Diatoms of North AmericaDiatoms of North America
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Guide to Stauroneis americana

Heiden in Schmidt et al. 1903

Stauroneis Americana Guide
Credit: Loren Bahls
  1. Valves large
  2. Pseudosepta present
  3. Proximal raphe ends straight
  4. Stauros rectangular
  5. Striae slightly radiate

Stauroneis finlandia, S. javanica, S. kishinena and S.ursamaioris have proximal raphe ends that are strongly curved and expanded. Stauroneis finlandia and S. ursamaioris have distinctly protracted valve apices.