Parent taxon: Polycystina according to P. Noble et al. 2017
See also De Wever et al. 2001, Kozur et al. 1996, Maletz and Bruton 2008 and Takahashi and Miyake 2014
Sister taxa: Actinommacea, Albaillellaria, Archaeospicularia, Latentifistularia, Nassellaria, Protobiramus
Subtaxa: Aciferopylorum Braginella Centrocubidae Cromyostylus Cyclocarpus Ellisus Entactiniidae Eptingiidae Haplentactiniidae Helioentactinia Heptacladidae Hexalonchidae Hexastylidae Hindeosphaeridae Hollandocachoniidae Inaniguttidae Induropilarius Isometractiniidae Kahlerosphaera Kungalariidae Multiarcusellidae Odoghertitidae Palaeolithocycliidae Palaeopentactinorbis Palaeoscenidiidae Paleoxiphosphaera Pentactinocarpidae Polyentactiniidae Protoentactiniacea Proventocitidae Pylentonemidae Quinquecapsulariidae Radium Rhizosphaeridae Saturnalidae Spongoentactinella Spongosaturnaloididae Staurolonchidium Stylodiscus Tetrentactiniidae Thalassothamnidae Triposphaera Triumbraculidae
Ecology: passively mobile planktonic omnivore