Cyclotella Meneghiniana Guide
Credit: Ian Bishop
  1. Valve face flat or transversely undulate
  2. Central fultoportulae 1-4
  3. Marginal spines may be present

The valve face is flat, or transversely undulate. The central area contains 1-4 fultoportulae. Spines may be present on the valve margin, positioned at the end of each costa.