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Guide to Cocconeis cascadensis

Stancheva 2018

Cocconeis Cascadensis Guide
  1. Raphe valve with bumps on submarginal hyaline area
  2. Rapheless valve with large areolae

The raphe valve possesses a submarginal hyaline area, bearing apically elongated bumps. The rapheless valve has large, coarse areolae (less than 12 in 10 µm).