| Nominal Species (n = 5) | Present allocation (n = 2) | Ref. |
|---|---|---|
| Spongomorpha arcta var. Limitanea F.S.Collins, 1911 | Spongomorpha mertensii | 3477 |
| Acrosiphonia mertensii Yendo, 1916 | Spongomorpha mertensii | 3477 |
| Conferva mertensii Ruprecht, 1850 | Spongomorpha mertensii | 3477 |
| Spongomorpha ochotensis Tokida, 1932 | Spongomorpha mertensii | 3477 |
| Conferva saxatilis Ruprecht, 1850 | Acrosiphonia saxatilis | 80701 |