| Specimen ID | 256647 |
| Group | Mollusks-Gastropods |
| Genus | Potamopyrgus |
| Species | antipodarum |
| Common Name | New Zealand mudsnail |
| State | CA |
| County | Contra Costa |
| Locality | Canal [along the Delta de Anza Trail in Antioch, just N of the municipal reservoir] |
| Mapping Accuracy | Accurate |
| HUC8 Name | San Joaquin Delta |
| HUC8 Number | 18040003 |
| HUC10 Name | Middle River-San Joaquin River |
| HUC10 Number | 1804000309 |
| HUC12 Name | Markley Canyon-San Joaquin River |
| HUC12 Number | 180400030907 |
| Map | |
| Collection Day | 15 |
| Collection Month | 10 |
| Collection Year | 2008 |
| Year Accuracy | Estimated |
| Potential Pathway | unknown |
| Status | unknown |
| Reference 1 |
| Ref. Number: | 18178 |
| Author: | Post.D. |
| Date: | 2008 |
| Title: | New Zealand mudsnails in California. |
| Journal: | (Unpublished data) |
| Publisher: | California Dept of Fish and Game. |
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| Record Type | Literature |
| Freshwater/Marine | Freshwater |
