Diatoms of North AmericaDiatoms of North America
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Guide to Gomphonema johnsonii

Bahls 2013

Gomphonema Johnsonii Guide
Credit: Loren Bahls
  1. Valves lanceolate
  2. Apices narrow, subapiculate
  3. Striae radiate
  4. Stigmoid present
  5. Central area moderately large

This taxon has lanceolate valves with narrow subapiculate apices. Striae are radiate and more widely spaced near the valve center. A stigmoid is present at the end of the longest central stria. The central area is moderately large.