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Guide to Cocconeis rugosa

Sovereign 1958

Cocconeis Rugosa Guide
Credit: Pat Kociolek
  1. Valves broadly elliptic
  2. Narrow, irregular hyaline lines present

Valves are broadly elliptic. The entire margin of the raphe valve is bordered by a hyaline rim. Striae are interrupted at the poles by narrow, irregular hyaline lines on both sides of the axial area.

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