Individual vegetative cells of S. turris typically have a slightly greater height than width, and they possess a high valve mantle. These cells exhibit a coarsely areolated structure, and adjacent cells are connected into short, straight chains through the external parts of the long labiate process located in a marginal ring at the junction between the valve face and valve mantle. Additionally, there is a second, less conspicuous ring of labiate processes in these cells.It’s worth noting that there are two similar species, but they can be distinguished by their areolation pattern. In S. turris, the areolae are of the same size across the entire valve surface. In contrast, in the similar species S. palmeriana, the areolae are larger on the valve face than on the valve mantle. Moreover, S. turris is known to produce resting spores.