The valve is cilindrical with a slightly convex face. Areolae are aranged in radial patterns, more concentrated near the center of the valve. There is a submarcinal carona of spines and two (or rarely 1 or 4) large spinesjust inside the circle of smaller spines. A single slime poor is usually near the geometric center of the valve.
(Stoermer and Yang 1969).
This species has been found to be in inland waters with high dissolved solids content and in bracish water.(Stoermer and Yang 1969).