| Specimen ID | 263387 |
| Group | Crustaceans-Cladocerans |
| Genus | Bythotrephes |
| Species | longimanus |
| Common Name | spiny waterflea |
| State | WI |
| County | Dane |
| Locality | Lake Mendota, in Madison |
| Mapping Accuracy | Accurate |
| HUC8 Name | Middle Rock |
| HUC8 Number | 07090002 |
| HUC10 Name | Lake Mendota-Yahara River |
| HUC10 Number | 0709000206 |
| HUC12 Name | Lake Mendota-Yahara River |
| HUC12 Number | 070900020604 |
| Map | |
| Collection Day | 21 |
| Collection Month | 9 |
| Collection Year | 2009 |
| Year Accuracy | Actual |
| Potential Pathway | shipping ballast water |
| Status | established |
| Record Type | Personal communication |
| Freshwater/Marine | Freshwater |
