Specimen ID | State | County | Locality | Year |
| Drainage name | Status |
229271
| CA | | Islets in the Delta | 1979 |
18040003
| San Joaquin Delta | established |
1739350
| CA | Contra Costa | [No locality description provided] | 2024 |
18040003
| San Joaquin Delta | |
1437638
| CA | Contra Costa | Along Clifton Court Near Clifton Court Forebay. | 2007 |
18040003
| San Joaquin Delta | established |
1464226
| CA | Contra Costa | Big Break Marina edge by boat launch | 2017 |
18040003
| San Joaquin Delta | established |
259127
| CA | Contra Costa | Clifton Court Forebay | 2007 |
18040003
| San Joaquin Delta | collected |
232595
| CA | Contra Costa | Franks tract in the delta of the San Joaquin River | 1970 |
18040003
| San Joaquin Delta | established |
1464228
| CA | Contra Costa | Riprap levee toe edge where Little Dutch Slough meets Dutch Slough | 2018 |
18040003
| San Joaquin Delta | established |
1463680
| CA | Contra Costa | Riprap levee toe edge where Little Dutch Slough meets Dutch Slough | 2018 |
18040003
| San Joaquin Delta | established |
232597
| CA | Contra Costa | Rock Slough, about 1.2 miles east of junction with Sand Mound Slough | 1969 |
18040003
| San Joaquin Delta | established |
232596
| CA | Contra Costa | Sand Mound Slough, about 1.3 miles southwest of Franks Tract | 1969 |
18040003
| San Joaquin Delta | established |
232598
| CA | Contra Costa | southwest corner of Quimby Island | 1969 |
18040003
| San Joaquin Delta | established |
232599
| CA | San Joaquin | southeast end of Mandeville Island | 1969 |
18040003
| San Joaquin Delta | established |