Systematic List
The list is arranged by presumed biological affinity, rather than being alphabetical by family.
A number of species are listed with subspecies, in cases where there are well-recognized subspecies in different parts of Europe. For some species a synonym is given, where the species may perhaps be better known under another name.
An attempt has been made to label the families as aquatic, terrestrial or intermediate, and an indication is given where it is thought that the species is introduced. Those species that do not have a shell usually do not leave an archeological or fossil record, and therefore it is not always possible to determine whether they are native or introduced. Species are considered to be native, unless otherwise indicated; that information is taken from Kerney, 1999.
Read more about this topic: List Of Non-marine Molluscs Of Ireland
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