Posted: Nov 12 2012

 Pitar fulminatus (Menke, 1828), Lightning Pitar

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ps1
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ps2
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ps5
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Pitarfulminatus7
Pitarfulminatus7
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Pitarfulminatus7-2
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Rev Pitar fulminatus 7-3
Rev Pitar fulminatus 7-3
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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.