Mesotaeniaceae
| Mesotaeniaceae | |
|---|---|
| Cylindrocystis brebissonii | |
| Scientific classification | |
| Kingdom: | Plantae | 
| Class: | Zygnematophyceae | 
| Order: | Zygnematales | 
| Family: | Mesotaeniaceae Oltmanns | 
| Genera | |
| 
 | |
The Mesotaeniaceae are a small family of unicellular green algae known as the "saccoderm desmids". The Mesotaeniaceae appear to be sister or ancestral to the Zygnemataceae. The desmids are a deep branching group of Zygnemataceae. Spirotaenia was found to be a basal green alga.