| species |
Thalassionema antiqua Schrader, 1973 |
accepted |
| species |
Thalassionema bacillare (Heiden) Kolbe, 1955 |
accepted |
| species |
Thalassionema bacillaris Hust. |
accepted |
| species |
Thalassionema bifurcum Kato & Suto, 2019 |
accepted |
| species |
Thalassionema claviformis Schrader, 1973 |
accepted |
| species |
Thalassionema curvatum Kisselev, 1935 |
accepted |
| species |
Thalassionema elegans Hustedt, 1958 |
accepted |
| species |
Thalassionema frauenfeldii (Grunow) Hallegraeff, 1986 |
accepted |
| species |
Thalassionema gelida |
accepted |
| species |
Thalassionema kuroshioensis Sugie & Ko.Suzuki, 2015 |
accepted |
| species |
Thalassionema laevis (Kützing) Ralfs |
accepted |
| species |
Thalassionema lineatum Jousé, 1971 |
accepted |
| species |
Thalassionema nitzschioides (Grunow, 1862) Van Heurck, 1896 |
accepted |
| species |
Thalassionema pseudonitzschioides (Schütt & Schrader) Hasle |
accepted |
| species |
Thalassionema robusta Schrader, 1973 |
accepted |
| species |
Thalassionema schraderi Akiba, 1982 |
accepted |
| species |
Thalassionema schraderi Hust. |
doubtful |
| species |
Thalassionema synedriforme (Greville) Hasle, 1999 |
accepted |