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Guide to Craticula ambigua

(Ehrenb.) D.G.Mann 1990

Craticula Ambigua Guide
Credit: Gina LaLiberte
  1. Valves large
  2. Apices rostrate to subcapitate
  3. Axial area narrow

Valves are large and lanceolate, with rostrate apices. Striae are slightly radiate, becoming convergent near the ends. The axial area is narrow and slightly expanded in the central area.