Haeckel, 1887
Anterior spicule little different from two lateral spicules, each with two divergent straight horns, shorter than basal part. Posterior spicule simple, triangular, shorter than three former. Eight tropical spicules of equal size and form, doubly forked, each with four thin, bristle-shaped, little divergent teeth. Eight polar spicules short, simply forked. Length of equatorial cross: 0.5 mm, breadth: 0.4 mm.