Phylum Radiolaria Müller, 1858 see Subphylum Radiozoa Cavalier-Smith, 1987 Superclass Polycystina Ehrenberg, 1838 see Superclass Polycystinia Ehrenberg, 1838 Class Nassellaria Ehrenberg, 1847 Order †Pylomariata Afanasieva, 1999 Superfamily †Popofskyelloidea Deflandre, 1964 Family †Popofskyellidae Deflandre, 1964 Genus †Popofskyellum Deflandre, 1964