Diatoms of North AmericaDiatoms of North America
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Guide to Cymbella tumida

(Bréb. ex Kütz.) Van Heurck 1880

Cymbella Tumida Guide
  1. Valves strongly asymmetric
  2. Apices protracted
  3. Raphe lateral
  4. Striae coarse

Valves are strongly asymmetric. Apices are strongly protracted and the raphe is lateral. The striae are coarse, radiate, and irregularly bent. A single, distinct stigma is present.