Navicula Notha Guide
Credit: Marina Potapova
  1. Valve lanceolate to linear-lanceolate
  2. Central area small
  3. Proximal raphe ends deflected to primary side
  4. Striae radiate and bent at center
  5. Striae convergent at apices

Valves are lanceolate to linear-lanceolate with slightly drawn-out ends. Valves are 4.1-5.5 μm wide. Axial area is narrow, central area is small, rhomboid to elliptical. Proximal raphe ends are noticeably deflected to the primary side. Striae are radiate and bent at valve center, convergent at apices, 14-17 in 10 μm. There are 36-40 lineolae in 10 μm.