(Haeckel, 1862)
Spicule elliptical in cross section, flattened to flattened quadrangular. Latticed sphere with thin, bars, forked once or twice from spicules. Pores of two types: large (about 22), and somewhat smaller, elongate (about 120). No accessory spines.: 0.11-0.12 mm; spicule length: 0.1 mm.