| Specimen ID | 273099 |
| Group | Mollusks-Gastropods |
| Genus | Potamopyrgus |
| Species | antipodarum |
| Common Name | New Zealand mudsnail |
| State | CA |
| County | Napa |
| Locality | Napa River at the Yountville Ecological Preserve |
| Mapping Accuracy | Accurate |
| HUC8 Name | San Pablo Bay |
| HUC8 Number | 18050002 |
| HUC10 Name | Napa River |
| HUC10 Number | 1805000202 |
| HUC12 Name | Lower Napa River |
| HUC12 Number | 180500020205 |
| Map | |
| Collection Day | 10 |
| Collection Month | 11 |
| Collection Year | 2010 |
| Year Accuracy | Actual |
| Potential Pathway | unknown |
| Status | established |
| Record Type | NAS sighting report |
| Freshwater/Marine | Freshwater |
