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Guide to Cymbella alpestris

Krammer 2002

Cymbella Alpestris Guide
Credit: Loren Bahls
  1. Valves up to 70 µm long
  2. Stigmata lacking
  3. Proximal raphe ends reverse-lateral
  4. Striae 8-12 in 10 µm
  5. Areolae 20-25 in 10 µm

Valves are dorsiventral and large, up to 70 µm long. The central area is small and isolated stigmata are absent. Proximal raphe ends are reverse-lateral and deflected ventrally. Striae number 8-12 in 10 µm and areolae number 20-25 in 10 µm.