Encyonema Nicafei Guide
Credit: Sarah Spaulding
  1. Ventral margin linear
  2. Valve apicies broadly rounded
  3. Central dorsal striae number 9 in 10 μm
  4. Rows of dorsal areolae closest to the central area oval, becoming lineolate

Valves are strongly dorsi-ventral. The dorsal margin is broadly arched, while the ventral margin is linear with broadly rounded apices.