Compare Fragilariforma virescens
Fragilariforma virescens differs from F. nitzschioides in the shape of the apices, stria density and the shape in girdle view. Stauroforma exiguiformis lacks rimoportulae and a distinct central sternum.
LM scalebar = 10 µm
Length Range
15-60 µm
15-60 µm
Width Range
6.5-7.0 µm
6.5-7.0 µm
Striae in 10 µm
20-22
20-22
Length Range
19-54 µm
19-54 µm
Width Range
3.5-5.5 µm
3.5-5.5 µm
Striae in 10 µm
18-25
18-25
Length Range
4-22 µm
4-22 µm
Width Range
3-4 µm
3-4 µm
Striae in 10 µm
16-20
16-20
