Need ID: which Bivalve? 3

[paul monfils]

Again, no widely used common name that I know of. But the common name derived from the Latin name would be "Cape Pearl Oyster". At least 95% of the described species of molluscs have no generally accepted common name.  The only species that typically end up with common names are those that are of particular interest to ordinary non-malacologist type folks, either as collectibles, for shellcraft, or of economic importance.  Also, keep in mind that the common names we are talking about here are just the English common names! In non-English speaking countries, collectors have their own common names for the same species, in their own language, which may or may not mean the same thing as the English common names.