| Shionodiscus endoseriatus (Hasle & G.A. Fryxell) A.J. Alverson, S-H. Kang & E.C. Theriot, 2006 |
| Shionodiscus gracilis (Karsten) A.J. Alverson, S-H. Kang & E.C. Theriot, 2006 |
| Shionodiscus gracilis var. expectus (VanLandingham) A.J. Alverson, S-H. Kang & E.C. Theriot, 2006 |
| Shionodiscus oestrupii (Ostenf.) A.J. Alverson, S.H. Kang & E.C. Theriot, 2006 |
| Shionodiscus oestrupii var. venrickiae (G.A. Fryxell & G.R. Hasle) A.J. Alverson, S.H. Kang & E.C. Theriot, 2006 |
| Shionodiscus poro-irregulatus (Hasle & Heimdal) A.J. Alverson, S-H. Kang & E.C. Theriot, 2006 |
| Thalassiosira Cleve, 1873 |
| Thalassiosira aestivalis Gran, 1931 |
| Thalassiosira alleni Tanako, 1965 |
| Thalassiosira angulata (W. Greg.) Hasle, 1978 |
| 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 |