(Haeckel, 1887)
Main spicules cylindrical, strongly compressed, sharp at both ends. Secondary spicules ramified, radiating from prominent pore frames. Aspinal pores large, subcircular, surrounded by 9-12 pentagonal depressions with one smaller, circular sutural pore each. Spicule length: 0.15 mm; diameter of lattice sphere: 0.16 mm; aspinal pores: 0.006-0.01 mm; sutural pores: 0.003-0.005 mm.