Diatoms of North AmericaDiatoms of North America
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Guide to Pinnularia scotica

Krammer 2000

Pinnularia Scotica Guide
  1. Valves triundulate
  2. Apices bluntly capitate
  3. Valve surface mottled
  4. Striae marginal

Valves tridunulate with blunt, capitate apices. The valve surface is mottled. The axial area is broad, with marginal striae.