Encyonopsis Robusta Guide
  1. Valves linear to linear-lanceolate
  2. Apices capitate
  3. Striae 19-22 in 10 µm
  4. Central area round and small
  5. Valves mostly <20 µm long

Valves are linear to linear-lanceolate, generally less than 20 µm long with capitate apices. The central area is small and round. Striae number 19-22 in 10 µm.