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

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