Navicula Perotii Guide
Credit: Paul Hamilton
  1. Valves linear to linear-lanceolate, with narrow rounded apices
  2. Central area small, asymmetric, round
  3. Striae irregularly spaced near central area

Valves are linear to linear-lanceolate, with narrow rounded apices. The small asymmetric central area is distinct and the axial area is narrow. Striae are narrowly spaced except around the central area. Striae are coarse and number 10-12 in 10 ┬Ám. Lineate areolae are easy to observe. The proximal raphe fissures are expanded. The distal raphe fissures are scythe-shaped.