Valves that are next to each other come into contact through two protuberances on each valve. The windows on these valves are relatively small. Inside these valves, there is a single chloroplast, and the cells are connected in chains. These chains have a straight structure. Each valve has two protuberances positioned close to both ends, near the margins. Thin, perpendicular setae emerge along the chain axis, and the terminal setae, which are located at the ends, do not show any differentiation. All the setae have a circular cross-section and exhibit a distinctive spiral pattern of spines as well as rows of poroids.The primary valve is shaped like a dome, while the secondary valve is characterized by conical spines and flaps made of silica. Notably, these features are only present on the terminal ends of the chains.