New data on land molluscs from Sicily and biogeographical considerations

This paper is devoted to discussing new records of land molluscs from Sicily and the surrounding archipelagos (Italy) acquired during our survey in the field in the last twenty years (2004–2024). Monacha parumcincta, a species widespread in Kérkira Island (Greece) and Apennine Italy, is reported for the first time in northeastern Sicily; Sardovitrina polloneriana, up to now considered endemic to Sardinia Island (Italy), is recorded for the first time from Pantelleria Island and Linosa Island (Sicilian Channel); Aegopinella pura, a species with European distribution, is confirmed in Sicily on the summit part of the Madonie Mountains (northern Sicily); and Milax lopadusanus, recently described from Lampedusa Island (Pelagian Archipelago, Sicily), is here reported also for Marettimo Island (Aegadian Archipelago, Sicily). The species identification is based on morphological inspection of shells and genitalia. Taxonomy and biogeographic issues are discussed as well.