Haeckel, 1887
Parmal pores pentagonal, three to four times as broad as thick bars, smaller than irregular sutural meshes. Accessory spines (200-300) scarcely one-third as long as radius, zigzag, with strong denticles. Radial spicules very long, stout, quadrangularly-prismatic (two edged according to Popofsky, 1906b), with four serrated edges. Diameter of shell: 0.22 mm, coronal pores: 0.015 mm, sutural pores: 0.012 to 0.03 mm, bars: 0.004 mm.