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Guide to Achnanthidium laticephalum

H.Kobayasi 1997

A Latecephalum Guide Copy
Credit: Marina Potapova
  1. Valve ends broadly rostrate or subcapitate
  2. Central area absent on both valves
  3. Striae parallel or slightly radiate throughout both valves

Valves linear-lanceolate with broadly rostrate or subcapitate ends. The axial area is narrow and only slightly widened at the valve center. A central area is absent. The striae are parallel or slightly radiate throughout both valves, 20-26 in 10 μm in the center valve.