| Specimen ID | 1635351 |
| Group | Mollusks-Gastropods |
| Genus | Potamopyrgus |
| Species | antipodarum |
| Common Name | New Zealand mudsnail |
| State | CA |
| County | Marin |
| Locality | Walker Creek at the downstream end of the Walker Creek Ranch |
| Mapping Accuracy | Accurate |
| HUC8 Name | Tomales-Drake Bays |
| HUC8 Number | 18050005 |
| HUC10 Name | Walker Creek |
| HUC10 Number | 1805000502 |
| HUC12 Name | Walker Creek |
| HUC12 Number | 180500050203 |
| Map | |
| Collection Day | 10 |
| Collection Month | 2 |
| Collection Year | 2020 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker | hitch hiker on small watercraft |
| Status | unknown |
| Record Type | NAS sighting report |
| Verifier | Chelsea Callahan |
| Freshwater/Marine | Freshwater |
| Number Collected | 25 |
| Photo | |
