Discostella Pseudostelligera Guide
Credit: Rex Lowe
  1. Valves extremely small
  2. Central valve flat, concave or convex
  3. Central ornamentation present or absent
  4. Marginal fultoportulae evident
  5. Fultoportulae may possess projecting tubes and/or hoods

Valves are extremely small, less than 10 µm in diameter. The central valve may be flat, concave or convex. Ornamentation in the central valve may be absent, or there may be a stellate ornamentation. Marginal fultoportulae are evident in LM. These fultoportulae may possess externally projecting tubes and/or hoods.