Van Heurck -- Synopsis des Diatomées de Belgique -- Index
| Actinoptychus | adriaticus Grunow ? | Page -- | Plate 121 | Figure 4 | |
| Actinoptychus | adriaticus var. balearica Grunow | Page -- | Plate 121 | Figure 2 | |
| Actinoptychus | adriaticus var. ? pumila Grunow | Page -- | Plate 121 | Figure 3 | |
| Actinoptychus ? | annulatus (G.C. Wall.) Grunow | Page -- | Plate 124 | Figure 14 | Note 4 |
| Actinoptychus ? | annulatus var. ? minor Grunow | Page -- | Plate 124 | Figure13 | Note 5 |
| Actinoptychus | biternarius Ehrenb. = Actinoptychus undulatus Ehrenb. | Page 210 | Plate 122 | Figure1,3 | |
| Actinoptychus | biternarius Ehrenb. = Actinoptychus undulatus Ehrenb. | Page 210 | Plate 22bis | Figure14 | |
| Actinoptychus | capensis Grunow | Page -- | Plate 121 | Figure 1 | |
| Actinoptychus | glabratus Grunow | Page -- | Plate 120 | Figure 6 | |
| Actinoptychus | glabratus var. angelorum Grunow | Page -- | Plate 120 | Figure 9 | |
| Actinoptychus | glabratus var. incisa Grunow | Page -- | Plate 120 | Figure 8 | |
| Actinoptychus | glabratus var. montereyi Grunow | Page -- | Plate 120 | Figure 7 | |
| Actinoptychus | halionyx Grunow = Actinoptychus splendens var. halionyx Grunow ? | Page -- | Plate 119 | Figure 3 | |
| Actinoptychus | heliopelta Grunow | Page -- | Plate 123 | Figure 3 | |
| Actinoptychus | hispidus Grunow | Page -- | Plate 123 | Figure 2 | |
| Actinoptychus | irregularis Grunow | Page -- | Plate 132 | Figure11 | |
| Actinoptychus | janischii Grunow | Page -- | Plate 122 | Figure 6 | |
| Actinoptychus | laevigatus Grunow | Page -- | Plate 122 | Figure7 | |
| Actinoptychus | pellucidus Grunow | Page -- | Plate 123 | Figure1 | |
| Actinoptychus ? | pulchellus Grunow | Page -- | Plate 123 | Figure 5 | |
| Actinoptychus | radiolatus Grunow | Page -- | Plate 122 | Figure 5 | |
| Actinoptychus | spiniferus Grunow | Page -- | Plate 121 | Figure 5,6 | |
| Actinoptychus | splendens (Shadbolt) Ralfs | Page 211 | Plate 119 | Figure1,2,4 | |
| Actinoptychus | splendens var. ? glabratus Grunow = Actinoptychus glabratus Grunow | Page -- | Plate 120 | Figure 6 | |
| Actinoptychus | splendens var. californica Grunow | Page -- | Plate 120 | Figure 1 | |
| Actinoptychus | splendens var. crucifera Grunow | Page -- | Plate 120 | Figure 2 | |
| Actinoptychus | splendens var. halionyx Grunow | Page -- | Plate 120 | Figure 3,5 | |
| Actinoptychus | splendens var. halionyx Grunow | Page -- | Plate 119 | Figure3 | |
| Actinoptychus | splendens var. nicobarica Grunow | Page -- | Plate 120 | Figure 4 | |
| Actinoptychus | undulatus Ehrenb. | Page 210 | Plate 22bis | Figure14 | |
| Actinoptychus | undulatus Ehrenb. | Page 210 | Plate 122 | Figure1,3 | |
| Actinoptychus | undulatus var. microsticta Grunow | Page -- | Plate 122 | Figure 4 | |
| Actinoptychus | undulatus var. microsticta f. sexappendiculata Grunow | Page -- | Plate 122 | Figure 2 | |
| Actinoptychus | vulgaris var. australis Grunow | Page -- | Plate 121 | Figure8 | |
| Actinoptychus | vulgaris var. monicae Grunow | Page -- | Plate 121 | Figure 9 | |
| Actinoptychus | vulgaris var. ? spiniferus Grunow = Actinoptychus spiniferus Grunow | Page -- | Plate 121 | Figure 5,6 | |
| Actinoptychus | vulgaris var. virginica Grunow | Page -- | Plate 121 | Figure7 |