Phylum Radiolaria Müller, 1858 see Subphylum Radiozoa Cavalier-Smith, 1987 Superclass Polycystina Ehrenberg, 1838 see Superclass Polycystinia Ehrenberg, 1838 Class Sphaerellaria Haeckel, 1881 Order Sphaerellata Haeckel, 1887 Family †Pantanelliidae Pessagno, 1977 Subfamily †Pantanelliinae Pessagno, 1977 Genus †Zartus Pessagno & Blome, 1980