Chamaepinnularia soehrensis has a distinct triundulate outline. Chamaepinnularia mediocris has rounded apices. Chamaepinnularia muscicola has less strongly capitate apices and a comparatively smaller central expansion. Ninastrelnikovia gibbosa is larger and cells are often linked together in colonies.

LM scalebar = 10 µm
Chamaepinnularia Hassiaca Me10020 A 042318 01 Csharpened Chamaepinnularia Hassiaca Me10020 A 102017 185 Csharpened Chamaepinnularia Hassiaca Cthp001 A 112117 37 Csharpened Chamaepinnularia Hassiaca Instaar15632 B 031517 02 Csharpened Chamaepinnularia Hassiaca Me10019 A 101817 106 Csharpened
Length Range
8.8-10.8 µm
Width Range
2.5-2.7 µm
Striae in 10 µm

Chamaepinnularia soehrensis

(Krasske) Lange-Bert. and Krammer in Lange-Bert. and Metzeltin 1996

Chamaepinnularia soehrensis LM2 Chamaepinnularia soehrensis LM5 Chamaepinnularia soehrensis LM1 Chamaepinnularia soehrensis LM6 Chamaepinnularia soehrensis LM7 Chamaepinnularia soehrensis LM3
Length Range
10-12 µm
Width Range
2 µm
Striae in 10 µm

Chamaepinnularia mediocris

(Krasske) Lange-Bert. in Lange-Bert. and Metzeltin 1996

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

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

Also compare to

Chamaepinnularia muscicola

(J.B.Petersen) Kulikovskiy, Lange-Bert. and Witkowski