Van Heurck -- Synopsis des Diatomées de Belgique -- Index
| Thalassiothrix | elongata Grunow | Page -- | Plate 37 | Figure 9 | |
| Thalassiothrix | frauenfeldii Grunow | Page -- | Plate 37 | Figure 11,12 | |
| Thalassiothrix | frauenfeldii var. ? arctica Grunow | Page -- | Plate 37 | Figure 14 | |
| Thalassiothrix | frauenfeldii var. ? javanica Grunow | Page -- | Plate 37 | Figure 13 | |
| Thalassiothrix | frauenfeldii var. ? tenella Grunow | Page -- | Plate 37 | Figure 15 | |
| Thalassiothrix | longissima var. antarctica Cleve et Grunow | Page -- | Plate 37 | Figure 10 | |
| Thalassiothrix | marina (W.Greg. ?) Grunow | Page -- | Plate 37 | Figure 8 | |
| Thalassiothrix ? | nitzschioides Grunow = Synedra nitzschioides Grunow | Page 153 | Plate 43 | Figure 7,8,9,10 | |
| Thalassiothrix ? | nitzschioides var. javanica Grunow | Page -- | Plate 43 | Figure 11,12 | |
| Thalassiothrix ? | nitzschioides var. lanceolata Grunow = Synedra nitzschioides Grunow | Page -- | Plate 43 | Figure 8,9 | |
| Thalassiothrix ? | nitzschioides var. obtusa Grunow | Page -- | Plate 43 | Figure 6 |