Compare Fragilaria cyclopum
The central area of Hannaea arcus is unilateral and swollen on the ventral side.
LM scalebar = 10 µm
Length Range
31-70 µm
31-70 µm
Width Range
3.2-7.3 µm
3.2-7.3 µm
Striae in 10 µm
15-18
15-18
Length Range
15-80 µm
15-80 µm
Width Range
4-7 µm
4-7 µm
Striae in 10 µm
13-14
13-14
