| Specimen ID | 116195 |
| Group | Mollusks-Bivalves |
| Genus | Dreissena |
| Species | polymorpha |
| Common Name | zebra mussel |
| State | IL |
| County | Marshall |
| Locality | Illinois River (R.M. 180.3), near Chilicothe, IL |
| Mapping Accuracy | Accurate |
| HUC8 Name | Lower Illinois-Senachwine Lake |
| HUC8 Number | 07130001 |
| HUC10 Name | Partridge Creek-Illinois River |
| HUC10 Number | 0713000117 |
| HUC12 Name | Blalock Creek-Illinois River |
| HUC12 Number | 071300011702 |
| Map | |
| Collection Day | 24 |
| Collection Month | 7 |
| Collection Year | 1991 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker on small watercraft |
| Status | established |
| Record Type | Personal communication |
| Disposal | alcohol |
| Museum Cat Number | Il.Nat.Hist.Sur. Havana, IL |
| Verifier | K.Douglas Blodgett,IL Nat.Hist.Surv., Havana IL 62 |
| Freshwater/Marine | Freshwater |
| Number Collected | 1 |
| Year Class | adult |
| Size | 19 mm |
