Cocconeis Klamathensis Guide
Credit: Pat Kociolek
  1. Raphe valve with hyaline lines
  2. Areolae dash-like, offset

Valves are elliptic and strongly arched about the apical axis. On the raphe valve, a curved hyaline area is present on either side of the axial area. Striae are fine, punctate and radiate. On the rapheless valve, the central sternum is narrowly lanceolate. The areolae are dash-like and offset from one another.