: the species is currently present in 2 of them (endemic, native, introduced);
: possible in 2 of them (stray, questionable);
: absent from 2 of them (extirpated, not established, misidentification, error).
: all reports listed together.
Distribution: Europe: Lakes Como, Garda, Orta, Maggiore, Lugano and Iseo (northern Italy, Switzerland). Introduced in Lakes Bolsena, Bracciano and Vico (central Italy).
The map in this page was supported by BioFresh that has received funding from the
European Union's Seventh Programme for research, technological development and demonstration under grant agreement No 226874