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Guide to Fragilaria crotonensis

Kitton 1869

Fragilaria Crotonensis Guide
Credit: Barry Rosen, Eduardo Morales, Sarah Spaulding
  1. Valves lanceolate
  2. Colonies ribbon-like
  3. Central valve margin inflated
  4. Spines present

Valves are lanceolate, with an inflated central margin. Valve apices are rounded to capitate. Spines are positioned on the margin, a spine present at the end of a stria. Frustules are joined in ribbon-like colonies.