| Tabellaria | |
|---|---|
| Tabellaria fenestrata | |
| Scientific classification | |
| Domain: | Eukaryota |
| Supergroup: | Stramenopiles |
| Division: | Ochrophyta |
| Clade: | Bacillariophyta |
| Class: | Fragilariophyceae |
| Order: | Tabellariales |
| Family: | Tabellariaceae |
| Genus: | Tabellaria Ehrenberg ex F.T.Kützing |

Tabellaria is a genus of freshwater diatoms. They are cuboid in shape, and the frustules (siliceous cell walls) are attached at the corners so that the colonies assume a zigzag shape.