Cymbella Cymbiformis Guide
Credit: Loren Bahls
  1. Valves large
  2. Apices bluntly rounded
  3. Stigmata 1-2
  4. Striae 6-9 in 10 µm

Valves are large with rounded, unprotracted apices. One or two stigmata are present. Striae number 6-9 in 10 µm on the center, dorsal valve.