| Thalassiosira anguste-lineata (A. Schmidt) G.A. Fryxell & Hasle, 1977 |
| Thalassiosira antiqua (Grunow) Proshk. -Lavr., 1955 |
| Thalassiosira binata G.A. Fryxell, 1977 |
| Thalassiosira bioculata (Grunow) Ostenf., 1903 |
| Thalassiosira cedarkeyensis A.K.S. Prasad, 1993 |
| Thalassiosira condensata Cleve, 1900 |
| Thalassiosira curviseriata Takano, 1981 |
| Thalassiosira decipiens (Grunow) Jørg., 1905 |
| Thalassiosira delicatula Ostenf., 1908 |
| Thalassiosira diporocyclus Hasle, 1972 |
| Thalassiosira eccentrica (Ehrenb.) Cleve, 1903 |
| Thalassiosira echinata Sëmina, 1994 |
| Thalassiosira elsayedii G.A. Fryxell, 1975 |
| Thalassiosira endoseriata Hasle & G.A. Fryxell, 1977 |
| Thalassiosira exigua G.A. Fryxell & Hasle, 1977 |
| Thalassiosira ferelineata Hasle & G.A. Fryxell, 1977 |
| Thalassiosira gracilis (G. Karst.) Hust., 1958 |
| Thalassiosira gracilis var. expecta G.A. Fryxell & Hasle, 1979 |
| Thalassiosira gravida Cleve, 1896 |
| Thalassiosira hendeyi Hasle & G.A. Fryxell, 1977 |