| Nominal Species (n = 12) | Present allocation (n = 12) | Ref. |
|---|---|---|
| Fossaria alberta Baker, 1919 | Fossaria alberta | 19 |
| Lymnaea atkaensis Dall, 1884 | Lymnaea atkaensis | 19 |
| Fossaria cockerelli Pilsbry & Ferriss, 1906 | Fossaria cockerelli | 19 |
| Lymnaea cousini Jousseaume, 1887 | Lymnaea cousini | 2384 |
| Stagnicola elrodiana Baker, 1935 | Stagnicola elrodiana | 19 |
| Fossaria hendersoni Baker, 1909 | Fossaria hendersoni | 19 |
| Lanx klamathensis Hannibal, 1912 | Lanx klamathensis | 19 |
| Lymnaea peregea unspecified | Lymnaea peregra | 95753 |
| Fossaria perplexa Baker & Henderson, 1929 | Fossaria perplexa | 19 |
| Fossaria sonomaensis Hemphill, 1906 | Fossaria sonomaensis | 19 |
| Fossaria vancouverensis Baker, 1939 | Fossaria vancouverensis | 19 |
| Stagnicola walkeriana Baker, 1926 | Stagnicola walkeriana | 19 |