Navicula Cryptocephaloides Guide
Credit: Loren Bahls
  1. Valves lanceolate
  2. Apices acutely rounded, weakly protracted
  3. Proximal raphe ends straight
  4. Central striae radiate and straight
  5. Areolae about 24 in 10 ┬Ám

Valves are lanceolate, with acutely rounded and weakly protracted apices. The proximal raphe ends are straight. The central striae are radiate and straight. Areolae within the striae are relatively coarse and easily resolved in LM.