Navicula Harmoniae Guide
Credit: Loren Bahls
  1. Apices narrowly rounded
  2. Central area rhombic
  3. Central striae alternately long and short
  4. Central striae strongly radiate
  5. Distal striae parallel

Valves are lanceolate, with narrowly rounded apices. The central area is rhombic in shape. At the valve center, striae are strongly radiate and alternately long and short. At the apices, striae are parallel.