Shell spherical. Spicules with elliptical cross section, flattened; pyramidal bases joining in middle into star-shaped body. Size of aspinal pores strongly variable, ellipsoidal or kidney-shaped, surrounded by 5-6 sutural pores 2 times smaller to as large as aspinal pores. In adult specimens all pores funnel-shaped, outer edges of funnels dentate. Sites of junction of 3-4 plates give rise to short spines. Diameter of shell (without spicules): 0.14-0.16 mm; length of main spicules: 0.21 mm; secondary: 0.01-0.016 mm.