| Specimen ID | 1321330 |
| Group | Mollusks-Gastropods |
| Genus | Potamopyrgus |
| Species | antipodarum |
| Common Name | New Zealand mudsnail |
| State | CA |
| County | Alameda |
| Locality | Arroyo Las Positas approximately 300m upstream of Airway Blvd |
| Mapping Accuracy | Accurate |
| HUC8 Name | San Francisco Bay |
| HUC8 Number | 18050004 |
| HUC10 Name | Arroyo Las Positas |
| HUC10 Number | 1805000402 |
| HUC12 Name | Lower Arroyo Las Positas |
| HUC12 Number | 180500040203 |
| Map | |
| Collection Day | 25 |
| Collection Month | 5 |
| Collection Year | 2016 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker |
| Status | established |
| Comments | "388 individuals found in 600-organism subcount from bioassessment sample ID 204R01863 collected using State of CA SWAMP protocol for benthic macroinvertebrates..." |
| Record Type | NAS sighting report |
| Verifier | BioAssessment Services |
| Freshwater/Marine | Freshwater |
| Number Collected | 388 |
