Compare Nitzschia clausii
Nitzschia clausii is comparatively narrower than N. brevissima and has finer striae than both N. filiformis and N. sigma. The valves of N. clausii are more sigmoid in shape and have narrower, more constricted apices than N. filiformis. Nitzschia clausii has a curved keel at the valve center, while that of N. sigma is straight at the valve center. N. clausii is narrower and has more narrowly rounded apices than N. scalpelliformis. Nitzschia clausii has apices that are more constricted than those of N. nana.
LM scalebar = 10 µm
Length Range
20.0-68.0 µm
20.0-68.0 µm
Width Range
3.0-5.0 µm
3.0-5.0 µm
Length Range
20-55 µm
20-55 µm
Width Range
3.5-5.5, as measured in the middle of the valve µm
3.5-5.5, as measured in the middle of the valve µm
Striae in 10 µm
37-39
37-39
Length Range
27.0-150.0 µm
27.0-150.0 µm
Width Range
4.0-5.0 µm
4.0-5.0 µm
Striae in 10 µm
29-34
29-34
Length Range
30.0-200.0 µm
30.0-200.0 µm
Width Range
4.0-13.0 µm
4.0-13.0 µm
Striae in 10 µm
19-24
19-24
