Nitzschia balcanica is frequently misidentified as N. capitellata in samples from the US. Nitzschia balcanica differs by having much finer striae (Hustedt lists ca. 40 in 10 µm for it versus 30-32 in 10 µm for N. capitellata).

LM scalebar = 10 µm
Length Range
23.0-63.0 µm
Width Range
4.0-5.0 µm
Striae in 10 µm
38-40
Nitzschia balcanica LM1
Nitzschia balcanica LM2
Nitzschia balcanica LM3
Nitzschia balcanica LM4
Nitzschia balcanica LM5
Nitzschia balcanica LM1 Nitzschia balcanica LM2 Nitzschia balcanica LM3 Nitzschia balcanica LM4 Nitzschia balcanica LM5

Also compare to

Nitzschia capitellata

Hust.