Cymbella Rainieriensis Guide
Credit: Loren Bahls
  1. Valves lanceolate
  2. Apices weakly protracted, apiculate or rostrate
  3. Areolae 28-34 in 10 µm
  4. Raphe lateral
  5. Central area rhomboid

Valves are slightly dorsiventral valves with weakly protracted apiculate, or rostrate, apices. Valves are 13-16 µm wide. The central area is rhomboid. The raphe is lateral. Areola density is 28-34 in 10 µm.