The valves of this organism are moderately sigmoid, ranging from slender to somewhat more broadly lanceolate, with fairly obtuse or subacute ends.The raphe sternum exhibits minimal double curvature, being almost straight for approximately half its length and nearly median in position, although slightly eccentric near the ends. The central raphe fissures have a “crook-shaped” appearance, deflecting oppositely toward either the convex or concave side of their raphe sternum, indicative of a dimorphic deflection type.The central area is oval and not rotated. The terminal areas unilaterally expand into dilated funnels in a semilateral position. A crescent of tiny apical microforamina encircles the apex within the hyaline terminal area.