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Guide to Navicula hodgeana

R.M.Patrick and Freese 1961

Navicula Hodgeana Guide
Credit: Paul Hamilton
  1. Valves linear to elliptic-linear
  2. Isolated row of areolae
  3. Raphe curving, filiform
  4. Fine hyaline line near valve margin

Valves are linear to elliptic-linear, with narrowing rounded apices. The “H-shaped” hyaline area immediately adjacent to the axial area is narrow, with a single areola associated with each stria. The axial area is curved and elevated from the valve face, with a disruption between the proximal raphe ends. The proximal raphe ends are tear-drop shaped. There is a fine hyaline line extending along the valve margin from apex to apex. Only 3–5 areolae comprise the stria from the valve margin to the hyaline “H-shaped” zone.