Compare Caloneis fusus
Caloneis tenuis has slightly larger valves and fascia-type central area. Caloneis arctica has larger valves and lower stria density. Species within Genkalia have a similar appearance of the axial and central area, particularly in smaller valves.
LM scalebar = 10 µm
Length Range
21-32 µm
21-32 µm
Width Range
3.6-4.8 µm
3.6-4.8 µm
Striae in 10 µm
21-23
21-23
Length Range
8.9-18.2 µm
8.9-18.2 µm
Width Range
3.8-4.6 µm
3.8-4.6 µm
Striae in 10 µm
28-33
28-33
Also compare to
Caloneis tenuis
BioData Reference
Krammer and Lange-Bertalot 2/1 Pl 174 Fig 5-10