| Specimen ID | 116500 |
| Group | Mollusks-Bivalves |
| Genus | Dreissena |
| Species | polymorpha |
| Common Name | zebra mussel |
| State | IL |
| County | Carroll |
| Locality | Mississippi River (R.M. 538.4) on the Illinois side of the river at Savanna, Illinois |
| Mapping Accuracy | Accurate |
| HUC8 Name | Apple-Plum |
| HUC8 Number | 07060005 |
| HUC10 Name | Deer Creek-Mississippi River |
| HUC10 Number | 0706000512 |
| HUC12 Name | Beaver Creek-Mississippi River |
| HUC12 Number | 070600051201 |
| Map | |
| Collection Day | 17 |
| Collection Month | 9 |
| Collection Year | 1992 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker on small watercraft |
| Status | established |
| Record Type | Personal communication |
| Verifier | Pam Thiel, USFWS-EMTC, Onalaska, Wisconsin 608-783 |
| Freshwater/Marine | Freshwater |
| Number Collected | 7 |
| Year Class | adult |
