Diatoms of North AmericaDiatoms of North America
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Guide to Luticola stigma

(R.M.Patrick) J.R.Johansen 2004

Luticola Stigma Guide
Credit: Ian Bishop
  1. Apices protracted
  2. Stigma distinct
  3. Central area with short, marginal striae

Valves with protracted apices. A single, distinct stigma is present, placed relatively close to the valve margin. Short, marginal striae, or isolated areolae, at the central area.