| Specimen ID | State | County | Locality | Year | HUC Number | Drainage Name | Status |
| 1320648 | MI | Barry | Long Lake, SW shoreline near Cloverdale Lake | 2016 | 04050007 | Thornapple | established |
| 1407074 | MI | Barry | Long Lake, SW shoreline near Cloverdale Lake | 2017 | 04050007 | Thornapple | established |
| 1678154 | MI | Barry | [No locality description provided] | 2018 | 04050007 | Thornapple | |
| 1691995 | MI | Kent | Campau Lake | 2020 | 04050007 | Thornapple | unknown |
| 1562249 | MI | Barry | [No locality description provided] | 2014 | 04050007 | Thornapple | established |
| 1562237 | MI | Barry | [No locality description provided] | 2014 | 04050007 | Thornapple | established |
| 1891163 | MI | Barry | [No locality description provided] | 2025 | 04050007 | Thornapple | |
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