| Specimen ID | 1658464 |
| Group | Mollusks-Gastropods |
| Genus | Potamopyrgus |
| Species | antipodarum |
| Common Name | New Zealand mudsnail |
| State | CA |
| County | Alameda |
| Locality | Arroyo Viejo, upstream of Bancroft Ave. |
| Mapping Accuracy | Accurate |
| HUC8 Name | San Francisco Bay |
| HUC8 Number | 18050004 |
| HUC10 Name | San Lorenzo Creek-Frontal San Francisco Bay Estuaries |
| HUC10 Number | 1805000408 |
| HUC12 Name | Sausal Creek-Frontal San Francisco Bay Estuaries |
| HUC12 Number | 180500040805 |
| Map | |
| Collection Day | 4 |
| Collection Month | 5 |
| Collection Year | 2021 |
| Year Accuracy | Actual |
| Potential Pathway | dispersed | hitch hiker |
| Status | established |
| Comments | 6 individuals found in sample of 600-organism subcount from bioassessment sample collected
using State of CA SWAMP protocol for benthic macroinvertebrates |
| Record Type | NAS sighting report |
| Verifier | BioAssessment Services |
| Freshwater/Marine | Freshwater |
| Number Collected | 6 |
