Van Heurck -- Synopsis des Diatomées de Belgique -- Index
| Bacteriastrum | varians Lauder = Chaetoceros varians (Lauder) Van Heurck | Page 195 | Plate 80 | Figure 3,4,5 | Note 14 |
| Bacteriastrum | varians Lauder = Chaetoceros varians (Lauder) Van Heurck | Page -- | Plate 82bis | Figure 10 |