Diatoms of North AmericaDiatoms of North America
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Guide to Cymbopleura frequens

Krammer 2003

Cymbopleura Frequens Guide
Credit: Loren Bahls
  1. Valves lanceolate
  2. Apices apiculate to rostrate
  3. Central area reduced
  4. Apices straight, not tipped ventrally

Valves are lanceolate with apiculate to rostrate apices. The central area is greatly reduced, or absent. The apices are straight, rather than tipped toward the ventral margin.