Rhizoplegma Haeckel 1881 (radiolarian)
Radiolaria - Polycystina - Astrosphaeridae
PaleoDB taxon number: 283
Parent taxon: Astrosphaeridae according to P. De Wever et al. 2001
Sister taxa: Arachnosphaera, Astrosphaera, Astrospongus, Cladococcus, Diplosphaera, Drymosphaera, Elaphococcus, Haeckeliella, Haplosphaera, Heliosphaera, Heteracantha, Hexancistra, Hexapyramis, Leptosphaera, Lychnosphaera, Porococcus, Rhizospongus, Thalassoplegma
Subtaxa: none
Ecology: passively mobile planktonic omnivore