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Guide to Cyclostephanos invisitatus

(M.H.Hohn and Hellermann) E.C.Ther., Stoermer and Håk. 1998

Cyclostephanos Invisitatus Guide
Credit: David Burge, Mark Edlund
  1. Valve face flat
  2. Striae originate from central annulus
  3. Striae and areolae fine
  4. Spines on every interfasicle

Valves are discoid, with a flat valve face. Striae are fine and uniseriate in the valve center, becoming multiseriate at the valve margin. Short, spathulate spines are present.