Navicula Nunivakiana Guide
Credit: Paul Hamilton
  1. Valves lanceolate with rounded central margins
  2. Central area asymmetric
  3. Axial area wide
  4. Striae widely spaced

Valves are large and broadly lanceolate with rounded apices. The central area is asymmetric and distinct. The axial area is wide and somewhat irregular. Striae are widely spaced and areolae distinct in LM. The proximal raphe ends expand into a rounded terminal pore slightly curved to one side. The distal raphe fissures are scythe-shaped.