Diatoms of North AmericaDiatoms of North America
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Guide to Pinnularia perinterrupta

Krammer 2000

Pinnularia perinterrupta guide
  1. Ends broadly capitate
  2. Fascia broad
  3. Central striae radiate
  4. Distal striae convergent

Valves linear with broadly capitate, rounded ends. central area widened into a broad, bow-tie shaped fascia. Striae strongly radiate in the center, becoming strongly convergent near the apices.