Compare

The central area of C. mediocris is wider than that of C. hassiaca and C. muscicola. Navicula bergeri is larger and more linear. Ninastrelnikovia gibbosa is larger and cells are often linked together in colonies.

LM scalebar = 10 µm
Chamaepinnularia mediocris LM4 Chamaepinnularia mediocris LM5 Chamaepinnularia mediocris LM6 Chamaepinnularia mediocris LM1 Chamaepinnularia mediocris LM2 Chamaepinnularia mediocris LM3
Length Range
9-16 µm
Width Range
2.7-3.0 µm
Striae in 10 µm
20-24

Ninastrelnikovia gibbosa

(Hust.) Lange-Bert. and Fuhrmann 2014

Ninastrelnikovia gibbosa LM3 Ninastrelnikovia gibbosa LM7 Ninastrelnikovia gibbosa LM4 Ninastrelnikovia gibbosa LM8 Ninastrelnikovia gibbosa LM6 Ninastrelnikovia gibbosa LM5 Ninastrelnikovia gibbosa LM9
Length Range
18.5-21 µm
Width Range
4.0-5 µm
Striae in 10 µm
15-17

Also compare to

Chamaepinnularia hassiaca

(Krasske) Cantonati and Lange-Bert.

Chamaepinnularia muscicola

(J.B.Peterson) Kulikovskiy et al.

Navicula bergeri

Krasske