These diatoms can be found as individual cells or arranged in short chains. They are characterized by the presence of numerous small chloroplasts and an elongated central spine, which is a prominent feature. In terms of their shape, these diatoms can be described as triangular prisms. They are encased in a frustule, a protective siliceous shell.These diatoms exhibit a wide range of sizes, with lengths varying from 40 to 300 µm and diameters ranging from 14 to 120 µm. Their color is typically yellow-brown, which is a common hue for diatoms.Reproduction in these diatoms can occur through both sexual and asexual means. They have the capability to produce resting spores, which are a form of dormant stage that allows them to survive adverse environmental conditions. Additionally, microspores are part of their reproductive repertoire.