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Guide to Stauroneis alabamae

Heiden 1903

Stauroneis alabamae guide
  1. Valves large
  2. Valves rhomibic
  3. Areolae scattered

Valves are large (115-150 µm). Valves are distinctly rhombic. The areolae are irregularly spaced across most of the valve face becoming more evenly spaced near the valve margins.