| Order | Family | Genus | Species |
|---|---|---|---|
| Achnanthales | 0 | 0 | 1 |
| Bacillariales | 1 | 14 | 626 |
| Cocconeidales | 2 | 10 | 84 |
| Cymbellales | 5 | 23 | 274 |
| Eunotiales | 1 | 3 | 49 |
| Lyrellales | 1 | 2 | 5 |
| Mastogloiales | 2 | 6 | 77 |
| Naviculales | 15 | 65 | 954 |
| Rhopalodiales | 1 | 3 | 27 |
| Surirellales | 2 | 9 | 89 |
| Thalassiophysales | 2 | 4 | 106 |