| Specimen ID | 862461 |
| Group | Mollusks-Gastropods |
| Genus | Potamopyrgus |
| Species | antipodarum |
| Common Name | New Zealand mudsnail |
| State | CA |
| County | Contra Costa |
| Locality | Marsh Creek just S of intersection at Sand Creek Rd and Ohara Ave |
| Mapping Accuracy | Accurate |
| HUC8 Name | San Joaquin Delta |
| HUC8 Number | 18040003 |
| HUC10 Name | Marsh Creek |
| HUC10 Number | 1804000307 |
| HUC12 Name | Lower Marsh Creek |
| HUC12 Number | 180400030702 |
| Map | |
| Collection Day | 23 |
| Collection Month | 4 |
| Collection Year | 2015 |
| Year Accuracy | Actual |
| Potential Pathway | unknown |
| Status | established |
| Record Type | Personal communication |
| Verifier | Tom King |
| Freshwater/Marine | Freshwater |
