Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
36651
| MT | | Judith River, upper | 1980 |
10040103
| Judith | collected |
36798
| MT | | Missouri-Poplar (HUC6) non-specific | 2000 |
10060000
| Missouri-Poplar | established |
36688
| MT | | Pend Orielle drainage | 1980 |
17010200
| Pend Oreille | collected |
159955
| MT | | Stillwater River | 1999 |
17010208
| Flathead Lake | established |
36799
| MT | | Yellowstone River, lower | 2000 |
10070007
| Upper Yellowstone-Pompeys Pillar | established |
36680
| MT | Big Horn | Big Horn River near junction w/ Little Bighorn | 1980 |
10080015
| Lower Bighorn | collected |
36678
| MT | Big Horn | Tongue River, upper, near state line | 1980 |
10090101
| Upper Tongue | collected |
164096
| MT | Cascade | Benton Lake Wetland Management District | 2005 |
10030102
| Upper Missouri-Dearborn | established |
36686
| MT | Chouteau | Missouri River at northernmost bend in river | 1980 |
10040101
| Bullwhacker-Dog | collected |
1697559
| MT | Flathead | Beaver Lake | 1999 |
17010210
| Stillwater | |
1697580
| MT | Flathead | Dollar Lake | 1997 |
17010210
| Stillwater | |
1697614
| MT | Flathead | Little Beaver Lake | 1999 |
17010210
| Stillwater | established |
1697639
| MT | Flathead | Murray Lake | 1999 |
17010210
| Stillwater | eradicated |
36683
| MT | Garfield | south of Fort Peck Reservoir | 1980 |
10040205
| Lower Musselshell | collected |
36687
| MT | Hill | Milk drainage, [upper] | 1980 |
10050000
| Milk | collected |
1697743
| MT | Missoula | Harpers Lake | 1999 |
17010203
| Blackfoot | established |
1697757
| MT | Missoula | Kreises Lake AKA Kreis Pond | 1994 |
17010204
| Middle Clark Fork | established |
36684
| MT | Petroleum | Box Elder Creek | 1980 |
10040204
| Box Elder | collected |
36682
| MT | Stillwater | Big Lake | 1980 |
10070004
| Upper Yellowstone-Lake Basin | collected |
1697791
| MT | Toole | Cameron Reservoir | 1994 |
10030204
| Willow | established |
1697794
| MT | Toole | Lake Shel-Oole | 1994 |
10030203
| Marias | established |
1697842
| MT | Valley | Paulo Reservoir | 1994 |
10050012
| Lower Milk | established |
36681
| MT | Yellowstone | Yellowstone River near Billings | 1980 |
10070004
| Upper Yellowstone-Lake Basin | collected |