| Specimen ID | 1613946 |
| Group | Mollusks-Gastropods |
| Genus | Potamopyrgus |
| Species | antipodarum |
| Common Name | New Zealand mudsnail |
| State | CA |
| County | Contra Costa |
| Locality | Refugio Creek, approx. 100 m upstream of Sycamore Ave. |
| Mapping Accuracy | Accurate |
| HUC8 Name | San Pablo Bay |
| HUC8 Number | 18050002 |
| HUC10 Name | San Pablo Creek-Frontal San Pablo Bay Estuaries |
| HUC10 Number | 1805000207 |
| HUC12 Name | Pinole Creek-Frontal San Pablo Bay Estuaries |
| HUC12 Number | 180500020702 |
| Map | |
| Collection Day | 8 |
| Collection Month | 5 |
| Collection Year | 2019 |
| Year Accuracy | Actual |
| Potential Pathway | hitch hiker |
| Status | established |
| Comments | 576 individuals found in 600-organism subcount from bioassessment sample ID 206R02560 collected using State of CA SWAMP protocol for benthic macroinvertebrates, by AMS for CCCWP. Taxonomy verified by BioAssessment Services. |
| Record Type | NAS sighting report |
| Verifier | BioAssessment Services |
| Freshwater/Marine | Freshwater |
| Number Collected | 576 |
