| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Cladophorales | 1 | 12 | 0 |
| Clathrulinidae | 1 | 1 | 0 |
| Closteriaceae | 17 | 64 | 0 |
| Closterium acutum | 0 | 2 | 0 |
| Closterium acutum var. linea | 0 | 1 | 0 |
| Closterium closteroides | 0 | 2 | 0 |
| Closterium costatum Corda ex Ralfs 1848 | 0 | 2 | 0 |
| Closterium directum var. directum W. Archer 1862 | 0 | 3 | 0 |
| Closterium gracile Brébisson ex Ralfs 1848 | 0 | 1 | 0 |
| Closterium incurvum | 0 | 3 | 0 |
| Closterium kuetzingii Brébisson 1856 | 0 | 2 | 0 |
| Closterium lunula | 0 | 12 | 0 |
| Closterium lunula | 0 | 12 | 0 |
| Closterium moniliferum | 0 | 12 | 0 |
| Closterium moniliferum var. submoniliferum | 0 | 4 | 0 |
