Alternative spelling: Polycystida
Parent taxon: Radiolaria according to O. Takahashi and Y. Miyake 2014
See also Afanasieva et al. 2005, Buckman and Aitchison 2001, De Wever et al. 2001, Feng et al. 2004, Kozur et al. 1996 and Maletz and Bruton 2008
Sister taxa: Actinommura, Amphicraspedum, Anthocyrtium, Artocyrtis, Astractinium, Cadium, Clathrocircus, Clathrocorona, Copiconica, Corythomelissa, Cromyatractus, Cromyechinus, Cryptoprora, Cyrtophormis, Dictyoceras, Dictyocodon, Dictyocryphalus, Drymyomma, Euphysetta, Gyrosphaera, Hataina, Heliaster, Heliosestilla, Labyrinthosphaera, Lithamphora, Lithocampium, Lithocorythium, Lithomitrella, Lithopilium, Lithotympanium, Lynchnocanella, Panartus, Parafollicucullinoides, Pentinastrum, Peridium, Peritiviator, Pheodaria, Protocystis, Pseudostaurosphaera, Psilomelissa, Rotasphaeracea, Schizodiscus, Sethamphora, Sethocorys, Soreuma, Spongosphaera, Stichopera, Stichopilidium, Stichopilium, Stichopodium, Stichopterygium, Stomatosphaera, Stylotrochus, Tepka, Tessarastrum, Tessarospyris, Tetracorethra, Thamnospyris, Theoconus, Triactiscus, Trigonactinium, Veles, Zygospyris
Subtaxa: Albaillellaria Archaeospicularia Collodaria Entactinaria Latentifistularia Nassellaria Protobiramus Spumellaria
Ecology: passively mobile planktonic omnivore