph of a newt lung cell in early anaphase of mitosis. ...