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Guide to Stauroneis submarginalis

Bahls 2010

Stauroneis Submarginalis Guide
Credit: Loren Bahls
  1. Valves broadly lanceolate, 140-186 µm long
  2. Longitudinal submarginal line near valve/mantle junction
  3. Apices slightly protracted
  4. Proximal raphe ends curved

Stauroneis submarginalis has broadly lanceolate valves, 140 to 186 µm long, with slightly protracted and broadly rounded apices. A distinct longitudinal line, visible in LM, runs the length of the valve 2-3 µm inside the valve margins. Proximal raphe ends are curved.