Haeckel, 1887
Shell with 54 sutures and 160-200 sutural meshes, with 8 hexagonal and 12 pentagonal plates. Aspinal pores kidney-shaped, surrounded by 15-20 very small, round sutural pores (three to four at each suture). Radial spicules thick, in inner longer part cylindrical, in outer shorter part conical. Differs from all other species in multiplication of sutural pores. Diameter of shell: 0.2 mm, of aspinal pores: 0.016 mm, of sutural pores: 0.004 mm.