Stauroneis Finlandia Guide
Credit: Loren Bahls
  1. Valves broadly lanceolate
  2. Pseudosepta present
  3. Proximal raphe ends strongly curved

Stauroneis finlandia has large lanceolate valves with subrostrate apices and prominent pseudosepta. The proximal raphe ends are strongly curved and expanded. The width may be greater than 30 ┬Ám.