No picture so far.
Cells and setae contain many small chloroplasts. Occurs usually as single cells or occasionally as short chains with small windows. Setae (including terminal setae when in chains) are perpendicular to the pervalvar axis (length axis of the chain).
Apical axis measure 5-20 um.
Throndsen, J., Hasle, G.R. and Tangen, K., 2007. Phytoplankton of Norwegian coastal waters. Almater Forlag AS. 341 pp.