Cymbella Excisiformis Guide
Credit: Marina Potapova
  1. Valves dorsiventral
  2. Valves 6.1-7.1 μm wide
  3. Central area indistinct
  4. Stigma present
  5. Areolae distinct

Valves are dorsiventral, with subrostrate to subcapitate apices. The dorsal margin is strongly arched, whereas the ventral margin is flat or slightly gibbous. The central area is indistinct. One stigma is present at the end of a middle stria. The areolae are usually distinct under LM.