Sellaphora Saugerresii Guide
Credit: Alison Minerovic
  1. Valves linear-elliptic to linear-lanceolate
  2. Central area wide, more or less symmetric, bow-tie shaped
  3. Striae radiate at central valve, becoming parallel near poles
  4. Striae biseriate

Valves are small, with rounded ends. The central area is wide, more or less symmetric and bow-tie shaped. Striae are radiate at the central valve, becoming parallel at the poles. Striae are 20-22 in 10 ┬Ám. Areolae are not resolvable under LM, but form biseriate striae. Polar bars are absent.