| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Symbiochlorum hainanensis | 0 | 0 | 1 |
| Synchroma | 0 | 0 | 1 |
| Synura Ehrenberg 1834 | 0 | 0 | 2 |
| Synurophyceae | 0 | 0 | 1 |
| Synuropsis J. Schiller 1929 | 0 | 0 | 2 |
| Syssomonas multiformis | 0 | 0 | 1 |
| Teilingia Bourrelly 1964 | 0 | 0 | 1 |
| Telonemia | 0 | 0 | 1 |
| Telonemida | 0 | 0 | 1 |
| Temnogametum West & G. S. West 1897 | 0 | 0 | 1 |
| Tetrabaenaceae | 0 | 0 | 2 |
| Tetrachrysis A. J. Dop 1980 | 0 | 0 | 1 |
| Tetraciella Pascher & Petrová 1930 | 0 | 0 | 1 |
| Tetradesmus G. M. Smith 1913 | 0 | 0 | 2 |
| Tetraedron Kützing 1845 | 0 | 0 | 1 |
