[n = 13]
| Year / Period | From | To | Established | Ecol. effects |
|---|---|---|---|---|
| unknown | Unknown | Finland | unknown | unknown |
| 1992 - 1993 | Russia | Poland | not established | unknown |
| 1993 - 2001 | Russian Federation | Netherlands | not established | no data |
| 1962 | Russia | Estonia | not established | none |
| 1962 | Ponto-Caspian | Lithuania | probably established | |
| 1962 | Unknown | USSR | not established | |
| 1962 | Unknown | Latvia | not established | unknown |
| 1963 | USSR | Japan | not established | |
| 1966 | Unknown | Sweden | established | unknown |
| 1993 | Russia | China | probably established | |
| 1994 | Unknown | Czech Republic | unknown | unknown |
| 1995 | Unknown | Denmark | not established | unknown |
| 1997 | Russia | Greece | unknown | unknown |