| Specimen ID | 116196 |
| Group | Mollusks-Bivalves |
| Genus | Dreissena |
| Species | polymorpha |
| Common Name | zebra mussel |
| State | IL |
| County | Madison |
| Locality | Mississippi River (R.M. 202.9), Mel Price Lock & Dam #26 near Alton, IL |
| Mapping Accuracy | Accurate |
| HUC8 Name | Peruque-Piasa |
| HUC8 Number | 07110009 |
| HUC10 Name | Portage Des Sioux-Mississippi River |
| HUC10 Number | 0711000904 |
| HUC12 Name | City of Alton-Mississippi River |
| HUC12 Number | 071100090402 |
| Map | |
| Collection Day | 10 |
| Collection Month | 9 |
| Collection Year | 1991 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker on small watercraft |
| Status | established |
| Record Type | Personal communication |
| Museum Cat Number | Il.Nat.Hist.Sur. Havana, IL |
| Verifier | K.Douglas Blodgett, IL Nat.Hist.Surv., Havana IL 6 |
| Freshwater/Marine | Freshwater |
| Number Collected | 21 |
| Year Class | juvenile |
| Size | 12.8-14.6 mm |
