Encyonema Lunatum Guide
Credit: Loren Bahls
  1. Ventral margin concave
  2. Valves narrow, <6 µm wide
  3. Areolae fine, ~40 in 10 µm
  4. Apices rounded

Valves are distinctly cresent shaped. Valves are 4.3 to 5.3 µm wide with concave ventral margins and rounded apices. Areolae are fine and number about 40 in 10 µm.