Haeckel
Spherical cephalis provided with numerous spines; those directed upwards are interconnected by a spider web-like lattice of very thin bars; the ones directed toward the base support an incipient thorax formed by a coarser lattice with irregular pores, with several very large pores located in the neck area. Overall shell height: ca. 140 µm.
Ref.: Petrushevskaya (1971a).