[n = 11]
| Year / Period | From | To | Established | Ecol. effects |
|---|---|---|---|---|
| unknown | Unknown | Spain | probably established | unknown |
| unknown | Unknown | Azores Is. | established | unknown |
| unknown | Unknown | Portugal | established | |
| 1990 - 2000 | unknown | United Kingdom (Lake districts) | established | probably some |
| 1860 - 1880 | UK | Australia | established | |
| 1889 | England | Ireland | established | some |
| 1925 | France | Madagascar | not established | |
| 1934 | France | Morocco | established | |
| 1965 | Unknown | Kazakhstan | established | |
| 1972 | UK | Cyprus | established | |
| 1989 | Unknown | Italy | established | some |