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Guide to Stephanodiscus parvus

Stoermer and Håk. 1984

Stephanodiscus Parvus Guide
Credit: David Burge
  1. Valve face flat to slightly undulate
  2. Fultoportula eccentric
  3. Valves small
  4. Fascicles distinctly punctate

Valves are small, with a flat to slightly undulate valve face. A distinct central fultoportula is eccentric to the valve center. Fascicles are composed of distinct areolae, which are uniseriate at the valve center and may biseriate at the margin. A spine is present at each interfascicle on the valve margin.