Encyonema Procerum Guide
  1. Valves dorsiventral, with flat to slightly tumid ventral margins
  2. Valves < 9 µm wide
  3. Maximum L:W of 5.7
  4. Striae 8-13 in 10 µm
  5. Ventral striae short

Valves are dorsiventral with flat to slightly tumid ventral margins. Valves are less than 9 µm wide with a maximum length to width ratio of 5.7. Striae number 8-13 in 10 µm. The ventral striae are short.