The cells of this organism have a distinctive shape, with a wedge-shaped girdle-band side and a wedge- or club-shaped valve. Resting cells have two intercalary bands and a more or less long penetrating septum on the head pole. Valves exhibit transapical punctated striae, occasionally with weak transapical ribs, and an extremely delicately punctated intercalary space. There is usually a distinct pseudoraphe, which is sometimes developed as a strong siliceous rib.The organism contains numerous small granules or a few larger chromatophores. When it comes to auxospore formation, as far as is known, it involves the creation of one asexual auxospore within one mother cell. In littoral marine nvironments, this species is anchored to the substrate by a shorter or longer, often branched gelatinous stalk.