| Specimen ID | 1657395 |
| Group | Mollusks-Gastropods |
| Genus | Potamopyrgus |
| Species | antipodarum |
| Common Name | New Zealand mudsnail |
| State | CA |
| County | Siskiyou |
| Locality | Shasta River (mouth) at the Klamath River |
| Mapping Accuracy | Accurate |
| HUC8 Name | Shasta |
| HUC8 Number | 18010207 |
| HUC10 Name | Yreka Creek-Shasta River |
| HUC10 Number | 1801020705 |
| HUC12 Name | Bunton Hollow Creek-Shasta River |
| HUC12 Number | 180102070503 |
| Map | |
| Collection Day | 14 |
| Collection Month | 10 |
| Collection Year | 2020 |
| Year Accuracy | Actual |
| Potential Pathway | dispersed current | hitch hiker |
| Status | unknown |
| Comments | Fairly high densities at CDFW weir site above mouth of Shasta River at the Klamath River. |
| Record Type | NAS sighting report |
| Verifier | L. Breck McAlexander (CDFW) |
| Freshwater/Marine | Freshwater |
| Number Collected | 200 |
