Diatoms of North AmericaDiatoms of North America
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Guide to Cymbella stigmaphora

Østrup 1910

Cymbella Stigmaphora Guide
Credit: Loren Bahls
  1. Valves rhombic-lanceolate
  2. Axial area wide
  3. Valves typically >9 µm wide
  4. Striae 9-14 in 10 µm

Valves are rhombic-lanceolate and mostly more than 9 µm wide. Striae number 9-14 in 10 µm and areolae number 22-26 in 10 µm. Stigmata are absent.