Diatoms of North AmericaDiatoms of North America
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Guide to Gomphonema americobtusatum

E.Reichardt and Lange-Bert. 1999

Gomphonema Americobtusatum Guide
Credit: Loren Bahls
  1. Valves lanceolate, slightly heteropolar
  2. Apices obtuse, weakly protracted
  3. Striae 8-12 in 10 µm

Valves are lanceolate and only slightly heteropolar. The apices are obtusely rounded and may be weakly protracted. Striae number 8-12 in 10 µm.