Van Heurck -- Synopsis des Diatomées de Belgique -- Index
| Actinocyclus ? | alienus var. arctica Grunow | Page -- | Plate 125 | Figure12 | |
| Actinocyclus ? | alienus var. californica Grunow | Page -- | Plate 125 | Figure10 | |
| Actinocyclus | australis Grunow? | Page -- | Plate 125 | Figure7,8 | |
| Actinocyclus | barkleyi (Ehrenb.) Grunow? | Page -- | Plate 124 | Figure12 | |
| Actinocyclus | crassus (W.Sm.) Ralfs | Page 215 | Plate 124 | Figure 6,8 | |
| Actinocyclus | ehrenbergii Ralfs | Page 215 | Plate 123 | Figure7 | |
| Actinocyclus | ehrenbergii Ralfs var. ? | Page -- | Plate 125 | Figure1 | |
| Actinocyclus | ehrenbergii var. intermedia Grunow | Page -- | Plate 124 | Figure5 | |
| Actinocyclus | ellipticus Grunow ? | Page -- | Plate 124 | Figure10 | |
| Actinocyclus ? | elongatus Grunow | Page -- | Plate 125 | Figure15 | |
| Actinocyclus | elongatus var. dubia Grunow ? | Page -- | Plate 125 | Figure16,17 | |
| Actinocyclus ? | incertus Grunow | Page -- | Plate 125 | Figure 4 | |
| Actinocyclus | janischii Schum. = Actinocyclus ehrenbergii Ralfs var. | Page -- | Plate 125 | Figure1 | |
| Actinocyclus | moniliformis Ralfs | Page -- | Plate 124 | Figure 9 | |
| Actinocyclus | oliverianus O'Meara = Podosira oliveriana (O'Meara) Grunow | Page -- | Plate 118 | Figure 5 | |
| Actinocyclus | ovalis Grunow = Actinocyclus roperii (Bréb.) Grunow | Page -- | Plate 125 | Figure 5,6 | |
| Actinocyclus | ovalis G. Norman ? | Page -- | Plate 124 | Figure11 | |
| Actinocyclus | partitus Grunow | Page -- | Plate 132 | Figure10 | |
| Actinocyclus | ralfsii (W.Sm.) Ralfs | Page 215 | Plate 123 | Figure 6 | |
| Actinocyclus | ralfsii var. australiensis f. major Grunow | Page -- | Plate 124 | Figure 4 | |
| Actinocyclus | ralfsii var. australiensis f. minor Grunow? | Page -- | Plate 124 | Figure 2 | |
| Actinocyclus | ralfsii var. monicae Grunow | Page -- | Plate 124 | Figure 3 | |
| Actinocyclus | ralfsii var. partitus Grunow = Actinocyclus partitus Grunow | Page -- | Plate 132 | Figure10 | |
| Actinocyclus | ralfsii var. samoensis Grunow | Page -- | Plate 124 | Figure1 | |
| Actinocyclus | roperii (Bréb.) Grunow? | Page -- | Plate 125 | Figure 5,6 | |
| Actinocyclus | semiocellatus Schum. ? = Actinocyclus moniliformis Ralfs | Page -- | Plate 124 | Figure 9 | |
| Actinocyclus ? | stictodiscus Grunow (genus novum ?)? | Page -- | Plate 118 | Figure 4 | |
| Actinocyclus | subtilis (W.Greg.) Ralfs | Page 216 | Plate 124 | Figure 7 | |
| Actinocyclus | subtilis f. major Grunow ? | Page -- | Plate 125 | Figure11 | |
| Actinocyclus | subtilis f. minor Grunow | Page -- | Plate 125 | Figure 9 | |
| Actinocyclus | tenuissimus Cleve | Page -- | Plate 125 | Figure 2 | |
| Actinocyclus | tenuissimus var. australiensis Grunow | Page -- | Plate 125 | Figure 3 |