Subclass Radiolaria Müller, 1858
see Phylum Actinopoda Calkins, 1902
Order Polycystina Ehrenberg, 1838
see Class Polycystina Ehrenberg, 1838
Suborder Spumellaria Ehrenberg, 1875
see Class Spumellaria Ehrenberg, 1875
Family Spongodiscidae Haeckel, 1862
Genus Spongaster Ehrenberg, 1860
Spongaster tetras Ehrenberg, 1860
1 Spongaster tetras tetrasᵀ Ehrenberg, 1860
2 Spongaster tetras irregularis Nigrini, 1967