Diatoms of North AmericaDiatoms of North America
Return to overview

Guide to Pinnularia marchica

Schönfelder in Krammer 2000

Pinnularia Marchica Guide
Credit: Marina Potapova
  1. Valves linear to elliptic-lanceolate
  2. Apices rostrate to slightly capitate
  3. Central area large, reaching valve margin
  4. Striae radiate near valve center

Valves are linear to elliptic-lanceolate. The apices are rostrate to slightly subcapitate. Valves are 4-5 µm in width. The axial area is lanceolate, widening into a large central area that extends to the valve margin. Striae are radiate near the valve center and slightly convergent near the apices.