| Lioloma Hasle, 1996 |
| Lioloma delicatulum (Cupp) Hasle, 1996 |
| Lioloma elongatum (Grunow) Hasle, 1996 |
| Lioloma pacificum (Cupp) Hasle, 1996 |
| Thalassionema Grunow ex Mereschk., 1902 |
| Thalassionema bacillare (Heiden) Kolbe, 1955 |
| Thalassionema frauenfeldii (Grunow) Hallegr., 1986 |
| Thalassionema javanicum (Grunow) G.R. Hasle, 1996 |
| Thalassionema nitzschioides (Grunow) Mereschk., 1902 |
| Thalassionema nitzschioides var. capitulata (Grunow) Moreno |
| Thalassionema nitzschioides var. claviforme (Schrader) Moreno-Ruiz, 1993 |
| Thalassionema nitzschioides var. inflata Heiden, 1928 |
| Thalassionema nitzschioides var. lanceolata (Grunow) Heiden, 1928 |
| Thalassionema nitzschioides var. nitzschioides (Grunow) Mereschk., 1902 |
| Thalassionema nitzschioides var. obtusum (Grunow) Heiden, 1928 |
| Thalassionema nitzschioides var. parva Heiden, 1928 |
| Thalassionema pseudonitzschioides (G. Schuette & H.J. Schrad.) Hasle, 1996 |
| Thalassionemataceae Round, 1990 |
| Thalassiothrix Cleve & Grunow, 1880 |
| Thalassiothrix acuta G. Karst., 1906 |