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Rectangular cells in girdle view with horns 8-10 times the length of apical axis. Circular, elongated and concave valve, many girdle bands. Often epiphyte on Melosira arctica.
Morphometrics: apical axis: 4-12 µm, transapical axis: µm, stria in 10 µm, fibulae in 10 µm
Distribution: Norwegian coastal waters and Arctic.