| Order | Family | Genus | Species |
|---|---|---|---|
| Achnanthales | 0 | 0 | 1 |
| Bacillariales | 1 | 15 | 655 |
| Cocconeidales | 2 | 12 | 93 |
| Cymbellales | 5 | 26 | 283 |
| Eunotiales | 1 | 3 | 53 |
| Lyrellales | 1 | 2 | 5 |
| Mastogloiales | 2 | 9 | 91 |
| Naviculales | 15 | 67 | 995 |
| Rhopalodiales | 1 | 3 | 32 |
| Surirellales | 2 | 9 | 93 |
| Thalassiophysales | 2 | 4 | 108 |