Cyclotella Radiosa Guide
Credit: Loren Bahls
  1. Central areolae in radial rows
  2. Central areolae coarse
  3. Marginal striae occupy about half valve radius
  4. Marginal striae with shadow lines

Valves are concentrically undulate and radially wrinkled. The central areolae are coarse, equal in size and arranged in radial rows. Marginal striae have shadow lines and occupy about half of the valve radius.