Compare

Navicula medioconvexa is larger, the central area is more distinct, and each stria is uniseriate. Navicula schadei is similar in valve outline, but the central striae are radiate.

LM scalebar = 10 µm
C Schmass 1 C Shmassmannii 113890A 104 1X15 5 C Shmassmannii 113890A 104 5X156 C Shmassmannii 114048B 100X15
Length Range
7.4-8.4 µm
Width Range
2.4-4.0 µm
Striae in 10 µm
30-43

Also compare to

Navicula medioconvexa

Hust.

Navicula schadei

Krasske