Eunotia Pectinalis Guide
Credit: David Burge
  1. Valves dorsiventral
  2. Dorsal undulations 3-5
  3. Central inflation on ventral margin
  4. Apices rounded and recurved

Valves are asymmetric about the apical axis, with 3-5 undulations on the dorsal margin. A central inflation is present on the ventral margin. The apices are rounded and recurved to the dorsal side.