Haeckel, 1860
Shell a spherical or egg-shaped lattice. Spicules very long, three to four times as long as lattice shell; flattened in proximal third, quadrangular, in distal portion two-edged; proximal portion of spicules produce rhombic lattice plates, which are fused through end branches with neighboring lattice plates to form lattice shell. Lattice plate pores of different sizes, always quadrangular. Diameter of latticed sphere: 0.16-0.22 mm; spicule length: 0.6-0.88 mm.