Haeckel, 1887
Spicules long or short; usually short, in basal third (to point where apophyses are inserted) of uniform thickness, prismatic, from there on tapering, tips sharp. Less often specimens with long, needle-like spicules, as well as short and long spicules. Apophyses very variable in shape. Primary branches of apophyses cylindrical or slightly compressed; approximately from center arise short, opposing secondary branches, which may in turn give rise to perpendicularly inserted, short tertiary branches of irregular distribution. Sometimes primary branches give rise to several (rather than 1) pairs of secondary ones. Secondary and tertiary branches may cross each other at right angles, but never coalesce (as in the genus Phatnacantha). Leaf-star occupying a small portion of central capsule. Spicule length: 0.35-0.45 mm; primary branches: 0.05-0.08 mm; secondary: 0.016-0.03 mm, tertiary: 0.008-0.01 mm.