| Specimen ID | State | County | Locality | Year | HUC Number | Drainage Name | Status |
| 1522601 | MI | Wayne | Belle Isle | 1983 | 04090004 | Detroit | established |
| 1522602 | MI | Wayne | Belle Isle | 1983 | 04090004 | Detroit | established |
| 1522603 | MI | Wayne | Point Hennepin | 1983 | 04090004 | Detroit | established |
| 1561074 | MI | Wayne | [No locality description provided] | 2014 | 04090004 | Detroit | established |
| 1562008 | MI | Oakland | [No locality description provided] | 2014 | 04090004 | Detroit | established |
| 1562032 | MI | Oakland | [No locality description provided] | 2014 | 04090004 | Detroit | established |
| 1562135 | MI | Oakland | [No locality description provided] | 2014 | 04090004 | Detroit | established |
| 1562155 | MI | Oakland | [No locality description provided] | 2014 | 04090004 | Detroit | established |
| 1669877 | MI | Wayne | Detroit River | 2018 | 04090004 | Detroit | unknown |
| 1680156 | MI | Wayne | Detroit River at Gibraltar | 2018 | 04090004 | Detroit | established |
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