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Caloneis silicula can be distinguished by its biconstricted valve outline and the presence of a transverse central fascia.

LM scalebar = 10 µm
Caloneis Silicula 004 Caloneis Silicula 001 Caloneis Silicula 002 Caloneis Silicula 003 Caloneis Silicula 005
Length Range
27-45 µm
Width Range
5-7 µm
Striae in 10 µm
14-20

Caloneis bacillum

(Grunow) Cleve 1894

Caloneis bacillum LM1 Caloneis bacillum LM5 Caloneis bacillum LM4 Caloneis bacillum LM2 Caloneis bacillum LM3
Length Range
8-20 µm
Width Range
3 µm
Striae in 10 µm
25-29

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