Nitzschia Linearis Guide
Credit: Pat Kociolek
  1. Length 60-150 µm
  2. Striae 35-38 in 10 µm
  3. Central nodule distinct central

Valves are linear to linear-lanceolate, with sides parallel, except the side bearing the keel which is concave in the center. Apices rounded, nearly capitate. A distinct central nodule is present. Striae are resolvable.