| Specimen ID | State | County | Locality | Year | HUC Number | Drainage Name | Status |
| 1321646 | MI | Huron | Wild Fowl Bay canal between J.B. Dr. and Connors Rd. off Port Austin Rd. | 2016 | 04240002 | Lake Huron | established |
| 1322328 | MI | Huron | Saginaw Bay, boat channel near Sunnyside Dr, Sebewaing | 2016 | 04240002 | Lake Huron | established |
| 1417514 | MI | Huron | About 0.6 miles west of M-25 on Pigeon Rd on the coast of Saginaw Bay | 2015 | 04240002 | Lake Huron | established |
| 1468161 | MI | Huron | [Geiger Rd, Saginaw Bay] | 2017 | 04240002 | Lake Huron | established |
| 1468911 | MI | Arenac | [Wigwam Bay] | 2018 | 04240002 | Lake Huron | established |
| 1468913 | MI | Bay | [Mallard Point, Saginaw Bay] | 2018 | 04240002 | Lake Huron | established |
| 1611632 | MI | Bay | [No locality description provided] | 2018 | 04240002 | Lake Huron | established |
| 1611633 | MI | Bay | [No locality description provided] | 2018 | 04240002 | Lake Huron | established |
| 1611657 | MI | Arenac | [No locality description provided] | 2018 | 04240002 | Lake Huron | established |
| 1611658 | MI | Arenac | [No locality description provided] | 2018 | 04240002 | Lake Huron | established |
| 1680163 | MI | Bay | Saginaw River (60 sites) | 2018 | 04240002 | Lake Huron | established |
| 1679331 | MI | Huron | [No locality description provided] | 2020 | 04240002 | Lake Huron | |
Citation for this information:
U.S. Geological Survey, 2025,
Nitellopsis obtusa: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov, Access Date: 12/4/2025