The cells are lengthy and may be straight or twisted, frequently forming chains that coil around the long axis. In a wide girdle view, they appear oblong and are characterized by long, slender processes with sharp tips. The apical axis measures between 12-35 µm in length. The valve surface is generally flat or slightly concave, with no visible grooves. The valve mantle is high, and there is no groove at the junction with the girdle band. The apertures between cells are relatively large due to the presence of these long processes. The cell wall is weakly siliceous and often lacks discernible sculpturing, although when visible, puncta number around 16-17 in 10 µm on the valves.