In the autumn of 2013 the mollusc fauna of the coastal gun battery near Durgerdam, province of North-Holland, was studied for the third time. This time only aquatic biotopes surrounding the artificial Lighthouse island were surveyed. Fifteen species were recorded among which eight for the first time. This implies that now 18 aquatic mollusc species are known from this former military stronghold near Durgerdam.

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Spirula

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Nederlandse Malacologische Vereniging

H.K. Mienis. (2014). Aanvullende informatie betreffende de aanwezigheid van aquatische mollusken op of om de kustbatterij bij Durgerdam, het zogenaamde Vuurtoren-eiland. Spirula, 398, 87–88.