Haeckel, 1887
Parmal pores circular, very small, only half as broad as thick bars, much smaller than irregular sutural meshes. Accessory spines (100-110) half as long as radius, zigzag. Radial spicules thick, in inner part cylindrical, in outer shorter part conical, of very variable size. Diameter of shell: 0.05 mm, coronal pores: 0.002 mm, sutural pores: 0.006 to 0.012 mm, bars: 0.004 mm.