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Guide to Eunotia bidentula

W.Sm. 1856

Eunotia Bidentula Guide
Credit: Ian Bishop
  1. Ventral margin straight
  2. Dorsal margin biundulate
  3. Apicies sub-capitate to capitate
  4. Helictoglossae at ventral margin

Ventral margin is straight, becoming slightly concave in the smallest specimens. Dorsal margins are distinctly biundulate, with two rounded crests. Apices are slightly protracted, sub-capitate to capitate on the dorsal margin and straight on the ventral margin. Helictoglossae are distinct and positioned on the valve face at the ventral margin.