cells about 30 µm in diameter (without coat of scales)
scales 6.2–8.6 µm x 4.4–6.5 µm, broadly oval, sometimes oblong
scales curved with the poles bended downwards, edges strongly inlected
scales covering the bases of the axopods
axopods up to 170 µm long
occur in colonies of up to 30 individuals connected via cytoplasmic bridges as well as solitary
cells sometimes with symbiotic algae
centroplast in the center of the cell
nucleus in eccentric position
up to 5 contractile vacuoles