In June 2011 the ovulid gastropod Xandarovula patula (Pennant, 1777) was found for the first time by scuba divers in the Dutch part of the North Sea, on Dogger Bank and Cleaver Bank.

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Spirula

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Nederlandse Malacologische Vereniging

N. Schrieken, A. Gittenberger, & W. Lengkeek. (2012). Expeditie Doggersbank introduceert de Stiefelslak Xandarovula patula (Pennant, 1777). Spirula, 385, 48–49.