| Specimen ID | 1884170 |
| Group | Mollusks-Gastropods |
| Genus | Potamopyrgus |
| Species | antipodarum |
| Common Name | New Zealand mudsnail |
| State | CA |
| County | Humboldt |
| Locality | Little River |
| Mapping Accuracy | Accurate |
| HUC8 Name | Mad-Redwood |
| HUC8 Number | 18010102 |
| HUC10 Name | Big Lagoon-Frontal Pacific Ocean |
| HUC10 Number | 1801010205 |
| HUC12 Name | Little River |
| HUC12 Number | 180101020502 |
| Map | |
| Collection Day | 21 |
| Collection Month | 7 |
| Collection Year | 2025 |
| Year Accuracy | Actual |
| Potential Pathway | dispersed | hitch hiker |
| Comments | A restoration project is in progress in the unnamed ditch flowing into Little River. Confluence of Little River and ditch at tidegate at mouth of ditch and within the ditch. Many snails observed on sandbacks placed on exclusion fence just upstream of the tidegate. In Little River, dead snails observed on rocks immediately below tidegate. |
| Record Type | NAS sighting report |
| Verifier | Beatrijs deWaard (California Department of Fish and Wildlife) |
| Freshwater/Marine | Freshwater |
| Number Collected | 500 |
