Phylum Radiolaria Müller, 1858
see Subphylum Radiozoa Cavalier-Smith, 1987
Superclass Polycystina Ehrenberg, 1838
see Superclass Polycystinia Ehrenberg, 1838
Class Nassellaria Ehrenberg, 1847
Order Cyrtidinata Haeckel, 1862
Superfamily Eucyrtidioidea Ehrenberg, 1847
Family Eucyrtidiidae Ehrenberg, 1847
Subfamily Theocotylinae Petrushevskaya, 1981
Genus †Tetralocorys Petrushevskaya & Kozlova, 1972, nom. null.
see Genus Tetralacorys Haeckel, 1881