| Class | Genus | Species No. | Strain No. |
|---|---|---|---|
| Trebouxiophyceae | Nannochloris | 3 | 5 |
| Eustigmatophyceae | Nannochloropsis | 3 | 3 |
| Florideophyceae | Nemalionopsis | 1 | 43 |
| Sarcomonadea | Neoheteromita | 2 | 2 |
| Nephroselmidophyceae | Nephroselmis | 7 | 20 |
| Charophyceae | Netrium | 1 | 2 |
| Charophyceae | Nitella | 10 | 24 |
| Charophyceae | Nitellopsis | 1 | 2 |
| Bacillariophyceae | Nitzschia | 3 | 16 |
| Cyanophyceae | Nodularia | 1 | 1 |
| Chlorarachniophyceae | Norrisiella | 1 | 1 |
| Cyanophyceae | Nostoc | 7 | 19 |
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