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Guide to Gomphonema nathorstii

Foged 1964

Gomphonema Nathorstii Guide
Credit: Loren Bahls
  1. Valves triundulate
  2. Headpole rostrate to subcapitate
  3. Valves >8 µm wide

Valves are clavate and triundulate. The headpole is narrow, and rostrate to subcapitate. Valves are greater than 8 µm wide.