Lemnicola hungarica

Valves are linear to linear-elliptical with narrowed, rounded, or subrostrate apices. The raphe valve has a linear axial area and a stauros that is generally asymmetrical. The wider part of the fascia sometimes appears to have a "horse-shoe" depression. Terminal raphe fissures are short, slightly expanded, and turned toward opposite sides. Central raphe ends are drop-like externally, and curved to opposite sides internally. The rapheless valve has a narrow linear axial area and very small, often asymmetric, irregularly shaped, transverse central area. Striae are biseriate and slightly radiate in the valve center, becoming strongly radiate at the apices, 18-24 in 10 µm . External and internal openings of areolae on the valve face are rounded to apically elongated at the valve margin. One row of elongated areolae is present on the valve mantle. Areolae are occluded by hymens internally.