Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
850925
| MT | Garfield | Krieder Reservoir | 1985 |
10040205
| Lower Musselshell | established |
850924
| MT | Garfield | Krieder Reservoir | 1990 |
10040205
| Lower Musselshell | eradicated |
264305
| MT | Garfield | Musselshell River | 2000 |
10040205
| Lower Musselshell | established |
264306
| MT | Garfield | Musselshell River | 2003 |
10040205
| Lower Musselshell | established |
264299
| MT | Musselshell | Musselshell River at bend | 2000 |
10040205
| Lower Musselshell | established |
264298
| MT | Musselshell | Musselshell River at bend | 2003 |
10040205
| Lower Musselshell | established |
264308
| MT | Petroleum | Sacagawea River | 1999 |
10040205
| Lower Musselshell | established |
264307
| MT | Petroleum | Sacagawea River | 2003 |
10040205
| Lower Musselshell | established |