Stauroneis Wislouchii Guide
Credit: Loren Bahls
  1. Valves elliptical to elliptic-lanceolate, 25-40 µm long
  2. Apices short protracted and broadly rounded
  3. Striae fine, 24-30 in 10 µm
  4. Central area a rectangular fascia

Valves are elliptic to elliptic-lanceolate, 25-40 µm long, with short protracted and broadly rounded apices. Striae are parallel in the center to weakly radiate towards the ends and number 24-30 in 10 µm. The central area is a rectangular fascia. Areolae are difficult to resolve in LM. Unlike species of Stauroneis, species of Staurophora have a single lobed chloroplast (not shown) and a preference for waters with elevated electrolytes.