| Synonym | Author | CoL Status | Valid | Synonymy | Combination |
|---|---|---|---|---|---|
| Acrosiphonia mertensii | Yendo, 1916 | synonym | No | senior synonym |
original combination |
| Acrosiphonia ochotensis | (Tokida) Vinogradova, 1979 | synonym | No | junior synonym |
new combination |
| Cladophora mertensii | (Yendo) De Toni, 1889 | synonym | No | senior synonym |
new combination |
| Conferva mertensii | Ruprecht, 1850 | synonym | No | senior synonym |
original combination |
| Spongomorpha arcta var. Limitanea | F.S.Collins, 1911 | synonym | No | junior synonym |
original combination |
| Spongomorpha mertensii | (Yendo) Setchell & N.L.Gardner, 1920 | accepted name | Yes | senior synonym |
new combination |
| Spongomorpha ochotensis | Tokida, 1932 | synonym | No | junior synonym |
original combination |