Van Heurck -- Synopsis des Diatomées de Belgique -- Index
| Sphenella | angustata Kütz. = Gomphonema angustatum (Kütz.) Rabenh. | Page -- | Plate 24 | Figure 49,50 | |
| Sphenella | naviculoides Hantzsch = Gomphonema angustatum (Kütz.) Rabenh. | Page -- | Plate 24 | Figure 49,50 | |
| Sphenella | obtusata Kütz. = Gomphonema obtusata (Kütz.) Grunow | Page -- | Plate 24 | Figure 44,45 | |
| Sphenella | parvula Kütz. = Gomphonema parvulum (Kütz.) Kütz. | Page -- | Plate 25 | Figure 9 | |
| Sphenella | vulgaris Kütz. = [?] Gomphonema olivaceum var. vulgaris Grunow | Page 126 | Plate 25 | Figure 21 | Note 211 |