| Specimen ID | 116225 |
| Group | Mollusks-Bivalves |
| Genus | Dreissena |
| Species | polymorpha |
| Common Name | zebra mussel |
| State | IL |
| County | Henderson |
| Locality | Mississippi River, Lock & Dam No. 18, near Oquawka, IL (River Mile 410.5) |
| Mapping Accuracy | Accurate |
| HUC8 Name | Flint-Henderson |
| HUC8 Number | 07080104 |
| HUC10 Name | Yellow Spring Creek-Mississippi River |
| HUC10 Number | 0708010411 |
| HUC12 Name | Berton Bay-Mississippi River |
| HUC12 Number | 070801041103 |
| Map | |
| Collection Day | 14 |
| Collection Month | 1 |
| Collection Year | 1992 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker on small watercraft |
| Status | established |
| Record Type | Personal communication |
| Freshwater/Marine | Freshwater |
| Number Collected | 3 |
| Size | 9 mm |
