Four non-indigenous Pyramidellidae J. E. Gray, 1840 (Gastropoda, Heterobranchia) from the Mar Piccolo (Taranto, Italy), Ionian Sea

The discovery of four interesting non-indigenous molluscs belonging to the family Pyramidellidae, on the bottom of the Mar Piccolo (Taranto, Italy) is discussed: Syrnola fasciata Jickeli, 1882, Pyrgulina maiae Hornung & Mermod, 1924, Ondina michaelae Cachia & Mifsud, 2015 and Odetta sp. The first three species may have arrived in Mar Piccolo through maritime transport or due to the trade of edible molluscs; still, the possibility of their arrival through the natural expansion of their distribution range remains plausible. For Odetta sp., this latter possibility is excluded. S. fasciata and O. michelae are reported for the first time in Italian waters.