Van Heurck -- Synopsis des Diatomées de Belgique -- Index
| Orthosira | angulata W.Greg. = Coscinodiscus decipiens Grunow | Page -- | Plate 91 | Figure 10 | |
| Orthosira | dickiei Thwaites = Melosira dickiei (Thwaites) Kütz. | Page 200 | Plate 90 | Figure 10,11,12,15,16 | |
| Orthosira | marina W.Sm. = Melosira sulcata (Ehrenb.) Kütz. | Page 201 | Plate 91 | Figure 16 | |
| Orthosira ? | sculpta (Ehrenb.)?Grunow = Melosira sculpta (Ehrenb.) Kütz. | Page -- | Plate 91 | Figure 13,14 | |
| Orthosira | sol.? (Ehrenb.) Grunow = Melosira sol (Ehrenb.) Kütz. | Page -- | Plate 91 | Figure 7,8,9 | |
| Orthosira | spinosa Grev. = Melosira roeseana var. epidendron (Ehrenb.) Grunow | Page -- | Plate 89 | Figure 17,18 | |
| Orthosira | spinosa W. Sm. = Melosira roeseana Rabenh. | Page 199 | Plate 89 | Figure 1,2,3,4,5,6 |