Phylum Radiolaria Müller, 1858 see Subphylum Radiozoa Cavalier-Smith, 1987 Superclass Polycystina Ehrenberg, 1838 see Superclass Polycystinia Ehrenberg, 1838 Class †Aculearia Afanasieva, 1999 Order Fasciculata Afanasieva & Amon, 2003 Family †Palacantholithidae Kozur & Mostler, 1981 Genus †Palaeoumbraculum Amon, Braun & Ivanov, 1995