| Specimen ID | 117283 |
| Group | Mollusks-Bivalves |
| Genus | Dreissena |
| Species | polymorpha |
| Common Name | zebra mussel |
| State | IL |
| County | Jersey |
| Locality | Illinois River (R.M. 0) at Grafton, IL (mouth of Illinois River) |
| Mapping Accuracy | Accurate |
| HUC8 Name | Peruque-Piasa |
| HUC8 Number | 07110009 |
| HUC10 Name | Portage Des Sioux-Mississippi River |
| HUC10 Number | 0711000904 |
| HUC12 Name | Marais Temps Clair-Mississippi River |
| HUC12 Number | 071100090401 |
| Map | |
| Collection Day | 23 |
| Collection Month | 12 |
| Collection Year | 1994 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker on small watercraft |
| Status | established |
| Comments | Specimens collected dead. |
| Record Type | Specimen |
| Disposal | preserved (shells) |
| Museum Cat Number | INHS 16973 |
| Verifier | Kevin Cummings, Illinois Natural History Survey |
| Freshwater/Marine | Freshwater |
| Number Collected | 5 |
