| Specimen ID | 1468795 |
| Group | Mollusks-Gastropods |
| Genus | Potamopyrgus |
| Species | antipodarum |
| Common Name | New Zealand mudsnail |
| State | CA |
| County | Contra Costa |
| Locality | Grayson Creek 500 m north of Concord Ave |
| Mapping Accuracy | Accurate |
| HUC8 Name | Suisun Bay |
| HUC8 Number | 18050001 |
| HUC10 Name | Walnut Creek-Frontal Suisin Bay Estuaries |
| HUC10 Number | 1805000102 |
| HUC12 Name | Walnut Creek-Frontal Suisin Bay Estuaries |
| HUC12 Number | 180500010204 |
| Map | |
| Collection Day | 30 |
| Collection Month | 5 |
| Collection Year | 2018 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker | dispersed |
| Status | established |
| Comments | 2 individuals found in 600-organism subcount from bioassessment sample ID 207R02315 collected using State of CA SWAMP protocol for benthic macroinvertebrates, by AMS for ACCWP. Taxonomy verified by BioAssessment Services. |
| Record Type | NAS sighting report |
| Verifier | BioAssessment Services |
| Freshwater/Marine | Freshwater |
| Number Collected | 2 |
