These organisms are characterized by having two plate-like or slightly spiraled chloroplasts with a centrally located nucleus positioned between these chloroplasts. They are primarily composed of individual cells, with filaments being an infrequent occurrence.The cell body of these organisms is constricted near both ends, and its dimensions typically fall within the range of (68-160)-288 μm in length and (7-8)-10.8 μm in width. This results in a length-to-width ratio (L/W) that ranges from 10 to 16. The cell wall is densely granulated.