Compare Hannaea superiorensis
Hannaea arcus has smaller, wider, less arcuate valves. Hannaea baicalensis is only known from Lake Baikal in Siberia and lacks a tumid dorsal margin. Hannaea linearis has less arcuate valves and lacks recurved apices.
LM scalebar = 10 µm
Length Range
88-166 µm
88-166 µm
Width Range
6-7 µm
6-7 µm
Striae in 10 µm
16-18
16-18
Length Range
15-80 µm
15-80 µm
Width Range
4-7 µm
4-7 µm
Striae in 10 µm
13-14
13-14
