Stauroneis Gracilis Guide
Credit: Loren Bahls
  1. Valves elliptic-lanceolate
  2. Apices subrostrate, broadly rounded
  3. Proximal raphe ends curved, expanded
  4. Areolae 18-22 in 10 µm

Stauroneis gracilis has elliptic-lanceolate valves that are 68 to 127 µm long. The apices are subrostrate and broadly rounded. Proximal raphe ends are curved and expanded. Areolae number 18-22 in 10 µm.