Encyonema sinicum guide
  1. Valves large, up to 22 µm wide
  2. Apices rounded, wedge-shaped
  3. Axial and central areas wide
  4. Ventral striae about 1/4 valve width at valve center

Valves are wide, up to 22 µm, with rounded, wedge-shaped apices. Axial and central areas are wide. Ventral striae at the valve center are about 1/4 as long as the valve is wide.