[n = 12]
| Year / Period | From | To | Established | Ecol. effects |
|---|---|---|---|---|
| unknown | Unknown | Switzerland | probably not established | |
| unknown | Danube | Morocco | probably established | |
| 1900 - 1924 | Danube | UK (Thames) | not established | unknown |
| 1870 - 1874 | Unknown | USA | not established | |
| 1888 | Unknown | Czechoslovakia | not established | |
| 1954 | Yugoslavia | Belgium | not established | probably none |
| 1957 | Central Europe | France | not established | some |
| 1963 | Yugoslavia | Sweden | not established | |
| 1966 | Unknown | Poland | probably not established | |
| 1968 | Czechoslovakia | Spain | established | |
| 1968 | Czechoslovakia | Quebec | not established | |
| 1993 | Germany | Ireland | not established | unknown |