| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Siriella Dana 1850 | 0 | 0 | 0 |
| Solenocera Lucas 1849 | 0 | 0 | 1 |
| Solmissus Haeckel 1879 | 0 | 0 | 1 |
| Solmundella Haeckel 1879 | 0 | 0 | 1 |
| Sonoda | 0 | 0 | 1 |
| Sooporanga | 0 | 0 | 1 |
| Spenceriella Michaelsen 1907 | 0 | 0 | 1 |
| Sphaeronectes Huxley 1859 | 0 | 0 | 1 |
| Sphaerozoum Meyen 1834 | 0 | 0 | 1 |
| Sphagemacrurus | 0 | 0 | 1 |
| Spiniphryne | 0 | 0 | 1 |
| Spiochaetopterus M. Sars 1856 | 0 | 0 | 0 |
| Spirobolellus | 0 | 0 | 1 |
| Spirula | 0 | 0 | 1 |
| Squaliolus | 0 | 0 | 1 |
