| Order | Family | Genus | Species |
|---|---|---|---|
| Achnanthales | 0 | 0 | 1 |
| Amblyamphorales | 1 | 1 | 0 |
| Bacillariales | 2 | 19 | 659 |
| Cocconeidales | 2 | 33 | 126 |
| Cymbellales | 6 | 38 | 283 |
| Diadesmidales | 1 | 2 | 21 |
| Diploneidales | 1 | 2 | 54 |
| Eunotiales | 1 | 11 | 53 |
| Lyrellales | 1 | 2 | 5 |
| Mastogloiales | 2 | 8 | 77 |
| Naviculales | 8 | 55 | 585 |
| Sellaphorales | 2 | 17 | 253 |
| Surirellales | 2 | 26 | 328 |
| Thalassiophysales | 2 | 2 | 8 |