Frustulia Neomundana Guide
Credit: Carrie Graeff
  1. Longitudinal ribs complete on one side of the valve
  2. Apices rostrate
  3. External proximal raphe ends unilaterally deflected

The longitudinal ribs of F. neomundana are complete on one the side of the valve, the same side to which the proximal raphe ends are deflected. The valves are linear-lanceolate with rostrate apices. The external proximal raphe ends are unilaterally deflected.