Gomphonema Caperatum Guide
Credit: Ian Bishop
  1. Valves linear-lanceolate
  2. Axial area wide
  3. Stigmoid present
  4. Valve slightly asymmetric to apical axis
  5. Surficial "wrinkles" visible in SEM

Valves are linear-lanceolate and may be slightly asymmetric to the apical axis. A single, isolated stigmoid is present. The axial area is broad and rhombic-lanceolate.