Full reference: K. Y. Yeh. 1989. Studies of Radiolaria from the Fields Creek Formation, east-central Oregon, USA. Bulletin of the National Museum of Natural Science 1:43-109
Parent taxon: Entactinaria according to L. O'Dogherty et al. 2009
Sister taxa: Braginella, Centrocubidae, Ellisus, Entactiniidae, Eptingiidae, Haplentactinia, Haplentactiniidae, Heptacladidae, Hexalonchidae, Hexastylidae, Hindeosphaeridae, Inaniguttidae, Kahlerosphaera, Kungalariidae, Multiarcusellidae, Palaeolithocycliidae, Palaeoscenidiidae, Pentactinocarpidae, Polyentactiniidae, Protoentactiniacea, Proventocitidae, Pylentonemidae, Quinquecapsulariidae, Rhizosphaeridae, Saturnalidae, Sphaeroentactiniidae, Spongentactiniidae, Spongosaturnaloididae, Thalassothamnidae
Subtaxa: Radium pessagnoi
Type: Radium pessagnoi
Ecology: passively mobile planktonic omnivore