Haeckel, 1887
Shell thick-walled, sutures hardly visible, surface pustulose or spiny. Spicules outside shell short, proximally wide, then narrowing and strongly flattened. Aspinal pores very large. Sutural pores 8 times smaller than aspinal, funnel-shaped, 1-2 on each suture. Diameter of shell (without spicules): 0.12-0.13 mm; length of main spicules: 0.06-0.07 mm.