Navicula Vilaplanii Guide
Credit: Marina Potapova
  1. Valves linear-lanceolate
  2. Valves 2.5-3.3 μm wide
  3. Central area small
  4. Central striae strongly radiate
  5. Striae 20-24 in 10 μm

Valves are linear-lanceolate and narrow, with very slightly protracted apices. The central area is small. Striae are strongly radiate around the center, becoming convergent at the apices. The areolae are indistinguishable under LM.