Nitzschia Brevissima Guide
Credit: Pat Kociolek
  1. Valves broadly linear, distinctly to slightly sigmoid
  2. Apices protracted and narrowly rounded
  3. Striae are barely visible

Valves are broadly linear with concave, protracted margins. The valves are distinctly to slightly sigmoid, a shape produced by the ends being bent in opposite directions. The apices are narrowly rounded. The striae are barely visible.