- Lioloma delicatulum (Cupp) Hasle, 1996
- Thalassionema bacillaris (Heiden & Kolbe) Kolbe, 1955 accepted as Spinigera bacillaris Heiden, 1928
- Thalassionema nitzschioides (Grunow) Mereschkowsky, 1902
- Thalassiothrix antarctica A.Schimper ex G.Karsten, 1905
- Thalassiothrix delicatula Cupp, 1943 represented as Lioloma delicatulum (Cupp) Hasle, 1996
- Thalassiothrix longissima Cleve & Grunow, 1880 (uncertain > unassessed)
- Trichotoxon reinboldii (Van Heurck) F.M.H.Reid & Round, 1988 accepted as Synedra reinboldii Van Heurck, 1909