Van Heurck -- Synopsis des Diatomées de Belgique -- Index
| Discoplea | astraea Ehrenb. = Stephanodiscus astraea (Ehrenb.) Grunow | Page -- | Plate 95 | Figure 5 | |
| Discoplea | comta Ehrenb. = Cyclotella comta (Ehrenb.) Kütz. | Page 214 | Plate 92 | Figure 16,17,18,19,20,21,22 | |
| Discoplea | oligactis Ehrenb. ? = Cyclotella comta (Ehrenb.) Kütz. | Page -- | Plate 93 | Figure 18 | |
| Discoplea | oregonica Ehrenb. = Stephanodiscus astraea var. minutula (Ehrenb.) Grunow | Page -- | Plate 95 | Figure 7,8 | |
| Discoplea | undulata Ehrenb. = Triceratium ehrenbergii Grunow | Page -- | Plate 115 | Figure 7,8 |