Eunotia Sarraceniae Guide
Credit: Mark Edlund, David Burge
  1. Valves strongly arched
  2. Rimoportulae two per valve
  3. Helictoglossae small but distinct
  4. Ends acutely rounded

Frustules with slight amphoroid symmetry because valves have deeper dorsal mantles. Valves strongly arcuate with acutely rounded ends, margins never parallel. Helictoglossae small. Two rimoportulae per valve.