When viewed from the side, the cells have a greater height than width, and there are extremely narrow, slit-like openings between the valves. The intercalary setae are oriented in a plane that is approximately perpendicular to the chain’s axis. On the other hand, the terminal setae are well-separated and diverge notably. The chains exhibit a slight twist in their structure. Nevertheless, the most distinctive feature is the resting spores, which are prominently arched and adorned with spines.