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Guide to Navicula lanceolata

(C.Agardh) Ehrenb. 1838

N Lanceolata Guide
Credit: Marina Potapova
  1. Valve margin lanceolate, broad in the central valve and slightly rostrate, rounded ends
  2. Central area an irregular oval
  3. Striae radiate, except at the ends where they become convergent

Valves lanceolate with rounded ends. Striae radiate through most of the valve, becoming convergent at the ends. Central area is a somewhat rounded rectangle, or it may be square or irregular (asymmetric). The proximal raphe ends are are rather distantly placed from one another.