The junction zone: Initial site of mineralization in radula teeth of the chiton Cryptoplax striata (Mollusca: Polyplacophora)

Journal of Morphology
David J Macey, Lesley R Brooker

Abstract

Elemental composition and distribution in individual teeth of the whole radula of the chiton Cryptoplax striata were analyzed using energy-dispersive spectroscopy. Both the element deposited and its position within the tooth vary according to the stage of mineralization. The initial site of mineralization is the junction zone, the region between the tooth cusp and base. In this region, the first element to be deposited is iron, followed by phosphorus and then calcium. Iron deposition next commences in the tooth cusp cap, where it proceeds rapidly, being virtually complete within 12 tooth rows. By contrast, mineralization in the core of the tooth cusp does not commence until well down the radula and consists initially of iron and phosphorus with the addition of a small amount of calcium 6 rows later. While mineralization in the tooth base commences early in radula development, it continues right through to the fully mature end of the radula. A number of minor elements are also found at various stages of mineralization. The data obtained have been used to construct a schematic of the progression of mineralization along the length of the radula. © 1996 Wiley-Liss, Inc.

Citations

Dec 25, 2008·Journal of Morphology·Jeremy A ShawPeta L Clode
Jun 17, 2005·Journal of Morphology·Rosamund J WealthallBrendan J Griffin
Feb 18, 2003·Journal of Biological Inorganic Chemistry : JBIC : a Publication of the Society of Biological Inorganic Chemistry·Alasdair P LeeWilhelm van Bronswijk
Mar 17, 2009·Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada·Jeremy A ShawPeta L Clode
Aug 22, 2020·Journal of the Mechanical Behavior of Biomedical Materials·Anna PohlDavid Kisailus

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