| Specimen ID | State | County | Locality | Year | HUC Number | Drainage Name | Status |
| 283557 | MI | Montcalm | Tamarack Lake | 2006 | 04060102 | Muskegon | established |
| 1563108 | MI | Montcalm | [No locality description provided] | 2014 | 04060102 | Muskegon | established |
| 1563155 | MI | Mecosta | [No locality description provided] | 2014 | 04060102 | Muskegon | established |
| 1564060 | MI | Roscommon | [No locality description provided] | 2014 | 04060102 | Muskegon | established |
| 1607634 | MI | Newaygo | [No locality description provided] | 2017 | 04060102 | Muskegon | established |
| 1563109 | MI | Montcalm | [No locality description provided] | 2014 | 04060102 | Muskegon | established |
| 1611727 | MI | Roscommon | [No locality description provided] | 2018 | 04060102 | Muskegon | established |
| 1611729 | MI | Roscommon | [Higgins Lake] [No locality description provided] | 2018 | 04060102 | Muskegon | established |
| 1611683 | MI | Roscommon | [No locality description provided] | 2018 | 04060102 | Muskegon | established |
| 1611697 | MI | Roscommon | [No locality description provided] | 2018 | 04060102 | Muskegon | established |
| 1611699 | MI | Roscommon | [No locality description provided] | 2018 | 04060102 | Muskegon | established |
| 1611714 | MI | Roscommon | [No locality description provided] | 2018 | 04060102 | Muskegon | established |
| 1611741 | MI | Roscommon | [Higgins Lake] [No locality description provided] | 2018 | 04060102 | Muskegon | established |
| 1611708 | MI | Roscommon | [No locality description provided] | 2018 | 04060102 | Muskegon | established |
| 1669844 | MI | Mecosta | Lake Mecosta | 2018 | 04060102 | Muskegon | unknown |
| 1669864 | MI | Roscommon | Houghton Lake | 2018 | 04060102 | Muskegon | unknown |
| 1692095 | MI | Muskegon | Muskegon Lake | 2020 | 04060102 | Muskegon | unknown |
| 1692108 | MI | Newaygo | Pickerel Lake | 2021 | 04060102 | Muskegon | unknown |
| 1886821 | MI | Muskegon | Muskegon Lake | 2019 | 04060102 | Muskegon | |
| 1886822 | MI | Muskegon | Muskegon Lake | 2020 | 04060102 | Muskegon | 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