centrohelid heliozoa Kühn, 1926 Count: [f] 6f;4g;1s 1 Suborder Pterocystina Cavalier-Smith & von der Heyden, 2007 Count: [f] 3f;3g 2 Suborder Acanthocystina Cavalier-Smith & von der Heyden, 2007 Count: [f] 3f;1g;1s