| Specimen ID | State | County | Locality | Year | HUC Number | Drainage Name | Status |
| 1732346 | MN | St. Louis | Ponds behind Erie Pier, St. Louis River Estuary | 2023 | 04010201 | St. Louis | |
| 1736945 | MN | St. Louis | Site 5, East Stream, outlet from wetlands downstream of Mary Ellen Pit, tributary of Embarrass River | 2009 | 04010201 | St. Louis | established |
| 1736946 | MN | St. Louis | Site 7, East stream outlet from wetlands downstream of Mary Ellen Pit, tributary of Embarrass River | 2009 | 04010201 | St. Louis | established |
| 1736947 | MN | St. Louis | Site 5, East Stream, outlet from wetlands downstream of Mary Ellen Pit, tributary of Embarrass River | 2010 | 04010201 | St. Louis | established |
Citation for this information:
U.S. Geological Survey, 2026,
Urnatella gracilis: U.S. Geological Survey, Nonindigenous Aquatic Species Database, Gainesville, FL, https://nas.er.usgs.gov, Access Date: 6/4/2026