Fragilariopsis cylindrus

Kingdom
Species
Authority
(Grunow in Cleve & M_ller) W.Krieg. in Helmcke & Krieg.
Description

Forms straight or slightly curved ribbon-shaped colonies in girdle view. Each cell has two chloroplasts located along the girdle. In girdle view, cells are low and rectangular. The valves are linear with parallel margins and rounded ends, have an eccentric raphe, no central nodule and approximately the same number of striae and fibulae. Interstriae are parallel except at the poles.

Morphometrics

Apical axis 4.5-74 µm, transapical axis 2.4-4 µm, 12-18 striae and fibulae in 10 µm.

References

Throndsen, J., Hasle, G.R. and Tangen, K., 2007. Phytoplankton of Norwegian coastal waters. Almater Forlag AS. 341 pp.

Observations
Norway