Van Heurck -- Synopsis des Diatomées de Belgique -- Index
| Cylindrotheca | gerstenbergeri Rabenh. = Cylindrotheca gracilis (Bréb.) Grunow | Page 186 | Plate 80 | Figure 2 | |
| Cylindrotheca | gracilis (Bréb.) Grunow | Page 186 | Plate 80 | Figure 2 | |
| Cylindrotheca | gracilis var. major Grunow | Page -- | Plate 80 | Figure 1 |