The cells are double-convex, existing individually and unattached. Their valves are circular and mostly flat but sometimes slightly concave in the middle, with a small height difference between one side and the other. The valve surface is covered with a fine, nearly hexagonal pattern of small openings that radiate from a well-defined cluster of larger openings in the center, which are often elongated or somewhat oval in shape. The density of these small openings is about 5-6 per 10 micrometers near the center, 8-9 per 10 micrometers at about halfway to the edge, and 13-15 per 10 micrometers near the margin. These openings are loculate, meaning they have a cover pore in the inner membrane and a finely porous sieve membrane. Near the margin, the openings are organized in obliquely intersecting rows of curved lines. About halfway to the edge, there is often an irregular ring of small spines. Inside the margin, there’s a distinct row of spines, spaced roughly 8-10 micrometers apart, from which narrow, transparent structures extend toward the center. These transparent structures are highlighted by a row of slightly larger openings on either side. Two large conical protrusions are positioned near the margin, with an angle of approximately 110-120 degrees separating them. The diameter of the valve typically ranges from 140 to 250 micrometers.