centrohelid heliozoa Kühn, 1926 Suborder Pterocystina Cavalier-Smith & von der Heyden, 2007 Family Pterocystidae Cavalier-Smith & von der Heyden, 2007 1 Genus Pterocystis Siemensma & Roijackers, 1988 2 Genus Raineriophrys Mikrjukov, 2001 3 Genus Chlamydaster Rainer, 1968