| Specimen ID | 1547873 |
| Group | Mollusks-Bivalves |
| Genus | Dreissena |
| Species | polymorpha |
| Common Name | zebra mussel |
| State | IA |
| County | Hancock |
| Locality | Crystal Lake |
| Mapping Accuracy | Accurate |
| HUC8 Name | Upper Iowa |
| HUC8 Number | 07080207 |
| HUC10 Name | West Branch Iowa River |
| HUC10 Number | 0708020701 |
| HUC12 Name | Headwaters West Branch Iowa River |
| HUC12 Number | 070802070101 |
| Map
NAS ARM
| |
| Collection Month | 6 |
| Collection Year | 2019 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker on small watercraft |
| Status | unknown |
| Reference 1 |
| Ref. Number: | 33331 |
| Author: | Iowa Department of Natural Resources. |
| Date: | 2019 |
| Title: | Zebra mussels found in Crystal Lake. |
|
|
| Comments | No adults observed in a follow-up survey. |
| Record Type | Literature |
| Verifier | Iowa Dept. of Natural Resources |
| Freshwater/Marine | Freshwater |
| Number Collected | several |
| Year Class | veligers and juveniles |
