Posted: Nov 12 2012

For those interested in more information regarding the chalky periostracum-like covering found on some bivalves, Paul Valentich-Scott, Curator of Malacology, Santa Barbara Museum of Natural History, has provided this reference:

Glover, E. A. & Taylor, J. D. 2010. Needles and pins: acicular crystalline periostracal calcification in venerid bivalves (Bivalvia: Veneridae) Journal of Molluscan Studies (2010) 76: 157–179.