English: Sphaerium corneum (Linnæus, 1758). Distribution in Europe, scientific state of knowledge of 2012. Source description in English.
Light colour indicated rare occurrences or regions where the species could eventually be expected to occur.
Dark colour indicated relatively reliable occurrences, as well as regions where the species was expected to occur, and where the species was not known to be extremely rare. Dark colour indications were not necessarily based on published records.
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{{Information |Description= {{en|''Sphaerium corneum'' (Linnæus, 1758). Distribution in Europe, scientific state of knowledge of 2012. [http://www.planetposter.de/molluscs/eu-molluscs-en.htm Source description in English]. ::'''Light colour''' indicated rare occurrences or regions where the species could eventually be expected to occur. ::'''Dark colour''' indicated relatively reliable occurrences, as well as regions where the species was expected to occur, and where the species was not kno...