The valve’s surface exhibits intricate features. The outer striated area is slightly raised at the margin and dips as it meets the central part. This central section is elevated to the same level as the outer area, and its surface has an irregular, corrugated appearance, without distinct punctate markings. It is traversed by an undulation that does not extend into the striated outer zone. The valve typically has a diameter ranging from 24 to 32 micrometers, although cells can sometimes be larger.