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Guide to Achnanthidium duthiei

(Sreen.) Edlund 1994

A Duthiei Guide Copy
Credit: Marina Potapova
  1. Valves linear to linear-lanceolate
  2. Valve ends broadly capitate
  3. Striae parallel or slightly radiate throughout both valves

Valves linear to linear-lanceolate with broadly capitate ends.The striae are parallel or very slightly radiate throughout both valves. Striae density on both valves is 14-22 in 10 µm in the middle and 28-34 in 10 µm at the apices.