Type locality- Venice/Italy/Venice Lagoon '(Olivi, 1792- Very old Mediterranean record (Olivi, 1792), its main range is in the North Atlantic. Genetic investigations could not determine whether it is a relict from a former cold climatic spell or has been introduced from the Atlantic (Jansson, 1985; Reid, 1996).' (Zenetos et al. 2003). However, a more recent genetic study indicated that the Venice population is introduced, form northern Europe, ay least 300 years ago, and possibly centuries earlier (Panova et al. 2011; Crocetta 2011; Crocetta et al. 2013; Boffo et al. 2022). An nu=iche analysis by Boffo et al. suggest that the Lagoon of Venice may be the only suitable Mediterranean habitat for this snail.
Venice/Italy/Venice Lagoon '(Olivi, 1792, cited by Galil et al. 2002); Lido, Venice/Italy/Adriatic Sea (1883, USNM 185653, U.S. Museum of Natural History 2002; Boffo et al. 2022)
ReferencesCrocetta, Fabio (2011) Marine alien Mollusca in the Gulf of Trieste and neighbouring areas: a critical review and state of knowledge (updated in 2011), Acta Adriatica 52(2): 247 - 260,
Crocetta, Fabio; Macali, Armando; Furfaro, Giulia; Cooke, Samantha; Villani, Guido; Valdés, Ángel (2013) Alien molluscan species established along the Italian shores: an update, with discussions on some Mediterranean 'alien species' categories, ZooKeys 277: 91:108
Panova, Marina and 6 authors (2011) Glacial history of the North Atlantic marine snail, Littorina saxatilis, inferred from distribution of itochondrial DNA lineages, PLOS ONE 6(3): e17511