The valves of this species are commonly linear at their central region, ranging from 60 to 600 μm in length, although they typically fall within the range of 150-250 μm, and they have a width of 5-9 μm. These valves gradually narrow towards the tips, which can be either blunt, slightly pointed, or somewhat beak-like, with the tip’s width being less than half of the valve’s width. It’s important to note that this species exhibits considerable variation in its physical characteristics, and it is frequently encountered in a wide range of aquatic environments, from mesotrophic to eutrophic waters. This environmental adaptability contributes to its widespread distribution and the diversity in its appearance.