Nitzschia Acidoclinata Guide Aac
  1. Valves linear
  2. Valves < 3 µm wide
  3. Central nodule present
  4. Striae 31-33 in 10 µm
  5. Apices rostrate to subcapitate

Valves are linear and narrow, < 3 µm wide. Apices are rostrate to subcapitate. A gap between two median fibulae is present on most valves. Striae number 31-33 in 10 µm.