The valve of this taxon is elliptical. It has a siliceous rib that encloses the raphe valve. The raphe valve is broad and well developed. The central area is elliptical as well. There are distinct, narrow extensions of the central area. The longitudinal canals are broad and the ends of the raphe valve are far apart. There are one or two rows of pores on the outer surface of this taxon. There are two rows of alveoli between the costae (Patrick and Reimer 1966).