Sellaphora Bacilloides Guide
Credit: Loren Bahls
  1. Valves elliptic
  2. Apices subtly protracted
  3. Valves 30-35 µm in length
  4. Striae 18 in 10 µm in the center, 26 in 10 µm at the ends

Sellaphora bacilloides has elliptic valves with bluntly rounded, subtly protracted apices.