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Guide to Stephanodiscus reimeri

E.C.Ther. and Stoermer 1992

Stephanodiscus Reimeri Guide
Credit: Sarah Spaulding
  1. Valves large, robust
  2. Areolae trapezoidal to sub-hexagonal
  3. Radial areolae 8-12 in 10 µm
  4. Marginal spines spaced every 2-3 costae

Valves are disc-shaped with a concentrically undulate face. Areolae are large, trapezoidal to sub-hexagonal in shape and arranged in fascicles that radiate outward from the valve center. Areolae along the radius number 8-12 in 10 µm. Marginal spines are located at the end of every two to three costae, just inside the valve face margin.